Merge branch 'develop' into feature/6680-multiple-stereotypes

Fix classDiagram example

.changeset/brave-memes-flash.md

@@ -0,0 +1,5 @@
+---
+'mermaid': patch
+---
+
+fix: Support edge animation in hand drawn look

.changeset/busy-mirrors-try.md

@@ -0,0 +1,5 @@
+---
+'mermaid': patch
+---
+
+fix: Resolved parsing error where direction TD was not recognized within subgraphs

.changeset/curly-apes-prove.md

@@ -0,0 +1,5 @@
+---
+'mermaid': patch
+---
+
+fix: Improve participant parsing and prevent recursive loops on invalid syntax

.changeset/deep-pumas-run.md

@@ -0,0 +1,5 @@
+---
+'mermaid': patch
+---
+
+chore: Fix mindmap rendering in docs and apply tidytree layout

.changeset/four-eyes-wish.md

@@ -0,0 +1,5 @@
+---
+'mermaid': patch
+---
+
+fix: Ensure edge label color is applied when using classDef with edge IDs

.changeset/loud-results-melt.md

@@ -0,0 +1,5 @@
+---
+'mermaid': minor
+---
+
+feat: Add half-arrowheads (solid & stick) and central connection support

.changeset/moody-fans-try.md

@@ -0,0 +1,5 @@
+---
+'mermaid': patch
+---
+
+fix: Resolve gantt chart crash due to invalid array length

.changeset/proud-colts-smell.md

@@ -0,0 +1,5 @@
+---
+'mermaid': minor
+---
+
+feat: Add IDs in architecture diagrams

.changeset/revert-marked-dependency.md

@@ -0,0 +1,9 @@
+---
+'mermaid': patch
+---
+
+chore: revert marked dependency from ^15.0.7 to ^16.0.0
+
+- Reverted marked package version to ^16.0.0 for better compatibility
+- This is a dependency update that maintains API compatibility
+- All tests pass with the updated version

.changeset/slow-lemons-know.md

@@ -0,0 +1,5 @@
+---
+'@mermaid': patch
+---
+
+fix: Mindmap breaking in ELK layout

.changeset/sweet-games-build.md

@@ -0,0 +1,5 @@
+---
+'mermaid': patch
+---
+
+fix(er-diagram): prevent syntax error when using 'u', numbers, and decimals in node names

.github/workflows/codeql.yml

@@ -26,8 +26,8 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        language: ['javascript']
-        # CodeQL supports [ 'cpp', 'csharp', 'go', 'java', 'javascript', 'python', 'ruby' ]
+        language: ['javascript', 'actions']
+        # CodeQL supports [ 'actions', 'cpp', 'csharp', 'go', 'java', 'javascript', 'python', 'ruby' ]
         # Learn more about CodeQL language support at https://aka.ms/codeql-docs/language-support
 
     steps:

cypress/helpers/util.ts

@@ -6,6 +6,7 @@ interface CypressConfig {
   listUrl?: boolean;
   listId?: string;
   name?: string;
+  screenshot?: boolean;
 }
 type CypressMermaidConfig = MermaidConfig & CypressConfig;
 
@@ -90,7 +91,7 @@ export const renderGraph = (
 
 export const openURLAndVerifyRendering = (
   url: string,
-  options: CypressMermaidConfig,
+  { screenshot = true, ...options }: CypressMermaidConfig,
   validation?: any
 ): void => {
   const name: string = (options.name ?? cy.state('runnable').fullTitle()).replace(/\s+/g, '-');
@@ -103,7 +104,9 @@ export const openURLAndVerifyRendering = (
     cy.get('svg').should(validation);
   }
 
-  verifyScreenshot(name);
+  if (screenshot) {
+    verifyScreenshot(name);
+  }
 };
 
 export const verifyScreenshot = (name: string): void => {

cypress/integration/rendering/erDiagram.spec.js

@@ -369,4 +369,92 @@ ORDER ||--|{ LINE-ITEM : contains
       );
     });
   });
+
+  describe('Special characters and numbers syntax', () => {
+    it('should render ER diagram with numeric entity names', () => {
+      imgSnapshotTest(
+        `
+        erDiagram
+          1 ||--|| ORDER : places
+          ORDER ||--|{ 2 : contains
+          2 ||--o{ 3.5 : references
+        `,
+        { logLevel: 1 }
+      );
+    });
+
+    it('should render ER diagram with "u" character in entity names and cardinality', () => {
+      imgSnapshotTest(
+        `
+        erDiagram
+          CUSTOMER ||--|| u : has
+          u ||--|| ORDER : places
+          PROJECT u--o{ TEAM_MEMBER : "parent"
+        `,
+        { logLevel: 1 }
+      );
+    });
+
+    it('should render ER diagram with decimal numbers in relationships', () => {
+      imgSnapshotTest(
+        `
+        erDiagram
+          2.5 ||--|| 1.5 : has
+          CUSTOMER ||--o{ 3.14 : references
+          1.0 ||--|{ ORDER : contains
+        `,
+        { logLevel: 1 }
+      );
+    });
+
+    it('should render ER diagram with numeric entity names and attributes', () => {
+      imgSnapshotTest(
+        `
+        erDiagram
+          1 {
+            string name
+            int value
+          }
+          1 ||--|| ORDER : places
+          ORDER {
+            float price
+            string description
+          }
+        `,
+        { logLevel: 1 }
+      );
+    });
+
+    it('should render complex ER diagram with mixed special entity names', () => {
+      imgSnapshotTest(
+        `
+        erDiagram
+          CUSTOMER ||--o{ 1 : places
+          1 ||--|{ u : contains
+          1.5
+          u ||--|| 2.5 : processes
+          2.5 {
+            string id
+            float value
+          }
+          u {
+            varchar(50) name
+            int count
+          }
+        `,
+        { logLevel: 1 }
+      );
+    });
+    it('should render ER diagram with numeric entity names and attributes', () => {
+      imgSnapshotTest(
+        `erDiagram
+         PRODUCT ||--o{ ORDER-ITEM : has
+         1.5
+         u
+         1
+        `,
+        { logLevel: 1 }
+      );
+    });
+  });
 });

cypress/integration/rendering/flowchart-handDrawn.spec.js

@@ -1029,4 +1029,19 @@ graph TD
       }
     );
   });
+
+  it('FDH49: should add edge animation', () => {
+    renderGraph(
+      `
+      flowchart TD
+          A(["Start"]) L_A_B_0@--> B{"Decision"}
+          B --> C["Option A"] & D["Option B"]
+          style C stroke-width:4px,stroke-dasharray: 5
+          L_A_B_0@{ animation: slow } 
+          L_B_D_0@{ animation: fast }`,
+      { look: 'handDrawn', screenshot: false }
+    );
+    cy.get('path#L_A_B_0').should('have.class', 'edge-animation-slow');
+    cy.get('path#L_B_D_0').should('have.class', 'edge-animation-fast');
+  });
 });

cypress/integration/rendering/flowchart.spec.js

@@ -774,6 +774,21 @@ describe('Graph', () => {
       expect(svg).to.not.have.attr('style');
     });
   });
+  it('40: should add edge animation', () => {
+    renderGraph(
+      `
+      flowchart TD
+          A(["Start"]) L_A_B_0@--> B{"Decision"}
+          B --> C["Option A"] & D["Option B"]
+          style C stroke-width:4px,stroke-dasharray: 5
+          L_A_B_0@{ animation: slow } 
+          L_B_D_0@{ animation: fast }`,
+      { screenshot: false }
+    );
+    // Verify animation classes are applied to both edges
+    cy.get('path#L_A_B_0').should('have.class', 'edge-animation-slow');
+    cy.get('path#L_B_D_0').should('have.class', 'edge-animation-fast');
+  });
   it('58: handle styling with style expressions', () => {
     imgSnapshotTest(
       `
@@ -973,4 +988,19 @@ graph TD
       }
     );
   });
+
+  it('70: should render a subgraph with direction TD', () => {
+    imgSnapshotTest(
+      `
+      flowchart LR
+        subgraph A
+          direction TD
+          a --> b
+        end
+      `,
+      {
+        fontFamily: 'courier',
+      }
+    );
+  });
 });

cypress/integration/rendering/sequencediagram-v2.spec.js

@@ -655,5 +655,126 @@ describe('Sequence Diagram Special Cases', () => {
         expect(svg).to.not.have.attr('style');
       });
     });
+
+    describe('Central Connection Rendering Tests', () => {
+      it('should render central connection circles on actor vertical lines', () => {
+        imgSnapshotTest(
+          `sequenceDiagram
+        participant Alice
+        participant Bob
+        participant Charlie
+        Alice ()->>() Bob: Central connection
+        Bob ()-->> Charlie: Reverse central connection
+        Charlie ()<<-->>() Alice: Dual central connection`,
+          { look: 'classic', sequence: { diagramMarginX: 50, diagramMarginY: 10 } }
+        );
+      });
+
+      it('should render central connections with different arrow types', () => {
+        imgSnapshotTest(
+          `sequenceDiagram
+        participant Alice
+        participant Bob
+        Alice ()->>() Bob: Solid open arrow
+        Alice ()-->>() Bob: Dotted open arrow
+        Alice ()-x() Bob: Solid cross
+        Alice ()--x() Bob: Dotted cross
+        Alice ()->() Bob: Solid arrow`,
+          { look: 'classic', sequence: { diagramMarginX: 50, diagramMarginY: 10 } }
+        );
+      });
+
+      it('should render central connections with bidirectional arrows', () => {
+        imgSnapshotTest(
+          `sequenceDiagram
+        participant Alice
+        participant Bob
+        Alice ()<<->>() Bob: Bidirectional solid
+        Alice ()<<-->>() Bob: Bidirectional dotted`,
+          { look: 'classic', sequence: { diagramMarginX: 50, diagramMarginY: 10 } }
+        );
+      });
+
+      it('should render central connections with activations', () => {
+        imgSnapshotTest(
+          `sequenceDiagram
+        participant Alice
+        participant Bob
+        participant Charlie
+        Alice ()->>() Bob: Activate Bob
+        activate Bob
+        Bob ()-->> Charlie: Message to Charlie
+        Bob ()->>() Alice: Response to Alice
+        deactivate Bob`,
+          { look: 'classic', sequence: { diagramMarginX: 50, diagramMarginY: 10 } }
+        );
+      });
+
+      it('should render central connections mixed with normal messages', () => {
+        imgSnapshotTest(
+          `sequenceDiagram
+        participant Alice
+        participant Bob
+        participant Charlie
+        Alice ->> Bob: Normal message
+        Bob ()->>() Charlie: Central connection
+        Charlie -->> Alice: Normal dotted message
+        Alice ()<<-->>() Bob: Dual central connection
+        Bob -x Charlie: Normal cross message`,
+          { look: 'classic', sequence: { diagramMarginX: 50, diagramMarginY: 10 } }
+        );
+      });
+
+      it('should render central connections with notes', () => {
+        imgSnapshotTest(
+          `sequenceDiagram
+        participant Alice
+        participant Bob
+        participant Charlie
+        Alice ()->>() Bob: Central connection
+        Note over Alice,Bob: Central connection note
+        Bob ()-->> Charlie: Reverse central connection
+        Note right of Charlie: Response note
+        Charlie ()<<-->>() Alice: Dual central connection`,
+          { look: 'classic', sequence: { diagramMarginX: 50, diagramMarginY: 10 } }
+        );
+      });
+
+      it('should render central connections with loops and alternatives', () => {
+        imgSnapshotTest(
+          `sequenceDiagram
+        participant Alice
+        participant Bob
+        participant Charlie
+        loop Every minute
+            Alice ()->>() Bob: Central heartbeat
+            Bob ()-->> Charlie: Forward heartbeat
+        end
+        alt Success
+            Charlie ()<<-->>() Alice: Success response
+        else Failure
+            Charlie ()-x() Alice: Failure response
+        end`,
+          { look: 'classic', sequence: { diagramMarginX: 50, diagramMarginY: 10 } }
+        );
+      });
+
+      it('should render central connections with different participant types', () => {
+        imgSnapshotTest(
+          `sequenceDiagram
+          participant Alice
+          actor Bob
+          participant Charlie@{"type":"boundary"}
+          participant David@{"type":"control"}
+          participant Eve@{"type":"entity"}
+          Alice ()->>() Bob: To actor
+          Bob ()-->> Charlie: To boundary
+          Charlie ()->>() David: To control
+          David ()<<-->>() Eve: To entity
+          Eve ()-x() Alice: Back to participant`,
+          { look: 'classic', sequence: { diagramMarginX: 50, diagramMarginY: 10 } }
+        );
+      });
+    });
   });
 });

cypress/integration/rendering/sequencediagram.spec.js

@@ -1053,4 +1053,167 @@ describe('Sequence diagram', () => {
       ]);
     });
   });
+  describe('render new arrow type', () => {
+    it('should render Solid half arrow top', () => {
+      imgSnapshotTest(
+        `
+    sequenceDiagram
+      Alice -|\\  John: Hello John, how are you? 
+      Alice-|\\  John: Hi Alice, I can hear you!
+      Alice -|\\  John: Test
+      `
+      );
+    });
+    it('should render Solid half arrow bottom', () => {
+      imgSnapshotTest(
+        `
+    sequenceDiagram
+      Alice-|/John: Hello John, how are you?
+      Alice-|/John: Hi Alice, I can hear you!
+      Alice-|/John: Test
+      `
+      );
+    });
+
+    it('should render Stick half arrow top ', () => {
+      imgSnapshotTest(
+        `
+     sequenceDiagram
+      Alice-\\\\John: Hello John, how are you?
+      Alice-\\\\John: Hi Alice, I can hear you!
+      Alice-\\\\John: Test
+      `
+      );
+    });
+    it('should render Stick half arrow bottom ', () => {
+      imgSnapshotTest(
+        `
+       sequenceDiagram
+      Alice-//John: Hello John, how are you?
+      Alice-//John: Hi Alice, I can hear you!
+      Alice-//John: Test
+      `
+      );
+    });
+    it('should render Solid half arrow top reverse ', () => {
+      imgSnapshotTest(
+        `
+       sequenceDiagram
+      Alice/|-John: Hello Alice, how are you?
+      Alice/|-John: Hi Alice, I can hear you!
+      Alice/|-John: Test
+
+      `
+      );
+    });
+
+    it('should render Solid half arrow bottom reverse ', () => {
+      imgSnapshotTest(
+        `sequenceDiagram
+        Alice \\|- John: Hello Alice, how are you?
+        Alice \\|- John: Hi Alice, I can hear you!
+        Alice \\|- John: Test`
+      );
+    });
+
+    it('should render Stick half arrow top reverse ', () => {
+      imgSnapshotTest(
+        `
+      sequenceDiagram
+      Alice //-John: Hello Alice, how are you?
+      Alice //-John: Hi Alice, I can hear you!
+      Alice //-John: Test`
+      );
+    });
+
+    it('should render Stick half arrow bottom reverse ', () => {
+      imgSnapshotTest(
+        `
+       sequenceDiagram
+      Alice \\\\-John: Hello Alice, how are you?
+      Alice \\\\-John: Hi Alice, I can hear you!
+      Alice \\\\-John: Test`
+      );
+    });
+
+    it('should render Solid half arrow top dotted', () => {
+      imgSnapshotTest(
+        `
+     sequenceDiagram
+      Alice --|\\John: Hello John, how are you?
+      Alice --|\\John: Hi Alice, I can hear you!
+      Alice --|\\John: Test`
+      );
+    });
+
+    it('should render Solid half arrow bottom dotted', () => {
+      imgSnapshotTest(
+        `
+     sequenceDiagram
+      Alice --|/John: Hello John, how are you?
+      Alice --|/John: Hi Alice, I can hear you!
+      Alice --|/John: Test`
+      );
+    });
+
+    it('should render Stick half arrow top dotted', () => {
+      imgSnapshotTest(
+        `
+     sequenceDiagram
+      Alice--\\\\John: Hello John, how are you?
+      Alice--\\\\John: Hi Alice, I can hear you!
+      Alice--\\\\John: Test`
+      );
+    });
+
+    it('should render Stick half arrow bottom dotted', () => {
+      imgSnapshotTest(
+        `
+     sequenceDiagram
+      Alice--//John: Hello John, how are you?
+      Alice--//John: Hi Alice, I can hear you!
+      Alice--//John: Test`
+      );
+    });
+
+    it('should render Solid half arrow top reverse dotted', () => {
+      imgSnapshotTest(
+        `
+  sequenceDiagram
+      Alice/|--John: Hello Alice, how are you?
+      Alice/|--John: Hi Alice, I can hear you!
+      Alice/|--John: Test`
+      );
+    });
+
+    it('should render Solid half arrow bottom reverse dotted', () => {
+      imgSnapshotTest(
+        `
+  sequenceDiagram
+      Alice\\|--John: Hello Alice, how are you?
+      Alice\\|--John: Hi Alice, I can hear you!
+      Alice\\|--John: Test`
+      );
+    });
+
+    it('should render Stick half arrow top reverse dotted ', () => {
+      imgSnapshotTest(
+        `
+  sequenceDiagram
+      Alice//--John: Hello Alice, how are you?
+      Alice//--John: Hi Alice, I can hear you!
+      Alice//--John: Test`
+      );
+    });
+
+    it('should render Stick half arrow bottom reverse dotted ', () => {
+      imgSnapshotTest(
+        `
+  sequenceDiagram
+      Alice\\\\--John: Hello Alice, how are you?
+      Alice\\\\--John: Hi Alice, I can hear you!
+      Alice\\\\--John: Test`
+      );
+    });
+  });
 });

cypress/platform/knsv2.html

@@ -110,6 +110,48 @@
       config:
         layout: elk
       ---
+      mindmap
+      root((mindmap))
+        Origins
+          Long history
+          ::icon(fa fa-book)
+          Popularisation
+            British popular psychology author Tony Buzan
+        Research
+          On effectiveness<br/>and features
+          On Automatic creation
+            Uses
+                Creative techniques
+                Strategic planning
+                Argument mapping
+        Tools
+              id)I am a cloud(
+                  id))I am a bang((
+                    Tools
+    </pre>
+    <pre id="diagram4" class="mermaid">
+      ---
+      config:
+        layout: elk
+      ---
+      flowchart
+       aid0
+  </pre
+    >
+    <pre id="diagram4" class="mermaid">
+      ---
+      config:
+        layout: elk
+      ---
+      mindmap
+      aid0
+
+    </pre>
+    <pre id="diagram4" class="mermaid">
+      ---
+      config:
+        layout: ogdc
+      ---
       flowchart-elk TB
       c1-->a2
       subgraph one

cypress/platform/yari.html

@@ -603,6 +603,10 @@
       </div>
       <div class="test">
         <pre class="mermaid">
+          ---
+            config:
+              theme: dark
+          ---
           classDiagram
             test ()--() test2
         </pre>

demos/classchart.html

@@ -33,12 +33,15 @@
       Animal: +mate()
 
       class Duck{
+    <<injected>>
+          <<interface>>
+    
         +String beakColor
         +swim()
         +quack()
       }
       class Fish{
-        -Listint sizeInFeet
+        -List~int~ sizeInFeet
         -canEat()
       }
       class Zebra{
@@ -56,6 +59,8 @@
     Class01 <|-- AveryLongClass : Cool
 
     &lt;&lt;interface&gt;&gt; Class01
+    &lt;&lt;injected&gt;&gt; Class01
+    
     Class03 "0" *-- "0..n" Class04
     Class05 "1" o-- "many" Class06
     Class07 .. Class08
@@ -156,7 +161,7 @@
         ~InternalProperty : string
         ~AnotherInternalProperty : List~List~string~~
       }
-      class People List~List~Person~~
+      class People List~Person~
     </pre>
     <hr />
     <pre class="mermaid">

demos/multiple-annotations-test.html

@@ -0,0 +1,118 @@
+<!doctype html>
+<html lang="en">
+  <head>
+    <meta charset="UTF-8" />
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <title>Multiple Annotations Test</title>
+    <style>
+      body {
+        font-family: Arial, sans-serif;
+        margin: 20px;
+        background-color: #f5f5f5;
+      }
+      h1,
+      h2 {
+        color: #333;
+      }
+      .mermaid {
+        background: white;
+        border: 1px solid #ddd;
+        border-radius: 5px;
+        padding: 20px;
+        margin: 20px 0;
+      }
+      .description {
+        background: #e8f4fd;
+        border-left: 4px solid #0066cc;
+        padding: 10px;
+        margin: 10px 0;
+      }
+    </style>
+  </head>
+  <body>
+    <h1>Multiple Annotations Test - Issue #6680 Fix</h1>
+
+    <div class="description">
+      <strong>Testing:</strong> Multiple stereotypes/annotations should now render correctly using
+      external and inline annotation methods.
+    </div>
+
+    <h2>Baseline - no annotations</h2>
+    <pre class="mermaid">
+classDiagram
+    class Shape
+    class Circle
+    class Triangle
+    </pre>
+
+    <h2>#0 Baseline - single annotation</h2>
+    <pre class="mermaid">
+classDiagram
+    class Shape
+    class Circle
+    class Triangle
+
+    &LT;&LT;injected&GT;&GT; Shape
+    </pre>
+
+    <h2>Method 1: External/Next-line Annotations</h2>
+    <div class="description">
+      External annotations defined on the line after the class definition:
+    </div>
+    <pre class="mermaid">
+    classDiagram
+        class Shape
+        &LT;&LT;interface&GT;&GT; &LT;&LT;injected&GT;&GT; Shape
+        class Circle
+        &LT;&LT;abstract&GT;&GT; &LT;&LT;serializable&GT;&GT; Circle
+        class Triangle
+        &LT;&LT;interface&GT;&GT; &LT;&LT;cached&GT;&GT; &LT;&LT;singleton&GT;&GT; Triangle
+    </pre>
+
+    <h2>Method 2: Inline Annotations</h2>
+    <div class="description">Inline annotations defined directly with the class definition:</div>
+    <pre class="mermaid">
+    classDiagram
+        class Shape &LT;&LT;interface&GT;&GT; &LT;&LT;injected&GT;&GT;
+        class Circle &LT;&LT;abstract&GT;&GT; &LT;&LT;serializable&GT;&GT;
+        class Square &LT;&LT;service&GT;&GT; &LT;&LT;singleton&GT;&GT; &LT;&LT;cached&GT;&GT;
+        class Triangle &LT;&LT;interface&GT;&GT; &LT;&LT;component&GT;&GT; &LT;&LT;transient&GT;&GT;
+    </pre>
+
+    <h2>Method 3: Mixed Methods Test</h2>
+    <div class="description">Combination of both external and inline annotation methods:</div>
+    <pre class="mermaid">
+    classDiagram
+        class Component &LT;&LT;interface&GT;&GT; &LT;&LT;injected&GT;&GT;
+        class Service
+        &LT;&LT;abstract&GT;&GT; &LT;&LT;singleton&GT;&GT; Service
+        class Repository &LT;&LT;dao&GT;&GT; &LT;&LT;cached&GT;&GT;
+        class Controller
+        &LT;&LT;rest&GT;&GT; &LT;&LT;secured&GT;&GT; Controller
+    </pre>
+
+    <h2>Real-world Example</h2>
+    <div class="description">A practical example with relationships and multiple annotations:</div>
+    <pre class="mermaid">
+    classDiagram
+        class BaseService &LT;&LT;abstract&GT;&GT; &LT;&LT;injectable&GT;&GT;
+        class UserService &LT;&LT;service&GT;&GT; &LT;&LT;singleton&GT;&GT;
+        class UserRepository &LT;&LT;repository&GT;&GT; &LT;&LT;cached&GT;&GT;
+        class UserController
+        &LT;&LT;controller&GT;&GT; &LT;&LT;secured&GT;&GT; UserController
+        
+        BaseService <|-- UserService
+        UserService --> UserRepository
+        UserController --> UserService
+    </pre>
+
+    <script type="module">
+      import mermaid from './mermaid.esm.mjs';
+      mermaid.initialize({
+        startOnLoad: true,
+        theme: 'default',
+        logLevel: 'debug',
+      });
+    </script>
+  </body>
+</html>

docs/syntax/classDiagram.md

@@ -21,7 +21,7 @@ title: Animal example
 classDiagram
     note "From Duck till Zebra"
     Animal <|-- Duck
-    note for Duck "can fly\ncan swim\ncan dive\ncan help in debugging"
+    note for Duck "can fly<br>can swim<br>can dive<br>can help in debugging"
     Animal <|-- Fish
     Animal <|-- Zebra
     Animal : +int age
@@ -50,7 +50,7 @@ title: Animal example
 classDiagram
     note "From Duck till Zebra"
     Animal <|-- Duck
-    note for Duck "can fly\ncan swim\ncan dive\ncan help in debugging"
+    note for Duck "can fly<br>can swim<br>can dive<br>can help in debugging"
     Animal <|-- Fish
     Animal <|-- Zebra
     Animal : +int age
@@ -79,7 +79,7 @@ classDiagram
 UML provides mechanisms to represent class members, such as attributes and methods, and additional information about them.
 A single instance of a class in the diagram contains three compartments:
 
-- The top compartment contains the name of the class. It is printed in bold and centered, and the first letter is capitalized. It may also contain optional annotation text describing the nature of the class.
+- The top compartment contains the name of the class. It is printed in bold and centered, and the first letter is capitalized. It may also contain optional annotation/stereotype text describing the nature of the class.
 - The middle compartment contains the attributes of the class. They are left-aligned and the first letter is lowercase.
 - The bottom compartment contains the operations the class can execute. They are also left-aligned and the first letter is lowercase.
 
@@ -534,7 +534,7 @@ classDiagram
     Galaxy --> "many" Star : Contains
 ```
 
-## Annotations on classes
+## Annotations on classes (stereotypes)
 
 It is possible to annotate classes with markers to provide additional metadata about the class. This can give a clearer indication about its nature. Some common annotations include:
 
@@ -543,57 +543,33 @@ It is possible to annotate classes with markers to provide additional metadata a
 - `<<Service>>` To represent a service class
 - `<<Enumeration>>` To represent an enum
 
-Annotations are defined within the opening `<<` and closing `>>`. There are two ways to add an annotation to a class, and either way the output will be same:
+Annotations are defined within the opening `<<` and closing `>>`. There are multiple ways to add an annotation to a class, and any of them will output the same result:
 
-> **Tip:**\
-> In Mermaid class diagrams, annotations like `<<interface>>` can be attached in two ways:
->
-> - **Inline with the class definition** (Recommended for consistency):
->
->   ```mermaid-example
->   classDiagram
->     class Shape <<interface>>
->   ```
->
->   ```mermaid
->   classDiagram
->     class Shape <<interface>>
->   ```
->
-> - **Separate line after the class definition**:
->
->   ```mermaid-example
->   classDiagram
->     class Shape
->     <<interface>> Shape
->   ```
->
->   ```mermaid
->   classDiagram
->     class Shape
->     <<interface>> Shape
->   ```
->
-> Both methods are fully supported and produce identical diagrams.\
-> However, it is recommended to use the **inline style** for better readability and consistent formatting across diagrams.
+- **Inline with the class definition** (Recommended for consistency):
 
-- In a **_separate line_** after a class is defined:
+  ```mermaid-example
+  classDiagram
+    class Shape <<interface>>
+  ```
 
-```mermaid-example
-classDiagram
-class Shape
-<<interface>> Shape
-Shape : noOfVertices
-Shape : draw()
-```
+  ```mermaid
+  classDiagram
+    class Shape <<interface>>
+  ```
 
-```mermaid
-classDiagram
-class Shape
-<<interface>> Shape
-Shape : noOfVertices
-Shape : draw()
-```
+- **Separate line after the class definition**:
+
+  ```mermaid-example
+  classDiagram
+    class Shape
+    <<interface>> Shape
+  ```
+
+  ```mermaid
+  classDiagram
+    class Shape
+    <<interface>> Shape
+  ```
 
 - In a **_nested structure_** along with the class definition:
 
@@ -633,6 +609,30 @@ class Color{
 
 ```
 
+For the case of multiple annotations the syntax is similar, you can add other annotations on the same line, or in a nested class definition add an annotation on a new line, as follows:
+
+```mermaid-example
+classDiagram
+class Shape{
+    <<interface>>
+    <<injected>>
+    noOfVertices
+    draw()
+}
+
+```
+
+```mermaid
+classDiagram
+class Shape{
+    <<interface>>
+    <<injected>>
+    noOfVertices
+    draw()
+}
+
+```
+
 ## Comments
 
 Comments can be entered within a class diagram, which will be ignored by the parser. Comments need to be on their own line, and must be prefaced with `%%` (double percent signs). Any text until the next newline will be treated as a comment, including any class diagram syntax.

docs/syntax/sequenceDiagram.md

@@ -329,7 +329,11 @@ Messages can be of two displayed either solid or with a dotted line.
 [Actor][Arrow][Actor]:Message text
 ```
 
-There are ten types of arrows currently supported:
+Lines can be solid or dotted, and can end with various types of arrowheads, crosses, or open arrows.
+
+#### Supported Arrow Types
+
+**Standard Arrow Types**
 
 | Type     | Description                                          |
 | -------- | ---------------------------------------------------- |
@@ -344,6 +348,58 @@ There are ten types of arrows currently supported:
 | `-)`     | Solid line with an open arrow at the end (async)     |
 | `--)`    | Dotted line with a open arrow at the end (async)     |
 
+**Half-Arrows (v\<MERMAID_RELEASE_VERSION>+)**
+
+The following half-arrow types are supported for more expressive sequence diagrams. Both solid and dotted variants are available by increasing the number of dashes (`-` → `--`).
+
+---
+
+| Type    | Description                                          |
+| ------- | ---------------------------------------------------- |
+| `-\|\`  | Solid line with top half arrowhead                   |
+| `--\|\` | Dotted line with top half arrowhead                  |
+| `-\|/`  | Solid line with bottom half arrowhead                |
+| `--\|/` | Dotted line with bottom half arrowhead               |
+| `/\|-`  | Solid line with reverse top half arrowhead           |
+| `/\|--` | Dotted line with reverse top half arrowhead          |
+| `\\-`   | Solid line with reverse bottom half arrowhead        |
+| `\\--`  | Dotted line with reverse bottom half arrowhead       |
+| `-\\`   | Solid line with top stick half arrowhead             |
+| `--\\`  | Dotted line with top stick half arrowhead            |
+| `-//`   | Solid line with bottom stick half arrowhead          |
+| `--//`  | Dotted line with bottom stick half arrowhead         |
+| `//-`   | Solid line with reverse top stick half arrowhead     |
+| `//--`  | Dotted line with reverse top stick half arrowhead    |
+| `\\-`   | Solid line with reverse bottom stick half arrowhead  |
+| `\\--`  | Dotted line with reverse bottom stick half arrowhead |
+
+## Central Connections (v\<MERMAID_RELEASE_VERSION>+)
+
+Mermaid sequence diagrams support **central lifeline connections** using a `()`.
+This is useful to represent messages or signals that connect to a central point, rather than from one actor directly to another.
+
+To indicate a central connection, append `()` to the arrow syntax.
+
+#### Basic Syntax
+
+```mermaid-example
+sequenceDiagram
+    participant Alice
+    participant John
+    Alice->>()John: Hello John
+    Alice()->>John: How are you?
+    John()->>()Alice: Great!
+```
+
+```mermaid
+sequenceDiagram
+    participant Alice
+    participant John
+    Alice->>()John: Hello John
+    Alice()->>John: How are you?
+    John()->>()Alice: Great!
+```
+
 ## Activations
 
 It is possible to activate and deactivate an actor. (de)activation can be dedicated declarations:

package.json

@@ -63,12 +63,12 @@
     ]
   },
   "devDependencies": {
-    "@applitools/eyes-cypress": "^3.44.9",
-    "@argos-ci/cypress": "^6.1.1",
+    "@applitools/eyes-cypress": "^3.55.2",
+    "@argos-ci/cypress": "^6.1.3",
     "@changesets/changelog-github": "^0.5.1",
-    "@changesets/cli": "^2.27.12",
+    "@changesets/cli": "^2.29.7",
     "@cspell/eslint-plugin": "^8.19.4",
-    "@cypress/code-coverage": "^3.12.49",
+    "@cypress/code-coverage": "^3.14.6",
     "@eslint/js": "^9.26.0",
     "@rollup/plugin-typescript": "^12.1.4",
     "@types/cors": "^2.8.19",
@@ -77,22 +77,22 @@
     "@types/jsdom": "^21.1.7",
     "@types/lodash": "^4.17.20",
     "@types/mdast": "^4.0.4",
-    "@types/node": "^22.13.17",
+    "@types/node": "^22.18.6",
     "@types/rollup-plugin-visualizer": "^5.0.3",
-    "@vitest/coverage-v8": "^3.0.9",
-    "@vitest/spy": "^3.0.9",
-    "@vitest/ui": "^3.0.9",
+    "@vitest/coverage-v8": "^3.2.4",
+    "@vitest/spy": "^3.2.4",
+    "@vitest/ui": "^3.2.4",
     "ajv": "^8.17.1",
     "chokidar": "3.6.0",
-    "concurrently": "^9.1.2",
+    "concurrently": "^9.2.1",
     "cors": "^2.8.5",
     "cpy-cli": "^5.0.0",
     "cross-env": "^7.0.3",
-    "cspell": "^9.1.5",
+    "cspell": "^9.2.1",
     "cypress": "^14.5.4",
     "cypress-image-snapshot": "^4.0.1",
-    "cypress-split": "^1.24.21",
-    "esbuild": "^0.25.9",
+    "cypress-split": "^1.24.23",
+    "esbuild": "^0.25.10",
     "eslint": "^9.26.0",
     "eslint-config-prettier": "^10.1.8",
     "eslint-plugin-cypress": "^4.3.0",
@@ -106,10 +106,10 @@
     "eslint-plugin-tsdoc": "^0.4.0",
     "eslint-plugin-unicorn": "^59.0.1",
     "express": "^5.1.0",
-    "globals": "^16.0.0",
+    "globals": "^16.4.0",
     "globby": "^14.1.0",
     "husky": "^9.1.7",
-    "jest": "^30.0.5",
+    "jest": "^30.1.3",
     "jison": "^0.4.18",
     "js-yaml": "^4.1.0",
     "jsdom": "^26.1.0",
@@ -118,18 +118,18 @@
     "markdown-table": "^3.0.4",
     "nyc": "^17.1.0",
     "path-browserify": "^1.0.1",
-    "prettier": "^3.5.3",
+    "prettier": "^3.6.2",
     "prettier-plugin-jsdoc": "^1.3.3",
     "rimraf": "^6.0.1",
     "rollup-plugin-visualizer": "^6.0.3",
-    "start-server-and-test": "^2.0.13",
+    "start-server-and-test": "^2.1.2",
     "tslib": "^2.8.1",
-    "tsx": "^4.7.3",
+    "tsx": "^4.20.5",
     "typescript": "~5.7.3",
     "typescript-eslint": "^8.38.0",
-    "vite": "^7.0.6",
+    "vite": "^7.0.7",
     "vite-plugin-istanbul": "^7.0.0",
-    "vitest": "^3.0.9"
+    "vitest": "^3.2.4"
   },
   "nyc": {
     "report-dir": "coverage/cypress"

packages/mermaid-example-diagram/package.json

@@ -42,7 +42,7 @@
     "khroma": "^2.1.0"
   },
   "devDependencies": {
-    "concurrently": "^9.1.2",
+    "concurrently": "^9.2.1",
     "mermaid": "workspace:*",
     "rimraf": "^6.0.1"
   },

packages/mermaid-layout-elk/src/render.ts

@@ -67,7 +67,22 @@ export const render = async (
 
     // Add the element to the DOM
     if (!node.isGroup) {
-      const child = node as NodeWithVertex;
+      // const child = node as NodeWithVertex;
+      const child: NodeWithVertex = {
+        id: node.id,
+        width: node.width,
+        height: node.height,
+        // Store the original node data for later use
+        label: node.label,
+        isGroup: node.isGroup,
+        shape: node.shape,
+        padding: node.padding,
+        cssClasses: node.cssClasses,
+        cssStyles: node.cssStyles,
+        look: node.look,
+        // Include parentId for subgraph processing
+        parentId: node.parentId,
+      };
       graph.children.push(child);
       nodeDb[node.id] = node;
 
@@ -150,7 +165,7 @@ export const render = async (
         domId: { node: () => any; attr: (arg0: string, arg1: string) => void };
       }) {
         if (node) {
-          nodeDb[node.id] = node;
+          nodeDb[node.id] ??= {};
           nodeDb[node.id].offset = {
             posX: node.x + relX,
             posY: node.y + relY,
@@ -860,11 +875,13 @@ export const render = async (
     log.info('APA01 layout result:', JSON.stringify(g, null, 2));
   } catch (error) {
     log.error('APA01 ELK layout error:', error);
+    log.error('APA01 elkGraph that caused error:', JSON.stringify(elkGraph, null, 2));
     throw error;
   }
 
   // debugger;
   await drawNodes(0, 0, g.children, svg, subGraphsEl, 0);
+
   g.edges?.map(
     (edge: {
       sources: (string | number)[];

packages/mermaid-zenuml/package.json

@@ -33,7 +33,7 @@
   ],
   "license": "MIT",
   "dependencies": {
-    "@zenuml/core": "^3.35.2"
+    "@zenuml/core": "^3.41.4"
   },
   "devDependencies": {
     "mermaid": "workspace:^"

packages/mermaid/CHANGELOG.md

@@ -1,24 +1,5 @@
 # mermaid
 
-## 11.12.0
-
-### Minor Changes
-
-- [#6921](https://github.com/mermaid-js/mermaid/pull/6921) [`764b315`](https://github.com/mermaid-js/mermaid/commit/764b315dc16d0359add7c6b8e3ef7592e9bdc09c) Thanks [@quilicicf](https://github.com/quilicicf)! - feat: Add IDs in architecture diagrams
-
-### Patch Changes
-
-- [#6950](https://github.com/mermaid-js/mermaid/pull/6950) [`a957908`](https://github.com/mermaid-js/mermaid/commit/a9579083bfba367a4f4678547ec37ed7b61b9f5b) Thanks [@shubhamparikh2704](https://github.com/shubhamparikh2704)! - chore: Fix mindmap rendering in docs and apply tidytree layout
-
-- [#6826](https://github.com/mermaid-js/mermaid/pull/6826) [`1d36810`](https://github.com/mermaid-js/mermaid/commit/1d3681053b9168354e48e5763023b6305cd1ca72) Thanks [@darshanr0107](https://github.com/darshanr0107)! - fix: Ensure edge label color is applied when using classDef with edge IDs
-
-- [#6945](https://github.com/mermaid-js/mermaid/pull/6945) [`d318f1a`](https://github.com/mermaid-js/mermaid/commit/d318f1a13cd7429334a29c70e449074ec1cb9f68) Thanks [@darshanr0107](https://github.com/darshanr0107)! - fix: Resolve gantt chart crash due to invalid array length
-
-- [#6918](https://github.com/mermaid-js/mermaid/pull/6918) [`cfe9238`](https://github.com/mermaid-js/mermaid/commit/cfe9238882cbe95416db1feea3112456a71b6aaf) Thanks [@shubhamparikh2704](https://github.com/shubhamparikh2704)! - chore: revert marked dependency from ^15.0.7 to ^16.0.0
-  - Reverted marked package version to ^16.0.0 for better compatibility
-  - This is a dependency update that maintains API compatibility
-  - All tests pass with the updated version
-
 ## 11.11.0
 
 ### Minor Changes

packages/mermaid/package.json

@@ -1,6 +1,6 @@
 {
   "name": "mermaid",
-  "version": "11.12.0",
+  "version": "11.11.0",
   "description": "Markdown-ish syntax for generating flowcharts, mindmaps, sequence diagrams, class diagrams, gantt charts, git graphs and more.",
   "type": "module",
   "module": "./dist/mermaid.core.mjs",
@@ -68,10 +68,10 @@
   },
   "dependencies": {
     "@braintree/sanitize-url": "^7.1.1",
-    "@iconify/utils": "^3.0.1",
+    "@iconify/utils": "^3.0.2",
     "@mermaid-js/parser": "workspace:^",
     "@types/d3": "^7.4.3",
-    "cytoscape": "^3.29.3",
+    "cytoscape": "^3.33.1",
     "cytoscape-cose-bilkent": "^4.1.0",
     "cytoscape-fcose": "^2.2.0",
     "d3": "^7.9.0",
@@ -82,7 +82,7 @@
     "katex": "^0.16.22",
     "khroma": "^2.1.0",
     "lodash-es": "^4.17.21",
-    "marked": "^16.2.1",
+    "marked": "^16.3.0",
     "roughjs": "^4.6.6",
     "stylis": "^4.3.6",
     "ts-dedent": "^2.2.0",
@@ -105,9 +105,9 @@
     "@types/stylis": "^4.2.7",
     "@types/uuid": "^10.0.0",
     "ajv": "^8.17.1",
-    "canvas": "^3.1.2",
+    "canvas": "^3.2.0",
     "chokidar": "3.6.0",
-    "concurrently": "^9.1.2",
+    "concurrently": "^9.2.1",
     "csstree-validator": "^4.0.1",
     "globby": "^14.1.0",
     "jison": "^0.4.18",
@@ -116,14 +116,14 @@
     "json-schema-to-typescript": "^15.0.4",
     "micromatch": "^4.0.8",
     "path-browserify": "^1.0.1",
-    "prettier": "^3.5.3",
+    "prettier": "^3.6.2",
     "remark": "^15.0.1",
     "remark-frontmatter": "^5.0.0",
     "remark-gfm": "^4.0.1",
     "rimraf": "^6.0.1",
-    "start-server-and-test": "^2.0.13",
-    "type-fest": "^4.35.0",
-    "typedoc": "^0.28.12",
+    "start-server-and-test": "^2.1.2",
+    "type-fest": "^4.41.0",
+    "typedoc": "^0.28.13",
     "typedoc-plugin-markdown": "^4.8.1",
     "typescript": "~5.7.3",
     "unist-util-flatmap": "^1.0.0",

packages/mermaid/src/diagrams/class/classDb.ts

@@ -237,6 +237,7 @@ export class ClassDB implements DiagramDB {
    * @public
    */
   public addAnnotation(className: string, annotation: string) {
+    this.addClass(className);
     const validatedClassName = this.splitClassNameAndType(className).className;
     this.classes.get(validatedClassName)!.annotations.push(annotation);
   }
@@ -627,7 +628,7 @@ export class ClassDB implements DiagramDB {
           padding: config.class!.padding ?? 16,
           // parent node must be one of [rect, roundedWithTitle, noteGroup, divider]
           shape: 'rect',
-          cssStyles: ['fill: none', 'stroke: black'],
+          cssStyles: [],
           look: config.look,
         };
         nodes.push(node);

packages/mermaid/src/diagrams/class/classDiagram.spec.ts

@@ -241,6 +241,31 @@ describe('given a basic class diagram, ', function () {
       expect(c1.annotations[0]).toBe('interface');
     });
 
+    it('should handle multiple external annotations', () => {
+      const str = `classDiagram
+        <<interface>><<service>> Car
+        Car : int size
+        Car : int age`;
+
+      parser.parse(str);
+      const carClass = classDb.getClass('Car');
+      expect(carClass.annotations).toHaveLength(2);
+      expect(carClass.annotations).toContain('interface');
+      expect(carClass.annotations).toContain('service');
+    });
+
+    it('should handle multiple annotations inline with class definition', () => {
+      const str = `classDiagram
+        class Car <<interface>> <<service>>
+        Car : int size`;
+
+      parser.parse(str);
+      const carClass = classDb.getClass('Car');
+      expect(carClass.annotations).toHaveLength(2);
+      expect(carClass.annotations).toContain('interface');
+      expect(carClass.annotations).toContain('service');
+    });
+
     it('should parse a class with text label and css class shorthand', () => {
       const str = 'classDiagram\n' + 'class C1["Class 1 with text label"]:::styleClass';
 
@@ -922,6 +947,28 @@ foo()
       expect(actual.methods.length).toBe(1);
       expect(actual.annotations[0]).toBe('interface');
     });
+
+    it('should handle multiple consecutive annotations on a single class', function () {
+      const str = 'classDiagram\n' + '<<interface>><<injected>> Class1';
+
+      parser.parse(str);
+
+      const actual = parser.yy.getClass('Class1');
+      expect(actual.annotations.length).toBe(2);
+      expect(actual.annotations).toContain('interface');
+      expect(actual.annotations).toContain('injected');
+    });
+
+    it('should handle multiple separate annotations on a single class', function () {
+      const str = 'classDiagram\n' + '<<interface>> Class1\n' + '<<injected>> Class1';
+
+      parser.parse(str);
+
+      const actual = parser.yy.getClass('Class1');
+      expect(actual.annotations.length).toBe(2);
+      expect(actual.annotations).toContain('interface');
+      expect(actual.annotations).toContain('injected');
+    });
   });
 });
 

packages/mermaid/src/diagrams/class/classTypes.attribute.spec.ts

@@ -0,0 +1,317 @@
+import { ClassMember } from './classTypes.js';
+import { vi, describe, it, expect } from 'vitest';
+const spyOn = vi.spyOn;
+
+const staticCssStyle = 'text-decoration:underline;';
+const abstractCssStyle = 'font-style:italic;';
+const abstractStaticCssStyle = 'text-decoration:underline;font-style:italic;';
+
+describe('ClassTypes - Attribute Tests', () => {
+  describe('Basic attribute parsing without classifiers', () => {
+    it('should parse attribute with no modifiers', () => {
+      const str = 'name String';
+      const displayDetails = new ClassMember(str, 'attribute').getDisplayDetails();
+
+      expect(displayDetails.displayText).toBe('name String');
+      expect(displayDetails.cssStyle).toBe('');
+    });
+
+    it('should parse attribute with public "+" visibility', () => {
+      const str = '+name String';
+      const displayDetails = new ClassMember(str, 'attribute').getDisplayDetails();
+
+      expect(displayDetails.displayText).toBe('+name String');
+      expect(displayDetails.cssStyle).toBe('');
+    });
+
+    it('should parse attribute with protected "#" visibility', () => {
+      const str = '#name String';
+      const displayDetails = new ClassMember(str, 'attribute').getDisplayDetails();
+
+      expect(displayDetails.displayText).toBe('#name String');
+      expect(displayDetails.cssStyle).toBe('');
+    });
+
+    it('should parse attribute with private "-" visibility', () => {
+      const str = '-name String';
+      const displayDetails = new ClassMember(str, 'attribute').getDisplayDetails();
+
+      expect(displayDetails.displayText).toBe('-name String');
+      expect(displayDetails.cssStyle).toBe('');
+    });
+
+    it('should parse attribute with internal "~" visibility', () => {
+      const str = '~name String';
+      const displayDetails = new ClassMember(str, 'attribute').getDisplayDetails();
+
+      expect(displayDetails.displayText).toBe('~name String');
+      expect(displayDetails.cssStyle).toBe('');
+    });
+
+    it('should parse simple attribute name only', () => {
+      const str = 'id';
+      const displayDetails = new ClassMember(str, 'attribute').getDisplayDetails();
+
+      expect(displayDetails.displayText).toBe('id');
+      expect(displayDetails.cssStyle).toBe('');
+    });
+
+    it('should parse attribute with visibility and name only', () => {
+      const str = '+id';
+      const displayDetails = new ClassMember(str, 'attribute').getDisplayDetails();
+
+      expect(displayDetails.displayText).toBe('+id');
+      expect(displayDetails.cssStyle).toBe('');
+    });
+  });
+
+  describe('Static classifier ($) attributes', () => {
+    it('should parse static attribute without visibility', () => {
+      const str = 'count int$';
+      const displayDetails = new ClassMember(str, 'attribute').getDisplayDetails();
+
+      expect(displayDetails.displayText).toBe('count int');
+      expect(displayDetails.cssStyle).toBe(staticCssStyle);
+    });
+
+    it('should parse static attribute with public visibility', () => {
+      const str = '+count int$';
+      const displayDetails = new ClassMember(str, 'attribute').getDisplayDetails();
+
+      expect(displayDetails.displayText).toBe('+count int');
+      expect(displayDetails.cssStyle).toBe(staticCssStyle);
+    });
+
+    it('should parse static attribute with protected visibility', () => {
+      const str = '#count int$';
+      const displayDetails = new ClassMember(str, 'attribute').getDisplayDetails();
+
+      expect(displayDetails.displayText).toBe('#count int');
+      expect(displayDetails.cssStyle).toBe(staticCssStyle);
+    });
+
+    it('should parse static attribute with private visibility', () => {
+      const str = '-count int$';
+      const displayDetails = new ClassMember(str, 'attribute').getDisplayDetails();
+
+      expect(displayDetails.displayText).toBe('-count int');
+      expect(displayDetails.cssStyle).toBe(staticCssStyle);
+    });
+
+    it('should parse static attribute with internal visibility', () => {
+      const str = '~count int$';
+      const displayDetails = new ClassMember(str, 'attribute').getDisplayDetails();
+
+      expect(displayDetails.displayText).toBe('~count int');
+      expect(displayDetails.cssStyle).toBe(staticCssStyle);
+    });
+
+    it('should parse static attribute name only', () => {
+      const str = 'MAX_SIZE$';
+      const displayDetails = new ClassMember(str, 'attribute').getDisplayDetails();
+
+      expect(displayDetails.displayText).toBe('MAX_SIZE');
+      expect(displayDetails.cssStyle).toBe(staticCssStyle);
+    });
+  });
+
+  describe('Abstract classifier (*) attributes', () => {
+    it('should parse abstract attribute without visibility', () => {
+      const str = 'data String*';
+      const displayDetails = new ClassMember(str, 'attribute').getDisplayDetails();
+
+      expect(displayDetails.displayText).toBe('data String');
+      expect(displayDetails.cssStyle).toBe(abstractCssStyle);
+    });
+
+    it('should parse abstract attribute with public visibility', () => {
+      const str = '+data String*';
+      const displayDetails = new ClassMember(str, 'attribute').getDisplayDetails();
+
+      expect(displayDetails.displayText).toBe('+data String');
+      expect(displayDetails.cssStyle).toBe(abstractCssStyle);
+    });
+
+    it('should parse abstract attribute with protected visibility', () => {
+      const str = '#data String*';
+      const displayDetails = new ClassMember(str, 'attribute').getDisplayDetails();
+
+      expect(displayDetails.displayText).toBe('#data String');
+      expect(displayDetails.cssStyle).toBe(abstractCssStyle);
+    });
+
+    it('should parse abstract attribute with private visibility', () => {
+      const str = '-data String*';
+      const displayDetails = new ClassMember(str, 'attribute').getDisplayDetails();
+
+      expect(displayDetails.displayText).toBe('-data String');
+      expect(displayDetails.cssStyle).toBe(abstractCssStyle);
+    });
+
+    it('should parse abstract attribute with internal visibility', () => {
+      const str = '~data String*';
+      const displayDetails = new ClassMember(str, 'attribute').getDisplayDetails();
+
+      expect(displayDetails.displayText).toBe('~data String');
+      expect(displayDetails.cssStyle).toBe(abstractCssStyle);
+    });
+
+    it('should parse abstract attribute name only', () => {
+      const str = 'value*';
+      const displayDetails = new ClassMember(str, 'attribute').getDisplayDetails();
+
+      expect(displayDetails.displayText).toBe('value');
+      expect(displayDetails.cssStyle).toBe(abstractCssStyle);
+    });
+  });
+
+  describe('Abstract and Static combined classifiers', () => {
+    it('should parse abstract+static ($*) attribute without visibility', () => {
+      const str = 'config Map$*';
+      const displayDetails = new ClassMember(str, 'attribute').getDisplayDetails();
+
+      expect(displayDetails.displayText).toBe('config Map');
+      expect(displayDetails.cssStyle).toBe(abstractStaticCssStyle);
+    });
+
+    it('should parse static+abstract (*$) attribute without visibility', () => {
+      const str = 'config Map*$';
+      const displayDetails = new ClassMember(str, 'attribute').getDisplayDetails();
+
+      expect(displayDetails.displayText).toBe('config Map');
+      expect(displayDetails.cssStyle).toBe(abstractStaticCssStyle);
+    });
+
+    it('should parse abstract+static ($*) attribute with public visibility', () => {
+      const str = '+config Map$*';
+      const displayDetails = new ClassMember(str, 'attribute').getDisplayDetails();
+
+      expect(displayDetails.displayText).toBe('+config Map');
+      expect(displayDetails.cssStyle).toBe(abstractStaticCssStyle);
+    });
+
+    it('should parse static+abstract (*$) attribute with public visibility', () => {
+      const str = '+config Map*$';
+      const displayDetails = new ClassMember(str, 'attribute').getDisplayDetails();
+
+      expect(displayDetails.displayText).toBe('+config Map');
+      expect(displayDetails.cssStyle).toBe(abstractStaticCssStyle);
+    });
+
+    it('should parse abstract+static ($*) attribute with protected visibility', () => {
+      const str = '#registry HashMap$*';
+      const displayDetails = new ClassMember(str, 'attribute').getDisplayDetails();
+
+      expect(displayDetails.displayText).toBe('#registry HashMap');
+      expect(displayDetails.cssStyle).toBe(abstractStaticCssStyle);
+    });
+
+    it('should parse static+abstract (*$) attribute with protected visibility', () => {
+      const str = '#registry HashMap*$';
+      const displayDetails = new ClassMember(str, 'attribute').getDisplayDetails();
+
+      expect(displayDetails.displayText).toBe('#registry HashMap');
+      expect(displayDetails.cssStyle).toBe(abstractStaticCssStyle);
+    });
+
+    it('should parse abstract+static ($*) attribute with private visibility', () => {
+      const str = '-cache LRUCache$*';
+      const displayDetails = new ClassMember(str, 'attribute').getDisplayDetails();
+
+      expect(displayDetails.displayText).toBe('-cache LRUCache');
+      expect(displayDetails.cssStyle).toBe(abstractStaticCssStyle);
+    });
+
+    it('should parse static+abstract (*$) attribute with private visibility', () => {
+      const str = '-cache LRUCache*$';
+      const displayDetails = new ClassMember(str, 'attribute').getDisplayDetails();
+
+      expect(displayDetails.displayText).toBe('-cache LRUCache');
+      expect(displayDetails.cssStyle).toBe(abstractStaticCssStyle);
+    });
+
+    it('should parse abstract+static ($*) attribute with internal visibility', () => {
+      const str = '~pool ThreadPool$*';
+      const displayDetails = new ClassMember(str, 'attribute').getDisplayDetails();
+
+      expect(displayDetails.displayText).toBe('~pool ThreadPool');
+      expect(displayDetails.cssStyle).toBe(abstractStaticCssStyle);
+    });
+
+    it('should parse static+abstract (*$) attribute with internal visibility', () => {
+      const str = '~pool ThreadPool*$';
+      const displayDetails = new ClassMember(str, 'attribute').getDisplayDetails();
+
+      expect(displayDetails.displayText).toBe('~pool ThreadPool');
+      expect(displayDetails.cssStyle).toBe(abstractStaticCssStyle);
+    });
+
+    it('should parse abstract+static ($*) attribute name only', () => {
+      const str = 'INSTANCE$*';
+      const displayDetails = new ClassMember(str, 'attribute').getDisplayDetails();
+
+      expect(displayDetails.displayText).toBe('INSTANCE');
+      expect(displayDetails.cssStyle).toBe(abstractStaticCssStyle);
+    });
+
+    it('should parse static+abstract (*$) attribute name only', () => {
+      const str = 'INSTANCE*$';
+      const displayDetails = new ClassMember(str, 'attribute').getDisplayDetails();
+
+      expect(displayDetails.displayText).toBe('INSTANCE');
+      expect(displayDetails.cssStyle).toBe(abstractStaticCssStyle);
+    });
+  });
+
+  describe('Complex attribute type scenarios', () => {
+    it('should parse generic type attribute with static classifier', () => {
+      const str = '+items List~String~$';
+      const displayDetails = new ClassMember(str, 'attribute').getDisplayDetails();
+
+      expect(displayDetails.displayText).toBe('+items List<String>');
+      expect(displayDetails.cssStyle).toBe(staticCssStyle);
+    });
+
+    it('should parse nested generic type attribute with abstract classifier', () => {
+      const str = '#mapping Map~String, List~Integer~~*';
+      const displayDetails = new ClassMember(str, 'attribute').getDisplayDetails();
+
+      expect(displayDetails.displayText).toBe('#mapping Map~String, List<Integer~>');
+      expect(displayDetails.cssStyle).toBe(abstractCssStyle);
+    });
+
+    it('should parse complex generic type with abstract+static classifiers', () => {
+      const str = '+factory Function~Map~String, Object~, Promise~Result~~$*';
+      const displayDetails = new ClassMember(str, 'attribute').getDisplayDetails();
+
+      expect(displayDetails.displayText).toBe(
+        '+factory Function<Map>String, Object~, Promise<Result~>'
+      );
+      expect(displayDetails.cssStyle).toBe(abstractStaticCssStyle);
+    });
+
+    it('should parse attribute with spaces in type name', () => {
+      const str = '+fullName Full Name String$';
+      const displayDetails = new ClassMember(str, 'attribute').getDisplayDetails();
+
+      expect(displayDetails.displayText).toBe('+fullName Full Name String');
+      expect(displayDetails.cssStyle).toBe(staticCssStyle);
+    });
+
+    it('should parse attribute with special characters in name', () => {
+      const str = '+user_name String*';
+      const displayDetails = new ClassMember(str, 'attribute').getDisplayDetails();
+
+      expect(displayDetails.displayText).toBe('+user_name String');
+      expect(displayDetails.cssStyle).toBe(abstractCssStyle);
+    });
+
+    it('should parse attribute with numeric suffix', () => {
+      const str = '-value123 int$*';
+      const displayDetails = new ClassMember(str, 'attribute').getDisplayDetails();
+
+      expect(displayDetails.displayText).toBe('-value123 int');
+      expect(displayDetails.cssStyle).toBe(abstractStaticCssStyle);
+    });
+  });
+});

packages/mermaid/src/diagrams/class/classTypes.method.spec.ts

@@ -0,0 +1,827 @@
+import { ClassMember } from './classTypes.js';
+import { vi, describe, it, expect } from 'vitest';
+const spyOn = vi.spyOn;
+
+const staticCssStyle = 'text-decoration:underline;';
+const abstractCssStyle = 'font-style:italic;';
+const abstractStaticCssStyle = 'text-decoration:underline;font-style:italic;';
+
+describe('given text representing a method, ', function () {
+  describe('when method has no parameters', function () {
+    it('should parse correctly', function () {
+      const str = `getTime()`;
+
+      const classMember = new ClassMember(str, 'method');
+      expect(classMember.getDisplayDetails().displayText).toBe(str);
+    });
+
+    it('should handle public visibility', function () {
+      const str = `+getTime()`;
+
+      const classMember = new ClassMember(str, 'method');
+      expect(classMember.getDisplayDetails().displayText).toBe('+getTime()');
+    });
+
+    it('should handle private visibility', function () {
+      const str = `-getTime()`;
+
+      const classMember = new ClassMember(str, 'method');
+      expect(classMember.getDisplayDetails().displayText).toBe('-getTime()');
+    });
+
+    it('should handle protected visibility', function () {
+      const str = `#getTime()`;
+
+      const classMember = new ClassMember(str, 'method');
+      expect(classMember.getDisplayDetails().displayText).toBe('#getTime()');
+    });
+
+    it('should handle internal visibility', function () {
+      const str = `~getTime()`;
+
+      const classMember = new ClassMember(str, 'method');
+      expect(classMember.getDisplayDetails().displayText).toBe('~getTime()');
+    });
+  });
+
+  describe('when method has single parameter value', function () {
+    it('should parse correctly', function () {
+      const str = `getTime(int)`;
+
+      const classMember = new ClassMember(str, 'method');
+      expect(classMember.getDisplayDetails().displayText).toBe(str);
+    });
+
+    it('should handle public visibility', function () {
+      const str = `+getTime(int)`;
+
+      const classMember = new ClassMember(str, 'method');
+      expect(classMember.getDisplayDetails().displayText).toBe('+getTime(int)');
+    });
+
+    it('should handle private visibility', function () {
+      const str = `-getTime(int)`;
+
+      const classMember = new ClassMember(str, 'method');
+      expect(classMember.getDisplayDetails().displayText).toBe('-getTime(int)');
+    });
+
+    it('should handle protected visibility', function () {
+      const str = `#getTime(int)`;
+
+      const classMember = new ClassMember(str, 'method');
+      expect(classMember.getDisplayDetails().displayText).toBe('#getTime(int)');
+    });
+
+    it('should handle internal visibility', function () {
+      const str = `~getTime(int)`;
+
+      const classMember = new ClassMember(str, 'method');
+      expect(classMember.getDisplayDetails().displayText).toBe('~getTime(int)');
+    });
+
+    it('should return correct css for static classifier', function () {
+      const str = `getTime(int)$`;
+
+      const classMember = new ClassMember(str, 'method');
+      expect(classMember.getDisplayDetails().displayText).toBe('getTime(int)');
+      expect(classMember.getDisplayDetails().cssStyle).toBe(staticCssStyle);
+    });
+
+    it('should return correct css for abstract classifier', function () {
+      const str = `getTime(int)*`;
+
+      const classMember = new ClassMember(str, 'method');
+      expect(classMember.getDisplayDetails().displayText).toBe('getTime(int)');
+      expect(classMember.getDisplayDetails().cssStyle).toBe(abstractCssStyle);
+    });
+
+    it('should return correct css for abstract static classifier', function () {
+      const str = `getTime(int)*$`;
+
+      const classMember = new ClassMember(str, 'method');
+      expect(classMember.getDisplayDetails().displayText).toBe('getTime(int)');
+      expect(classMember.getDisplayDetails().cssStyle).toBe(abstractStaticCssStyle);
+    });
+
+    it('should return correct css for static abstract classifier', function () {
+      const str = `getTime(int)$*`;
+
+      const classMember = new ClassMember(str, 'method');
+      expect(classMember.getDisplayDetails().displayText).toBe('getTime(int)');
+      expect(classMember.getDisplayDetails().cssStyle).toBe(abstractStaticCssStyle);
+    });
+  });
+
+  describe('when method has single parameter type and name (type first)', function () {
+    it('should parse correctly', function () {
+      const str = `getTime(int count)`;
+
+      const classMember = new ClassMember(str, 'method');
+      expect(classMember.getDisplayDetails().displayText).toBe(str);
+    });
+
+    it('should handle public visibility', function () {
+      const str = `+getTime(int count)`;
+
+      const classMember = new ClassMember(str, 'method');
+      expect(classMember.getDisplayDetails().displayText).toBe('+getTime(int count)');
+    });
+
+    it('should handle private visibility', function () {
+      const str = `-getTime(int count)`;
+
+      const classMember = new ClassMember(str, 'method');
+      expect(classMember.getDisplayDetails().displayText).toBe('-getTime(int count)');
+    });
+
+    it('should handle protected visibility', function () {
+      const str = `#getTime(int count)`;
+
+      const classMember = new ClassMember(str, 'method');
+      expect(classMember.getDisplayDetails().displayText).toBe('#getTime(int count)');
+    });
+
+    it('should handle internal visibility', function () {
+      const str = `~getTime(int count)`;
+
+      const classMember = new ClassMember(str, 'method');
+      expect(classMember.getDisplayDetails().displayText).toBe('~getTime(int count)');
+    });
+
+    it('should return correct css for static classifier', function () {
+      const str = `getTime(int count)$`;
+
+      const classMember = new ClassMember(str, 'method');
+      expect(classMember.getDisplayDetails().displayText).toBe('getTime(int count)');
+      expect(classMember.getDisplayDetails().cssStyle).toBe(staticCssStyle);
+    });
+
+    it('should return correct css for abstract classifier', function () {
+      const str = `getTime(int count)*`;
+
+      const classMember = new ClassMember(str, 'method');
+      expect(classMember.getDisplayDetails().displayText).toBe('getTime(int count)');
+      expect(classMember.getDisplayDetails().cssStyle).toBe(abstractCssStyle);
+    });
+
+    it('should return correct css for abstract static classifier', function () {
+      const str = `getTime(int count)*$`;
+
+      const classMember = new ClassMember(str, 'method');
+      expect(classMember.getDisplayDetails().displayText).toBe('getTime(int count)');
+      expect(classMember.getDisplayDetails().cssStyle).toBe(abstractStaticCssStyle);
+    });
+
+    it('should return correct css for static abstract classifier', function () {
+      const str = `getTime(int count)$*`;
+
+      const classMember = new ClassMember(str, 'method');
+      expect(classMember.getDisplayDetails().displayText).toBe('getTime(int count)');
+      expect(classMember.getDisplayDetails().cssStyle).toBe(abstractStaticCssStyle);
+    });
+  });
+
+  describe('when method has single parameter type and name (name first)', function () {
+    it('should parse correctly', function () {
+      const str = `getTime(count int)`;
+
+      const classMember = new ClassMember(str, 'method');
+      expect(classMember.getDisplayDetails().displayText).toBe(str);
+    });
+
+    it('should handle public visibility', function () {
+      const str = `+getTime(count int)`;
+
+      const classMember = new ClassMember(str, 'method');
+      expect(classMember.getDisplayDetails().displayText).toBe('+getTime(count int)');
+    });
+
+    it('should handle private visibility', function () {
+      const str = `-getTime(count int)`;
+
+      const classMember = new ClassMember(str, 'method');
+      expect(classMember.getDisplayDetails().displayText).toBe('-getTime(count int)');
+    });
+
+    it('should handle protected visibility', function () {
+      const str = `#getTime(count int)`;
+
+      const classMember = new ClassMember(str, 'method');
+      expect(classMember.getDisplayDetails().displayText).toBe('#getTime(count int)');
+    });
+
+    it('should handle internal visibility', function () {
+      const str = `~getTime(count int)`;
+
+      const classMember = new ClassMember(str, 'method');
+      expect(classMember.getDisplayDetails().displayText).toBe('~getTime(count int)');
+    });
+
+    it('should return correct css for static classifier', function () {
+      const str = `getTime(count int)$`;
+
+      const classMember = new ClassMember(str, 'method');
+      expect(classMember.getDisplayDetails().displayText).toBe('getTime(count int)');
+      expect(classMember.getDisplayDetails().cssStyle).toBe(staticCssStyle);
+    });
+
+    it('should return correct css for abstract classifier', function () {
+      const str = `getTime(count int)*`;
+
+      const classMember = new ClassMember(str, 'method');
+      expect(classMember.getDisplayDetails().displayText).toBe('getTime(count int)');
+      expect(classMember.getDisplayDetails().cssStyle).toBe(abstractCssStyle);
+    });
+
+    it('should return correct css for abstract static classifier', function () {
+      const str = `getTime(count int)*$`;
+
+      const classMember = new ClassMember(str, 'method');
+      expect(classMember.getDisplayDetails().displayText).toBe('getTime(count int)');
+      expect(classMember.getDisplayDetails().cssStyle).toBe(abstractStaticCssStyle);
+    });
+
+    it('should return correct css for static abstract classifier', function () {
+      const str = `getTime(count int)$*`;
+
+      const classMember = new ClassMember(str, 'method');
+      expect(classMember.getDisplayDetails().displayText).toBe('getTime(count int)');
+      expect(classMember.getDisplayDetails().cssStyle).toBe(abstractStaticCssStyle);
+    });
+  });
+
+  describe('when method has multiple parameters', function () {
+    it('should parse correctly', function () {
+      const str = `getTime(string text, int count)`;
+
+      const classMember = new ClassMember(str, 'method');
+      expect(classMember.getDisplayDetails().displayText).toBe(str);
+    });
+
+    it('should handle public visibility', function () {
+      const str = `+getTime(string text, int count)`;
+
+      const classMember = new ClassMember(str, 'method');
+      expect(classMember.getDisplayDetails().displayText).toBe(str);
+    });
+
+    it('should handle private visibility', function () {
+      const str = `-getTime(string text, int count)`;
+
+      const classMember = new ClassMember(str, 'method');
+      expect(classMember.getDisplayDetails().displayText).toBe(str);
+    });
+
+    it('should handle protected visibility', function () {
+      const str = `#getTime(string text, int count)`;
+
+      const classMember = new ClassMember(str, 'method');
+      expect(classMember.getDisplayDetails().displayText).toBe(str);
+    });
+
+    it('should handle internal visibility', function () {
+      const str = `~getTime(string text, int count)`;
+
+      const classMember = new ClassMember(str, 'method');
+      expect(classMember.getDisplayDetails().displayText).toBe(str);
+    });
+
+    it('should return correct css for static classifier', function () {
+      const str = `getTime(string text, int count)$`;
+
+      const classMember = new ClassMember(str, 'method');
+      expect(classMember.getDisplayDetails().displayText).toBe('getTime(string text, int count)');
+      expect(classMember.getDisplayDetails().cssStyle).toBe(staticCssStyle);
+    });
+
+    it('should return correct css for abstract classifier', function () {
+      const str = `getTime(string text, int count)*`;
+
+      const classMember = new ClassMember(str, 'method');
+      expect(classMember.getDisplayDetails().displayText).toBe('getTime(string text, int count)');
+      expect(classMember.getDisplayDetails().cssStyle).toBe(abstractCssStyle);
+    });
+
+    it('should return correct css for abstract static classifier', function () {
+      const str = `getTime(string text, int count)*$`;
+
+      const classMember = new ClassMember(str, 'method');
+      expect(classMember.getDisplayDetails().displayText).toBe('getTime(string text, int count)');
+      expect(classMember.getDisplayDetails().cssStyle).toBe(abstractStaticCssStyle);
+    });
+
+    it('should return correct css for static abstract classifier', function () {
+      const str = `getTime(string text, int count)$*`;
+
+      const classMember = new ClassMember(str, 'method');
+      expect(classMember.getDisplayDetails().displayText).toBe('getTime(string text, int count)');
+      expect(classMember.getDisplayDetails().cssStyle).toBe(abstractStaticCssStyle);
+    });
+  });
+
+  describe('when method has return type', function () {
+    it('should parse correctly', function () {
+      const str = `getTime() DateTime`;
+
+      const classMember = new ClassMember(str, 'method');
+      expect(classMember.getDisplayDetails().displayText).toBe('getTime() : DateTime');
+    });
+
+    it('should handle public visibility', function () {
+      const str = `+getTime() DateTime`;
+
+      const classMember = new ClassMember(str, 'method');
+      expect(classMember.getDisplayDetails().displayText).toBe('+getTime() : DateTime');
+    });
+
+    it('should handle private visibility', function () {
+      const str = `-getTime() DateTime`;
+
+      const classMember = new ClassMember(str, 'method');
+      expect(classMember.getDisplayDetails().displayText).toBe('-getTime() : DateTime');
+    });
+
+    it('should handle protected visibility', function () {
+      const str = `#getTime() DateTime`;
+
+      const classMember = new ClassMember(str, 'method');
+      expect(classMember.getDisplayDetails().displayText).toBe('#getTime() : DateTime');
+    });
+
+    it('should handle internal visibility', function () {
+      const str = `~getTime() DateTime`;
+
+      const classMember = new ClassMember(str, 'method');
+      expect(classMember.getDisplayDetails().displayText).toBe('~getTime() : DateTime');
+    });
+
+    it('should return correct css for static classifier', function () {
+      const str = `getTime() DateTime$`;
+
+      const classMember = new ClassMember(str, 'method');
+      expect(classMember.getDisplayDetails().displayText).toBe('getTime() : DateTime');
+      expect(classMember.getDisplayDetails().cssStyle).toBe(staticCssStyle);
+    });
+
+    it('should return correct css for abstract classifier', function () {
+      const str = `getTime()  DateTime*`;
+
+      const classMember = new ClassMember(str, 'method');
+      expect(classMember.getDisplayDetails().displayText).toBe('getTime() : DateTime');
+      expect(classMember.getDisplayDetails().cssStyle).toBe(abstractCssStyle);
+    });
+
+    it('should return correct css for abstract static classifier', function () {
+      const str = `getTime()  DateTime*$`;
+
+      const classMember = new ClassMember(str, 'method');
+      expect(classMember.getDisplayDetails().displayText).toBe('getTime() : DateTime');
+      expect(classMember.getDisplayDetails().cssStyle).toBe(abstractStaticCssStyle);
+    });
+
+    it('should return correct css for static abstract classifier', function () {
+      const str = `getTime()  DateTime$*`;
+
+      const classMember = new ClassMember(str, 'method');
+      expect(classMember.getDisplayDetails().displayText).toBe('getTime() : DateTime');
+      expect(classMember.getDisplayDetails().cssStyle).toBe(abstractStaticCssStyle);
+    });
+  });
+
+  describe('when method parameter is generic', function () {
+    it('should parse correctly', function () {
+      const str = `getTimes(List~T~)`;
+
+      const classMember = new ClassMember(str, 'method');
+      expect(classMember.getDisplayDetails().displayText).toBe('getTimes(List<T>)');
+    });
+
+    it('should handle public visibility', function () {
+      const str = `+getTimes(List~T~)`;
+
+      const classMember = new ClassMember(str, 'method');
+      expect(classMember.getDisplayDetails().displayText).toBe('+getTimes(List<T>)');
+    });
+
+    it('should handle private visibility', function () {
+      const str = `-getTimes(List~T~)`;
+
+      const classMember = new ClassMember(str, 'method');
+      expect(classMember.getDisplayDetails().displayText).toBe('-getTimes(List<T>)');
+    });
+
+    it('should handle protected visibility', function () {
+      const str = `#getTimes(List~T~)`;
+
+      const classMember = new ClassMember(str, 'method');
+      expect(classMember.getDisplayDetails().displayText).toBe('#getTimes(List<T>)');
+    });
+
+    it('should handle internal visibility', function () {
+      const str = `~getTimes(List~T~)`;
+
+      const classMember = new ClassMember(str, 'method');
+      expect(classMember.getDisplayDetails().displayText).toBe('~getTimes(List<T>)');
+    });
+
+    it('should return correct css for static classifier', function () {
+      const str = `getTimes(List~T~)$`;
+
+      const classMember = new ClassMember(str, 'method');
+      expect(classMember.getDisplayDetails().displayText).toBe('getTimes(List<T>)');
+      expect(classMember.getDisplayDetails().cssStyle).toBe(staticCssStyle);
+    });
+
+    it('should return correct css for abstract classifier', function () {
+      const str = `getTimes(List~T~)*`;
+
+      const classMember = new ClassMember(str, 'method');
+      expect(classMember.getDisplayDetails().displayText).toBe('getTimes(List<T>)');
+      expect(classMember.getDisplayDetails().cssStyle).toBe(abstractCssStyle);
+    });
+
+    it('should return correct css for abstract static classifier', function () {
+      const str = `getTimes(List~T~)*$`;
+
+      const classMember = new ClassMember(str, 'method');
+      expect(classMember.getDisplayDetails().displayText).toBe('getTimes(List<T>)');
+      expect(classMember.getDisplayDetails().cssStyle).toBe(abstractStaticCssStyle);
+    });
+
+    it('should return correct css for static abstract classifier', function () {
+      const str = `getTimes(List~T~)$*`;
+
+      const classMember = new ClassMember(str, 'method');
+      expect(classMember.getDisplayDetails().displayText).toBe('getTimes(List<T>)');
+      expect(classMember.getDisplayDetails().cssStyle).toBe(abstractStaticCssStyle);
+    });
+  });
+
+  describe('when method parameter contains two generic', function () {
+    it('should parse correctly', function () {
+      const str = `getTimes(List~T~, List~OT~)`;
+
+      const classMember = new ClassMember(str, 'method');
+      expect(classMember.getDisplayDetails().displayText).toBe('getTimes(List<T>, List<OT>)');
+    });
+
+    it('should handle public visibility', function () {
+      const str = `+getTimes(List~T~, List~OT~)`;
+
+      const classMember = new ClassMember(str, 'method');
+      expect(classMember.getDisplayDetails().displayText).toBe('+getTimes(List<T>, List<OT>)');
+    });
+
+    it('should handle private visibility', function () {
+      const str = `-getTimes(List~T~, List~OT~)`;
+
+      const classMember = new ClassMember(str, 'method');
+      expect(classMember.getDisplayDetails().displayText).toBe('-getTimes(List<T>, List<OT>)');
+    });
+
+    it('should handle protected visibility', function () {
+      const str = `#getTimes(List~T~, List~OT~)`;
+
+      const classMember = new ClassMember(str, 'method');
+      expect(classMember.getDisplayDetails().displayText).toBe('#getTimes(List<T>, List<OT>)');
+    });
+
+    it('should handle internal visibility', function () {
+      const str = `~getTimes(List~T~, List~OT~)`;
+
+      const classMember = new ClassMember(str, 'method');
+      expect(classMember.getDisplayDetails().displayText).toBe('~getTimes(List<T>, List<OT>)');
+    });
+
+    it('should return correct css for static classifier', function () {
+      const str = `getTimes(List~T~, List~OT~)$`;
+
+      const classMember = new ClassMember(str, 'method');
+      expect(classMember.getDisplayDetails().displayText).toBe('getTimes(List<T>, List<OT>)');
+      expect(classMember.getDisplayDetails().cssStyle).toBe(staticCssStyle);
+    });
+
+    it('should return correct css for abstract classifier', function () {
+      const str = `getTimes(List~T~, List~OT~)*`;
+
+      const classMember = new ClassMember(str, 'method');
+      expect(classMember.getDisplayDetails().displayText).toBe('getTimes(List<T>, List<OT>)');
+      expect(classMember.getDisplayDetails().cssStyle).toBe(abstractCssStyle);
+    });
+
+    it('should return correct css for abstract static classifier', function () {
+      const str = `getTimes(List~T~, List~OT~)*$`;
+
+      const classMember = new ClassMember(str, 'method');
+      expect(classMember.getDisplayDetails().displayText).toBe('getTimes(List<T>, List<OT>)');
+      expect(classMember.getDisplayDetails().cssStyle).toBe(abstractStaticCssStyle);
+    });
+
+    it('should return correct css for static abstract classifier', function () {
+      const str = `getTimes(List~T~, List~OT~)$*`;
+
+      const classMember = new ClassMember(str, 'method');
+      expect(classMember.getDisplayDetails().displayText).toBe('getTimes(List<T>, List<OT>)');
+      expect(classMember.getDisplayDetails().cssStyle).toBe(abstractStaticCssStyle);
+    });
+  });
+
+  describe('when method parameter is a nested generic', function () {
+    it('should parse correctly', function () {
+      const str = `getTimetableList(List~List~T~~)`;
+
+      const classMember = new ClassMember(str, 'method');
+      expect(classMember.getDisplayDetails().displayText).toBe('getTimetableList(List<List<T>>)');
+    });
+
+    it('should handle public visibility', function () {
+      const str = `+getTimetableList(List~List~T~~)`;
+
+      const classMember = new ClassMember(str, 'method');
+      expect(classMember.getDisplayDetails().displayText).toBe('+getTimetableList(List<List<T>>)');
+    });
+
+    it('should handle private visibility', function () {
+      const str = `-getTimetableList(List~List~T~~)`;
+
+      const classMember = new ClassMember(str, 'method');
+      expect(classMember.getDisplayDetails().displayText).toBe('-getTimetableList(List<List<T>>)');
+    });
+
+    it('should handle protected visibility', function () {
+      const str = `#getTimetableList(List~List~T~~)`;
+
+      const classMember = new ClassMember(str, 'method');
+      expect(classMember.getDisplayDetails().displayText).toBe('#getTimetableList(List<List<T>>)');
+    });
+
+    it('should handle internal visibility', function () {
+      const str = `~getTimetableList(List~List~T~~)`;
+
+      const classMember = new ClassMember(str, 'method');
+      expect(classMember.getDisplayDetails().displayText).toBe('~getTimetableList(List<List<T>>)');
+    });
+
+    it('should return correct css for static classifier', function () {
+      const str = `getTimetableList(List~List~T~~)$`;
+
+      const classMember = new ClassMember(str, 'method');
+      expect(classMember.getDisplayDetails().displayText).toBe('getTimetableList(List<List<T>>)');
+      expect(classMember.getDisplayDetails().cssStyle).toBe(staticCssStyle);
+    });
+
+    it('should return correct css for abstract classifier', function () {
+      const str = `getTimetableList(List~List~T~~)*`;
+
+      const classMember = new ClassMember(str, 'method');
+      expect(classMember.getDisplayDetails().displayText).toBe('getTimetableList(List<List<T>>)');
+      expect(classMember.getDisplayDetails().cssStyle).toBe(abstractCssStyle);
+    });
+
+    it('should return correct css for abstract static classifier', function () {
+      const str = `getTimetableList(List~List~T~~)*$`;
+
+      const classMember = new ClassMember(str, 'method');
+      expect(classMember.getDisplayDetails().displayText).toBe('getTimetableList(List<List<T>>)');
+      expect(classMember.getDisplayDetails().cssStyle).toBe(abstractStaticCssStyle);
+    });
+
+    it('should return correct css for static abstract classifier', function () {
+      const str = `getTimetableList(List~List~T~~)$*`;
+
+      const classMember = new ClassMember(str, 'method');
+      expect(classMember.getDisplayDetails().displayText).toBe('getTimetableList(List<List<T>>)');
+      expect(classMember.getDisplayDetails().cssStyle).toBe(abstractStaticCssStyle);
+    });
+  });
+
+  describe('when method parameter is a composite generic', function () {
+    const methodNameAndParameters = 'getTimes(List~K, V~)';
+    const expectedMethodNameAndParameters = 'getTimes(List<K, V>)';
+    it('should parse correctly', function () {
+      const str = methodNameAndParameters;
+
+      const classMember = new ClassMember(str, 'method');
+      expect(classMember.getDisplayDetails().displayText).toBe(expectedMethodNameAndParameters);
+    });
+
+    it('should handle public visibility', function () {
+      const str = '+' + methodNameAndParameters;
+
+      const classMember = new ClassMember(str, 'method');
+      expect(classMember.getDisplayDetails().displayText).toBe(
+        '+' + expectedMethodNameAndParameters
+      );
+    });
+
+    it('should handle private visibility', function () {
+      const str = '-' + methodNameAndParameters;
+      const classMember = new ClassMember(str, 'method');
+      expect(classMember.getDisplayDetails().displayText).toBe(
+        '-' + expectedMethodNameAndParameters
+      );
+    });
+
+    it('should handle protected visibility', function () {
+      const str = '#' + methodNameAndParameters;
+      const classMember = new ClassMember(str, 'method');
+      expect(classMember.getDisplayDetails().displayText).toBe(
+        '#' + expectedMethodNameAndParameters
+      );
+    });
+
+    it('should handle internal visibility', function () {
+      const str = '~' + methodNameAndParameters;
+
+      const classMember = new ClassMember(str, 'method');
+      expect(classMember.getDisplayDetails().displayText).toBe(
+        '~' + expectedMethodNameAndParameters
+      );
+    });
+
+    it('should return correct css for static classifier', function () {
+      const str = methodNameAndParameters + '$';
+      const classMember = new ClassMember(str, 'method');
+      expect(classMember.getDisplayDetails().displayText).toBe(expectedMethodNameAndParameters);
+      expect(classMember.getDisplayDetails().cssStyle).toBe(staticCssStyle);
+    });
+
+    it('should return correct css for abstract classifier', function () {
+      const str = methodNameAndParameters + '*';
+      const classMember = new ClassMember(str, 'method');
+      expect(classMember.getDisplayDetails().displayText).toBe(expectedMethodNameAndParameters);
+      expect(classMember.getDisplayDetails().cssStyle).toBe(abstractCssStyle);
+    });
+
+    it('should return correct css for abstract static classifier', function () {
+      const str = methodNameAndParameters + '*$';
+      const classMember = new ClassMember(str, 'method');
+      expect(classMember.getDisplayDetails().displayText).toBe(expectedMethodNameAndParameters);
+      expect(classMember.getDisplayDetails().cssStyle).toBe(abstractStaticCssStyle);
+    });
+
+    it('should return correct css for static abstract classifier', function () {
+      const str = methodNameAndParameters + '$*';
+      const classMember = new ClassMember(str, 'method');
+      expect(classMember.getDisplayDetails().displayText).toBe(expectedMethodNameAndParameters);
+      expect(classMember.getDisplayDetails().cssStyle).toBe(abstractStaticCssStyle);
+    });
+  });
+
+  describe('when method return type is generic', function () {
+    it('should parse correctly', function () {
+      const str = `getTimes() List~T~`;
+
+      const classMember = new ClassMember(str, 'method');
+      expect(classMember.getDisplayDetails().displayText).toBe('getTimes() : List<T>');
+    });
+
+    it('should handle public visibility', function () {
+      const str = `+getTimes() List~T~`;
+
+      const classMember = new ClassMember(str, 'method');
+      expect(classMember.getDisplayDetails().displayText).toBe('+getTimes() : List<T>');
+    });
+
+    it('should handle private visibility', function () {
+      const str = `-getTimes() List~T~`;
+
+      const classMember = new ClassMember(str, 'method');
+      expect(classMember.getDisplayDetails().displayText).toBe('-getTimes() : List<T>');
+    });
+
+    it('should handle protected visibility', function () {
+      const str = `#getTimes() List~T~`;
+
+      const classMember = new ClassMember(str, 'method');
+      expect(classMember.getDisplayDetails().displayText).toBe('#getTimes() : List<T>');
+    });
+
+    it('should handle internal visibility', function () {
+      const str = `~getTimes() List~T~`;
+
+      const classMember = new ClassMember(str, 'method');
+      expect(classMember.getDisplayDetails().displayText).toBe('~getTimes() : List<T>');
+    });
+
+    it('should return correct css for static classifier', function () {
+      const str = `getTimes() List~T~$`;
+
+      const classMember = new ClassMember(str, 'method');
+      expect(classMember.getDisplayDetails().displayText).toBe('getTimes() : List<T>');
+      expect(classMember.getDisplayDetails().cssStyle).toBe(staticCssStyle);
+    });
+
+    it('should return correct css for abstract classifier', function () {
+      const str = `getTimes() List~T~*`;
+
+      const classMember = new ClassMember(str, 'method');
+      expect(classMember.getDisplayDetails().displayText).toBe('getTimes() : List<T>');
+      expect(classMember.getDisplayDetails().cssStyle).toBe(abstractCssStyle);
+    });
+
+    it('should return correct css for abstract static classifier', function () {
+      const str = `getTimes() List~T~*$`;
+
+      const classMember = new ClassMember(str, 'method');
+      expect(classMember.getDisplayDetails().displayText).toBe('getTimes() : List<T>');
+      expect(classMember.getDisplayDetails().cssStyle).toBe(abstractStaticCssStyle);
+    });
+
+    it('should return correct css for static abstract classifier', function () {
+      const str = `getTimes() List~T~$*`;
+
+      const classMember = new ClassMember(str, 'method');
+      expect(classMember.getDisplayDetails().displayText).toBe('getTimes() : List<T>');
+      expect(classMember.getDisplayDetails().cssStyle).toBe(abstractStaticCssStyle);
+    });
+  });
+
+  describe('when method return type is a nested generic', function () {
+    it('should parse correctly', function () {
+      const str = `getTimetableList() List~List~T~~`;
+
+      const classMember = new ClassMember(str, 'method');
+      expect(classMember.getDisplayDetails().displayText).toBe(
+        'getTimetableList() : List<List<T>>'
+      );
+    });
+
+    it('should handle public visibility', function () {
+      const str = `+getTimetableList() List~List~T~~`;
+
+      const classMember = new ClassMember(str, 'method');
+      expect(classMember.getDisplayDetails().displayText).toBe(
+        '+getTimetableList() : List<List<T>>'
+      );
+    });
+
+    it('should handle private visibility', function () {
+      const str = `-getTimetableList() List~List~T~~`;
+
+      const classMember = new ClassMember(str, 'method');
+      expect(classMember.getDisplayDetails().displayText).toBe(
+        '-getTimetableList() : List<List<T>>'
+      );
+    });
+
+    it('should handle protected visibility', function () {
+      const str = `#getTimetableList() List~List~T~~`;
+
+      const classMember = new ClassMember(str, 'method');
+      expect(classMember.getDisplayDetails().displayText).toBe(
+        '#getTimetableList() : List<List<T>>'
+      );
+    });
+
+    it('should handle internal visibility', function () {
+      const str = `~getTimetableList() List~List~T~~`;
+
+      const classMember = new ClassMember(str, 'method');
+      expect(classMember.getDisplayDetails().displayText).toBe(
+        '~getTimetableList() : List<List<T>>'
+      );
+    });
+
+    it('should return correct css for static classifier', function () {
+      const str = `getTimetableList() List~List~T~~$`;
+
+      const classMember = new ClassMember(str, 'method');
+      expect(classMember.getDisplayDetails().displayText).toBe(
+        'getTimetableList() : List<List<T>>'
+      );
+      expect(classMember.getDisplayDetails().cssStyle).toBe(staticCssStyle);
+    });
+
+    it('should return correct css for abstract classifier', function () {
+      const str = `getTimetableList() List~List~T~~*`;
+
+      const classMember = new ClassMember(str, 'method');
+      expect(classMember.getDisplayDetails().displayText).toBe(
+        'getTimetableList() : List<List<T>>'
+      );
+      expect(classMember.getDisplayDetails().cssStyle).toBe(abstractCssStyle);
+    });
+
+    it('should return correct css for abstract static classifier', function () {
+      const str = `getTimetableList() List~List~T~~*$`;
+
+      const classMember = new ClassMember(str, 'method');
+      expect(classMember.getDisplayDetails().displayText).toBe(
+        'getTimetableList() : List<List<T>>'
+      );
+      expect(classMember.getDisplayDetails().cssStyle).toBe(abstractStaticCssStyle);
+    });
+
+    it('should return correct css for static abstract classifier', function () {
+      const str = `getTimetableList() List~List~T~~$*`;
+
+      const classMember = new ClassMember(str, 'method');
+      expect(classMember.getDisplayDetails().displayText).toBe(
+        'getTimetableList() : List<List<T>>'
+      );
+      expect(classMember.getDisplayDetails().cssStyle).toBe(abstractStaticCssStyle);
+    });
+  });
+});

packages/mermaid/src/diagrams/class/parser/classDiagram.jison

@@ -82,8 +82,10 @@ Function arguments are optional: 'call <callback_name>()' simply executes 'callb
 <class-body><<EOF>>             return "EOF_IN_STRUCT";
 <class-body>"[*]"               { return 'EDGE_STATE';}
 <class-body>[{]                 return "OPEN_IN_STRUCT";
+<class-body>"<<"                return 'ANNOTATION_START';
+<class-body>">>"                return 'ANNOTATION_END';
 <class-body>[\n]                /* nothing */
-<class-body>[^{}\n]*            { return "MEMBER";}
+<class-body>[^{}<>\n]*          { return "MEMBER";}
 
 <*>"cssClass"                   return 'CSSCLASS';
 <*>"callback"                   return 'CALLBACK';
@@ -295,11 +297,21 @@ classStatement
     | classIdentifier STRUCT_START members STRUCT_STOP   {yy.addMembers($1,$3);}
     | classIdentifier STRUCT_START STRUCT_STOP           {}
     | classIdentifier STYLE_SEPARATOR alphaNumToken STRUCT_START members STRUCT_STOP {yy.setCssClass($1, $3);yy.addMembers($1,$5);}
+    | classIdentifier STRUCT_START NEWLINE annotationList members STRUCT_STOP   {for(const annotation of $4) { yy.addAnnotation($1, annotation); } yy.addMembers($1,$5);}
+    | classIdentifier STRUCT_START NEWLINE annotationList STRUCT_STOP           {for(const annotation of $4) { yy.addAnnotation($1, annotation); }}
+    | classIdentifier STRUCT_START annotationList members STRUCT_STOP   {for(const annotation of $3) { yy.addAnnotation($1, annotation); } yy.addMembers($1,$4);}
+    | classIdentifier STRUCT_START annotationList STRUCT_STOP           {for(const annotation of $3) { yy.addAnnotation($1, annotation); }}
+    | classIdentifier STYLE_SEPARATOR alphaNumToken STRUCT_START NEWLINE annotationList members STRUCT_STOP {yy.setCssClass($1, $3); for(const annotation of $6) { yy.addAnnotation($1, annotation); } yy.addMembers($1,$7);}
+    | classIdentifier STYLE_SEPARATOR alphaNumToken STRUCT_START NEWLINE annotationList STRUCT_STOP {yy.setCssClass($1, $3); for(const annotation of $6) { yy.addAnnotation($1, annotation); }}
+    | classIdentifier STYLE_SEPARATOR alphaNumToken STRUCT_START annotationList members STRUCT_STOP {yy.setCssClass($1, $3); for(const annotation of $5) { yy.addAnnotation($1, annotation); } yy.addMembers($1,$6);}
+    | classIdentifier STYLE_SEPARATOR alphaNumToken STRUCT_START annotationList STRUCT_STOP {yy.setCssClass($1, $3); for(const annotation of $5) { yy.addAnnotation($1, annotation); }}
     ;
 
 classIdentifier
     : CLASS className                                    {$$=$2; yy.addClass($2);}
     | CLASS className classLabel                         {$$=$2; yy.addClass($2);yy.setClassLabel($2, $3);}
+    | CLASS className annotationList                     {$$=$2; yy.addClass($2); for(const annotation of $3) { yy.addAnnotation($2, annotation); }}
+    | CLASS className classLabel annotationList          {$$=$2; yy.addClass($2);yy.setClassLabel($2, $3); for(const annotation of $4) { yy.addAnnotation($2, annotation); }}
     ;
 
 
@@ -310,7 +322,12 @@ emptyBody
     ;
 
 annotationStatement
-    : ANNOTATION_START alphaNumToken ANNOTATION_END className  { yy.addAnnotation($4,$2); }
+    : annotationList className  { for(const annotation of $1) { yy.addAnnotation($2, annotation); } }
+    ;
+
+annotationList
+    : ANNOTATION_START alphaNumToken ANNOTATION_END { $$ = [$2]; }
+    | annotationList ANNOTATION_START alphaNumToken ANNOTATION_END { $1.push($3); $$ = $1; }
     ;
 
 members

packages/mermaid/src/diagrams/class/shapeUtil.ts

@@ -36,8 +36,36 @@ export async function textHelper<T extends SVGGraphicsElement>(
 
   annotationGroup = shapeSvg.insert('g').attr('class', 'annotation-group text');
   if (node.annotations.length > 0) {
-    const annotation = node.annotations[0];
-    await addText(annotationGroup, { text: `«${annotation}»` } as unknown as ClassMember, 0);
+    let yOffset = 0;
+    const annotationElements: any[] = [];
+    let maxAnnotationWidth = 0;
+
+    // First pass: create all annotation elements and find the maximum width
+    for (const annotation of node.annotations) {
+      const annotationEl = annotationGroup.insert('g').attr('class', 'annotation-text');
+      const height = await addText(
+        annotationEl,
+        { text: `«${annotation}»` } as unknown as ClassMember,
+        0
+      );
+      const annotationBBox = annotationEl.node()!.getBBox();
+
+      annotationElements.push({
+        element: annotationEl,
+        width: annotationBBox.width,
+        height: height,
+        yOffset: yOffset,
+      });
+
+      maxAnnotationWidth = Math.max(maxAnnotationWidth, annotationBBox.width);
+      yOffset += height + TEXT_PADDING;
+    }
+
+    // Second pass: center each annotation relative to the maximum width
+    for (const annotation of annotationElements) {
+      const centerOffset = (maxAnnotationWidth - annotation.width) / 2;
+      annotation.element.attr('transform', `translate(${centerOffset}, ${annotation.yOffset})`);
+    }
 
     const annotationGroupBBox = annotationGroup.node()!.getBBox();
     annotationGroupHeight = annotationGroupBBox.height;

packages/mermaid/src/diagrams/class/styles.js

@@ -13,6 +13,30 @@ const getStyles = (options) =>
 
 }
 
+  .cluster-label text {
+    fill: ${options.titleColor};
+  }
+  .cluster-label span {
+    color: ${options.titleColor};
+  }
+  .cluster-label span p {
+    background-color: transparent;
+  }
+
+  .cluster rect {
+    fill: ${options.clusterBkg};
+    stroke: ${options.clusterBorder};
+    stroke-width: 1px;
+  }
+
+  .cluster text {
+    fill: ${options.titleColor};
+  }
+
+  .cluster span {
+    color: ${options.titleColor};
+  }
+
 .nodeLabel, .edgeLabel {
   color: ${options.classText};
 }

packages/mermaid/src/diagrams/er/parser/erDiagram.jison

@@ -66,12 +66,15 @@ accDescr\s*"{"\s*                                { this.begin("acc_descr_multili
 \}\|                            return 'ONE_OR_MORE';
 "one"                           return 'ONLY_ONE';
 "only one"                      return 'ONLY_ONE';
-"1"                             return 'ONLY_ONE';
+[0-9]+\.[0-9]+                  return 'DECIMAL_NUM';
+"1"(?=\s+[A-Za-z_"'])           return 'ONLY_ONE';
+"1"                             return 'ENTITY_ONE';
+[0-9]+                          return 'NUM';
 \|\|                            return 'ONLY_ONE';
 o\|                             return 'ZERO_OR_ONE';
 o\{                             return 'ZERO_OR_MORE';
 \|\{                            return 'ONE_OR_MORE';
-\s*u                            return 'MD_PARENT';
+u(?=[\.\-\|])                   return 'MD_PARENT';
 \.\.                            return 'NON_IDENTIFYING';
 \-\-                            return 'IDENTIFYING';
 "to"                            return 'IDENTIFYING';
@@ -80,13 +83,15 @@ o\{                             return 'ZERO_OR_MORE';
 \-\.                            return 'NON_IDENTIFYING';
 <style>([^\x00-\x7F]|\w|\-|\*)+ return 'STYLE_TEXT';
 <style>';'                      return 'SEMI';
-([^\x00-\x7F]|\w|\-|\*)+        return 'UNICODE_TEXT';
-[0-9]                           return 'NUM';
+([^\x00-\x7F]|\w|\-|\*|\.)+      return 'UNICODE_TEXT';
 .                               return yytext[0];
 <<EOF>>                         return 'EOF';
 
 /lex
 
+%left 'ONLY_ONE'
+%left 'ZERO_OR_ONE' 'ZERO_OR_MORE' 'ONE_OR_MORE' 'MD_PARENT'
+
 %start start
 %% /* language grammar */
 
@@ -228,6 +233,9 @@ styleComponent: STYLE_TEXT | NUM | COLON | BRKT;
 entityName
     : 'ENTITY_NAME'      { $$ = $1.replace(/"/g, ''); }
     | 'UNICODE_TEXT' { $$ = $1; }
+    | 'NUM' { $$ = $1; }
+    | 'DECIMAL_NUM' { $$ = $1; }
+    | 'ENTITY_ONE' { $$ = $1; }
     ;
 
 attributes

packages/mermaid/src/diagrams/er/parser/erDiagram.spec.js

@@ -1001,4 +1001,90 @@ describe('when parsing ER diagram it...', function () {
       }
     );
   });
+
+  describe('syntax fixes for special characters and numbers', function () {
+    describe('standalone entity names', function () {
+      it('should allow number "1" as standalone entity', function () {
+        erDiagram.parser.parse(`erDiagram\nCUSTOMER }|..|{ DELIVERY-ADDRESS : has\n1`);
+      });
+
+      it('should allow character "u" as standalone entity', function () {
+        erDiagram.parser.parse(`erDiagram\nCUSTOMER }|..|{ DELIVERY-ADDRESS : has\nu`);
+      });
+
+      it('should allow decimal numbers as standalone entities', function () {
+        erDiagram.parser.parse(`erDiagram\nCUSTOMER }|..|{ DELIVERY-ADDRESS : has\n2.5`);
+        erDiagram.parser.parse(`erDiagram\nCUSTOMER }|..|{ DELIVERY-ADDRESS : has\n1.5`);
+        erDiagram.parser.parse(`erDiagram\nCUSTOMER }|..|{ DELIVERY-ADDRESS : has\n0.1`);
+        erDiagram.parser.parse(`erDiagram\nCUSTOMER }|..|{ DELIVERY-ADDRESS : has\n99.99`);
+      });
+    });
+
+    describe('entity names with attributes', function () {
+      it('should allow "u" as entity name with attributes', function () {
+        erDiagram.parser.parse(`erDiagram\nu {\nstring name\nint id\n}`);
+      });
+
+      it('should allow number "1" as entity name with attributes', function () {
+        erDiagram.parser.parse(`erDiagram\n1 {\nstring name\nint id\n}`);
+      });
+
+      it('should allow decimal numbers as entity names with attributes', function () {
+        erDiagram.parser.parse(`erDiagram\n2.5 {\nstring name\nint id\n}`);
+        erDiagram.parser.parse(`erDiagram\n1.5 {\nstring value\n}`);
+      });
+    });
+
+    describe('entity names in relationships', function () {
+      it('should allow "u" in relationships', function () {
+        erDiagram.parser.parse(`erDiagram\nCUSTOMER ||--|| u : has`);
+        erDiagram.parser.parse(`erDiagram\nu ||--|| ORDER : places`);
+        erDiagram.parser.parse(`erDiagram\nu ||--|| v : connects`);
+      });
+
+      it('should allow numbers in relationships', function () {
+        erDiagram.parser.parse(`erDiagram\nCUSTOMER ||--|| 1 : has`);
+        erDiagram.parser.parse(`erDiagram\n1 ||--|| ORDER : places`);
+        erDiagram.parser.parse(`erDiagram\n1 ||--|| 2 : connects`);
+      });
+
+      it('should allow decimal numbers in relationships', function () {
+        erDiagram.parser.parse(`erDiagram\nCUSTOMER ||--|| 2.5 : has`);
+        erDiagram.parser.parse(`erDiagram\n1.5 ||--|| ORDER : places`);
+        erDiagram.parser.parse(`erDiagram\n2.5 ||--|| 5.5 : connects`);
+      });
+    });
+
+    describe('mixed scenarios', function () {
+      it('should handle complex diagram with special entity names', function () {
+        erDiagram.parser.parse(
+          `erDiagram
+              CUSTOMER ||--o{ 1 : places
+              1 ||--|{ u : contains
+              u {
+                string name
+                int quantity
+              }
+              "2.5" ||--|| ORDER : processes
+              ORDER {
+                int id
+                date created
+              }
+        `
+        );
+      });
+
+      it('should handle attributes with numbers in names (but not starting)', function () {
+        erDiagram.parser.parse(
+          `erDiagram
+              ENTITY {
+                string name1
+                int value2
+                float point3_5
+              }
+        `
+        );
+      });
+    });
+  });
 });

packages/mermaid/src/diagrams/flowchart/parser/flow.jison

@@ -140,6 +140,7 @@ that id.
 .*direction\s+BT[^\n]*       return 'direction_bt';
 .*direction\s+RL[^\n]*       return 'direction_rl';
 .*direction\s+LR[^\n]*       return 'direction_lr';
+.*direction\s+TD[^\n]*       return 'direction_td';
 
 [^\s\"]+\@(?=[^\{\"])               { return 'LINK_ID'; }
 [0-9]+                       return 'NUM';
@@ -626,6 +627,8 @@ direction
     { $$={stmt:'dir', value:'RL'};}
     | direction_lr
     { $$={stmt:'dir', value:'LR'};}
+    | direction_td
+    { $$={stmt:'dir', value:'TD'};}
     ;
 
 %%

packages/mermaid/src/diagrams/flowchart/parser/subgraph.spec.js

@@ -309,4 +309,21 @@ describe('when parsing subgraphs', function () {
     expect(subgraphA.nodes).toContain('a');
     expect(subgraphA.nodes).not.toContain('c');
   });
+  it('should correctly parse direction TD inside a subgraph', function () {
+    const res = flow.parser.parse(`
+      graph LR
+        subgraph WithTD
+          direction TD
+          A1 --> A2
+        end
+    `);
+
+    const subgraphs = flow.parser.yy.getSubGraphs();
+    expect(subgraphs.length).toBe(1);
+    const subgraph = subgraphs[0];
+
+    expect(subgraph.dir).toBe('TD');
+    expect(subgraph.nodes).toContain('A1');
+    expect(subgraph.nodes).toContain('A2');
+  });
 });

packages/mermaid/src/diagrams/sequence/parser/sequenceDiagram.jison

@@ -32,13 +32,14 @@
 <CONFIG>[^\}]+                                                  { return 'CONFIG_CONTENT'; }
 <CONFIG>\}                                                      { this.popState(); this.popState(); return 'CONFIG_END'; }
 <ID>[^\<->\->:\n,;@\s]+(?=\@\{)                                 { yytext = yytext.trim(); return 'ACTOR'; }
-<ID>[^\<->\->:\n,;@]+?([\-]*[^\<->\->:\n,;@]+?)*?(?=((?!\n)\s)+"as"(?!\n)\s|[#\n;]|$) { yytext = yytext.trim(); this.begin('ALIAS'); return 'ACTOR'; }
+<ID>[^<>:\n,;@\s]+(?=\s+as\s)                                   { yytext = yytext.trim(); this.begin('ALIAS'); return 'ACTOR'; }
+<ID>[^<>:\n,;@]+(?=\s*[\n;#]|$)                                 { yytext = yytext.trim(); this.popState(); return 'ACTOR'; }
+<ID>[^<>:\n,;@]*\<[^\n]*                                        { this.popState(); return 'INVALID'; }
 "box"															{ this.begin('LINE'); return 'box'; }
 "participant"                                                   { this.begin('ID'); return 'participant'; }
 "actor"                                                   		{ this.begin('ID'); return 'participant_actor'; }
 "create"                                                        return 'create';
 "destroy"                                                       { this.begin('ID'); return 'destroy'; }
-<ID>[^<\->\->:\n,;]+?([\-]*[^<\->\->:\n,;]+?)*?(?=((?!\n)\s)+"as"(?!\n)\s|[#\n;]|$)     { yytext = yytext.trim(); this.begin('ALIAS'); return 'ACTOR'; }
 <ALIAS>"as"                                                     { this.popState(); this.popState(); this.begin('LINE'); return 'AS'; }
 <ALIAS>(?:)                                                     { this.popState(); this.popState(); return 'NEWLINE'; }
 "loop"                                                          { this.begin('LINE'); return 'loop'; }
@@ -78,7 +79,7 @@ accDescr\s*"{"\s*                                { this.begin("acc_descr_multili
 "off"															return 'off';
 ","                                                             return ',';
 ";"                                                             return 'NEWLINE';
-[^+<\->\->:\n,;]+((?!(\-x|\-\-x|\-\)|\-\-\)))[\-]*[^\+<\->\->:\n,;]+)*             { yytext = yytext.trim(); return 'ACTOR'; }
+[^\/\\\+\()\+<\->\->:\n,;]+((?!(\-x|\-\-x|\-\)|\-\-\)|\-\|\\|\-\\|\-\/|\-\/\/|\-\|\/|\/\|\-|\\\|\-|\/\/\-|\\\\\-|\/\|\-|\-\-\|\\|\-\-|\(\)))[\-]*[^\+<\->\->:\n,;]+)*             { yytext = yytext.trim(); return 'ACTOR'; } //final_4.11
 "->>"                                                           return 'SOLID_ARROW';
 "<<->>"                                                           return 'BIDIRECTIONAL_SOLID_ARROW';
 "-->>"                                                          return 'DOTTED_ARROW';
@@ -89,10 +90,36 @@ accDescr\s*"{"\s*                                { this.begin("acc_descr_multili
 \-\-[x]                                                         return 'DOTTED_CROSS';
 \-[\)]                                                          return 'SOLID_POINT';
 \-\-[\)]                                                        return 'DOTTED_POINT';
+
+//normal-dotted
+\-\-\|\\                                                        return 'SOLID_ARROW_TOP_DOTTED';
+\-\-\|\/                                                        return 'SOLID_ARROW_BOTTOM_DOTTED';
+\-\-\\\\                                                        return 'STICK_ARROW_TOP_DOTTED';
+\-\-\/\/                                                        return 'STICK_ARROW_BOTTOM_DOTTED';
+
+//reverse-dotted
+\/\|\-\-                                                          return 'SOLID_ARROW_TOP_REVERSE_DOTTED';
+\\\|\-\-                                                          return 'SOLID_ARROW_BOTTOM_REVERSE_DOTTED';
+\/\/\-\-                                                          return 'STICK_ARROW_TOP_REVERSE_DOTTED';
+\\\\\-\-                                                          return 'STICK_ARROW_BOTTOM_REVERSE_DOTTED';
+
+//normal
+\-\|\\                                                          return 'SOLID_ARROW_TOP';
+\-\|\/                                                          return 'SOLID_ARROW_BOTTOM';
+\-\\\\                                                          return 'STICK_ARROW_TOP';
+\-\/\/                                                          return 'STICK_ARROW_BOTTOM';
+
+//reverse
+\/\|\-                                                          return 'SOLID_ARROW_TOP_REVERSE';
+\\\|\-                                                          return 'SOLID_ARROW_BOTTOM_REVERSE';
+\/\/\-                                                          return 'STICK_ARROW_TOP_REVERSE';
+\\\\\-                                                          return 'STICK_ARROW_BOTTOM_REVERSE';
+
 ":"(?:(?:no)?wrap:)?[^#\n;]*                                    return 'TXT';
 ":"                             								return 'TXT';
 "+"                                                             return '+';
 "-"                                                             return '-';
+"()"                                                            return '()';
 <<EOF>>                                                         return 'NEWLINE';
 .                                                               return 'INVALID';
 
@@ -119,6 +146,7 @@ line
 	: SPACE statement { $$ = $2 }
 	| statement { $$ = $1 }
 	| NEWLINE { $$=[]; }
+	| INVALID { $$=[]; }
 	;
 
 box_section
@@ -304,6 +332,20 @@ signal
 	{ $$ = [$1,$4,{type: 'addMessage', from:$1.actor, to:$4.actor, signalType:$2, msg:$5},
 	             {type: 'activeEnd', signalType: yy.LINETYPE.ACTIVE_END, actor: $1.actor}
 	             ]}
+    | actor signaltype '()' actor text2
+	{ $$ = [$1,$4,{type: 'addMessage', from:$1.actor, to:$4.actor, signalType:$2, msg:$5, activate: true, centralConnection: yy.LINETYPE.CENTRAL_CONNECTION},
+	              {type: 'centralConnection', signalType: yy.LINETYPE.CENTRAL_CONNECTION, actor: $4.actor, }
+	             ]}
+    
+	| actor '()' signaltype actor text2
+	{ $$ = [$1,$4,{type: 'addMessage', from:$1.actor, to:$4.actor, signalType:$3, msg:$5, activate: false, centralConnection: yy.LINETYPE.CENTRAL_CONNECTION_REVERSE},
+	              {type: 'centralConnectionReverse', signalType: yy.LINETYPE.CENTRAL_CONNECTION_REVERSE, actor: $1.actor}
+	             ]}
+	| actor '()' signaltype '()' actor text2
+	{ $$ = [$1,$5,{type: 'addMessage', from:$1.actor, to:$5.actor, signalType:$3, msg:$6, activate: true, centralConnection: yy.LINETYPE.CENTRAL_CONNECTION_DUAL},
+	 			 {type: 'centralConnection', signalType: yy.LINETYPE.CENTRAL_CONNECTION, actor: $5.actor, },
+				 {type: 'centralConnectionReverse', signalType: yy.LINETYPE.CENTRAL_CONNECTION_REVERSE, actor: $1.actor}
+	             ]}
 	| actor signaltype actor text2
 	{ $$ = [$1,$3,{type: 'addMessage', from:$1.actor, to:$3.actor, signalType:$2, msg:$4}]}
 	;
@@ -337,7 +379,28 @@ signaltype
 	: SOLID_OPEN_ARROW  { $$ = yy.LINETYPE.SOLID_OPEN; }
 	| DOTTED_OPEN_ARROW { $$ = yy.LINETYPE.DOTTED_OPEN; }
 	| SOLID_ARROW       { $$ = yy.LINETYPE.SOLID; }
-	| BIDIRECTIONAL_SOLID_ARROW       { $$ = yy.LINETYPE.BIDIRECTIONAL_SOLID; }
+	
+	| SOLID_ARROW_TOP    { $$ = yy.LINETYPE.SOLID_TOP; }
+	| SOLID_ARROW_BOTTOM { $$ = yy.LINETYPE.SOLID_BOTTOM; }
+	| STICK_ARROW_TOP    { $$ = yy.LINETYPE.STICK_TOP; }
+	| STICK_ARROW_BOTTOM { $$ = yy.LINETYPE.STICK_BOTTOM; }
+
+	| SOLID_ARROW_TOP_DOTTED    { $$ = yy.LINETYPE.SOLID_TOP_DOTTED; }	
+	| SOLID_ARROW_BOTTOM_DOTTED { $$ = yy.LINETYPE.SOLID_BOTTOM_DOTTED; }
+	| STICK_ARROW_TOP_DOTTED    { $$ = yy.LINETYPE.STICK_TOP_DOTTED; }
+	| STICK_ARROW_BOTTOM_DOTTED { $$ = yy.LINETYPE.STICK_BOTTOM_DOTTED; }
+
+	| SOLID_ARROW_TOP_REVERSE    { $$ = yy.LINETYPE.SOLID_ARROW_TOP_REVERSE; }
+	| SOLID_ARROW_BOTTOM_REVERSE { $$ = yy.LINETYPE.SOLID_ARROW_BOTTOM_REVERSE; }
+	| STICK_ARROW_TOP_REVERSE    { $$ = yy.LINETYPE.STICK_ARROW_TOP_REVERSE; }
+	| STICK_ARROW_BOTTOM_REVERSE { $$ = yy.LINETYPE.STICK_ARROW_BOTTOM_REVERSE; }
+
+	| SOLID_ARROW_TOP_REVERSE_DOTTED    { $$ = yy.LINETYPE.SOLID_ARROW_TOP_REVERSE_DOTTED; }
+	| SOLID_ARROW_BOTTOM_REVERSE_DOTTED { $$ = yy.LINETYPE.SOLID_ARROW_BOTTOM_REVERSE_DOTTED; }
+	| STICK_ARROW_TOP_REVERSE_DOTTED    { $$ = yy.LINETYPE.STICK_ARROW_TOP_REVERSE_DOTTED; }
+	| STICK_ARROW_BOTTOM_REVERSE_DOTTED { $$ = yy.LINETYPE.STICK_ARROW_BOTTOM_REVERSE_DOTTED; }
+
+  | BIDIRECTIONAL_SOLID_ARROW       { $$ = yy.LINETYPE.BIDIRECTIONAL_SOLID; }
 	| DOTTED_ARROW      { $$ = yy.LINETYPE.DOTTED; }
 	| BIDIRECTIONAL_DOTTED_ARROW      { $$ = yy.LINETYPE.BIDIRECTIONAL_DOTTED; }
 	| SOLID_CROSS       { $$ = yy.LINETYPE.SOLID_CROSS; }
@@ -350,4 +413,4 @@ text2
   : TXT {$$ = yy.parseMessage($1.trim().substring(1)) }
   ;
 
-%%
+%%

packages/mermaid/src/diagrams/sequence/sequenceDb.ts

@@ -64,6 +64,30 @@ const LINETYPE = {
   PAR_OVER_START: 32,
   BIDIRECTIONAL_SOLID: 33,
   BIDIRECTIONAL_DOTTED: 34,
+
+  SOLID_TOP: 41,
+  SOLID_BOTTOM: 42,
+  STICK_TOP: 43,
+  STICK_BOTTOM: 44,
+
+  SOLID_ARROW_TOP_REVERSE: 45,
+  SOLID_ARROW_BOTTOM_REVERSE: 46,
+  STICK_ARROW_TOP_REVERSE: 47,
+  STICK_ARROW_BOTTOM_REVERSE: 48,
+
+  SOLID_TOP_DOTTED: 51,
+  SOLID_BOTTOM_DOTTED: 52,
+  STICK_TOP_DOTTED: 53,
+  STICK_BOTTOM_DOTTED: 54,
+
+  SOLID_ARROW_TOP_REVERSE_DOTTED: 55,
+  SOLID_ARROW_BOTTOM_REVERSE_DOTTED: 56,
+  STICK_ARROW_TOP_REVERSE_DOTTED: 57,
+  STICK_ARROW_BOTTOM_REVERSE_DOTTED: 58,
+
+  CENTRAL_CONNECTION: 59,
+  CENTRAL_CONNECTION_REVERSE: 60,
+  CENTRAL_CONNECTION_DUAL: 61,
 } as const;
 
 const ARROWTYPE = {
@@ -244,7 +268,8 @@ export class SequenceDB implements DiagramDB {
     idTo?: Message['to'],
     message?: { text: string; wrap: boolean },
     messageType?: number,
-    activate = false
+    activate = false,
+    centralConnection?: number
   ) {
     if (messageType === this.LINETYPE.ACTIVE_END) {
       const cnt = this.activationCount(idFrom ?? '');
@@ -271,6 +296,7 @@ export class SequenceDB implements DiagramDB {
       wrap: message?.wrap ?? this.autoWrap(),
       type: messageType,
       activate,
+      centralConnection: centralConnection ?? 0,
     });
     return true;
   }
@@ -563,6 +589,12 @@ export class SequenceDB implements DiagramDB {
         case 'activeStart':
           this.addSignal(param.actor, undefined, undefined, param.signalType);
           break;
+        case 'centralConnection':
+          this.addSignal(param.actor, undefined, undefined, param.signalType);
+          break;
+        case 'centralConnectionReverse':
+          this.addSignal(param.actor, undefined, undefined, param.signalType);
+          break;
         case 'activeEnd':
           this.addSignal(param.actor, undefined, undefined, param.signalType);
           break;
@@ -606,7 +638,14 @@ export class SequenceDB implements DiagramDB {
               this.state.records.lastDestroyed = undefined;
             }
           }
-          this.addSignal(param.from, param.to, param.msg, param.signalType, param.activate);
+          this.addSignal(
+            param.from,
+            param.to,
+            param.msg,
+            param.signalType,
+            param.activate,
+            param.centralConnection
+          );
           break;
         case 'boxStart':
           this.addBox(param.boxData);

packages/mermaid/src/diagrams/sequence/sequenceDiagram.spec.js

@@ -104,6 +104,7 @@ describe('more than one sequence diagram', () => {
       [
         {
           "activate": false,
+          "centralConnection": 0,
           "from": "Alice",
           "id": "0",
           "message": "Hello Bob, how are you?",
@@ -113,6 +114,7 @@ describe('more than one sequence diagram', () => {
         },
         {
           "activate": false,
+          "centralConnection": 0,
           "from": "Bob",
           "id": "1",
           "message": "I am good thanks!",
@@ -131,6 +133,7 @@ describe('more than one sequence diagram', () => {
       [
         {
           "activate": false,
+          "centralConnection": 0,
           "from": "Alice",
           "id": "0",
           "message": "Hello Bob, how are you?",
@@ -140,6 +143,7 @@ describe('more than one sequence diagram', () => {
         },
         {
           "activate": false,
+          "centralConnection": 0,
           "from": "Bob",
           "id": "1",
           "message": "I am good thanks!",
@@ -160,6 +164,7 @@ describe('more than one sequence diagram', () => {
       [
         {
           "activate": false,
+          "centralConnection": 0,
           "from": "Alice",
           "id": "0",
           "message": "Hello John, how are you?",
@@ -169,6 +174,7 @@ describe('more than one sequence diagram', () => {
         },
         {
           "activate": false,
+          "centralConnection": 0,
           "from": "John",
           "id": "1",
           "message": "I am good thanks!",
@@ -181,6 +187,254 @@ describe('more than one sequence diagram', () => {
   });
 });
 
+describe('Central Connection Parsing', () => {
+  describe('when parsing central connection syntax', () => {
+    it('should parse actor ()->>() actor syntax as CENTRAL_CONNECTION_DUAL', async () => {
+      const diagram = await Diagram.fromText(`
+        sequenceDiagram
+        participant Alice
+        participant Bob
+        Alice ()->>() Bob: Hello Bob, how are you?
+      `);
+
+      const messages = diagram.db.getMessages();
+      expect(messages).toHaveLength(3); // addMessage + centralConnection + centralConnectionReverse
+
+      // Find the actual message (type: 'addMessage')
+      const actualMessage = messages.find((msg) => msg.type !== undefined && msg.from && msg.to);
+      expect(actualMessage).toMatchObject({
+        from: 'Alice',
+        to: 'Bob',
+        message: 'Hello Bob, how are you?',
+        centralConnection: 61, // CENTRAL_CONNECTION_DUAL
+        activate: true,
+        type: 0, // SOLID (based on test output)
+      });
+    });
+
+    it('should parse actor ()-->>() actor syntax as CENTRAL_CONNECTION_DUAL', async () => {
+      const diagram = await Diagram.fromText(`
+        sequenceDiagram
+        participant Alice
+        participant Bob
+        Alice ()-->>() Bob: Hello Bob, how are you?
+      `);
+
+      const messages = diagram.db.getMessages();
+      expect(messages).toHaveLength(3); // addMessage + centralConnection + centralConnectionReverse
+
+      const actualMessage = messages.find((msg) => msg.type !== undefined && msg.from && msg.to);
+      expect(actualMessage).toMatchObject({
+        from: 'Alice',
+        to: 'Bob',
+        message: 'Hello Bob, how are you?',
+        centralConnection: 61, // CENTRAL_CONNECTION_DUAL
+        activate: true,
+        type: 1, // DOTTED (based on test output)
+      });
+    });
+
+    it('should parse actor ->>() actor syntax as CENTRAL_CONNECTION', async () => {
+      const diagram = await Diagram.fromText(`
+        sequenceDiagram
+        participant Alice
+        participant Bob
+        Alice ->>() Bob: Hello Bob, how are you?
+      `);
+
+      const messages = diagram.db.getMessages();
+      expect(messages).toHaveLength(2); // addMessage + centralConnection (no activation for this pattern)
+
+      const actualMessage = messages.find((msg) => msg.type !== undefined && msg.from && msg.to);
+      expect(actualMessage).toMatchObject({
+        from: 'Alice',
+        to: 'Bob',
+        message: 'Hello Bob, how are you?',
+        centralConnection: 59, // CENTRAL_CONNECTION
+        activate: true,
+        type: 0, // SOLID (based on actual parsing)
+      });
+    });
+
+    it('should parse actor ()-->> actor syntax as CENTRAL_CONNECTION_REVERSE', async () => {
+      const diagram = await Diagram.fromText(`
+        sequenceDiagram
+        participant Alice
+        participant Bob
+        Alice ()-->> Bob: Hello Bob, how are you?
+      `);
+
+      const messages = diagram.db.getMessages();
+      expect(messages).toHaveLength(2); // addMessage + centralConnectionReverse
+
+      const actualMessage = messages.find((msg) => msg.type !== undefined && msg.from && msg.to);
+      expect(actualMessage).toMatchObject({
+        from: 'Alice',
+        to: 'Bob',
+        message: 'Hello Bob, how are you?',
+        centralConnection: 60, // CENTRAL_CONNECTION_REVERSE
+        activate: false,
+        type: 1, // DOTTED (based on test output)
+      });
+    });
+
+    it('should parse actor ()->> actor syntax as CENTRAL_CONNECTION_REVERSE', async () => {
+      const diagram = await Diagram.fromText(`
+        sequenceDiagram
+        participant Alice
+        participant Bob
+        Alice ()->> Bob: Hello Bob, how are you?
+      `);
+
+      const messages = diagram.db.getMessages();
+      expect(messages).toHaveLength(2); // addMessage + centralConnectionReverse
+
+      const actualMessage = messages.find((msg) => msg.type !== undefined && msg.from && msg.to);
+      expect(actualMessage).toMatchObject({
+        from: 'Alice',
+        to: 'Bob',
+        message: 'Hello Bob, how are you?',
+        centralConnection: 60, // CENTRAL_CONNECTION_REVERSE
+        activate: false,
+        type: 0, // SOLID (based on test output)
+      });
+    });
+
+    it('should parse actor ()<<-->>() actor syntax as CENTRAL_CONNECTION_DUAL', async () => {
+      const diagram = await Diagram.fromText(`
+        sequenceDiagram
+        participant Alice
+        participant Bob
+        Alice ()<<-->>() Bob: Hello Bob, how are you?
+      `);
+
+      const messages = diagram.db.getMessages();
+      expect(messages).toHaveLength(3); // addMessage + centralConnection + centralConnectionReverse
+
+      const actualMessage = messages.find((msg) => msg.type !== undefined && msg.from && msg.to);
+      expect(actualMessage).toMatchObject({
+        from: 'Alice',
+        to: 'Bob',
+        message: 'Hello Bob, how are you?',
+        centralConnection: 61, // CENTRAL_CONNECTION_DUAL
+        activate: true,
+        type: 34, // BIDIRECTIONAL_DOTTED
+      });
+    });
+
+    it('should parse actor ()<<->>() actor syntax as CENTRAL_CONNECTION_DUAL', async () => {
+      const diagram = await Diagram.fromText(`
+        sequenceDiagram
+        participant Alice
+        participant Bob
+        Alice ()<<->>() Bob: Hello Bob, how are you?
+      `);
+
+      const messages = diagram.db.getMessages();
+      expect(messages).toHaveLength(3); // addMessage + centralConnection + centralConnectionReverse
+
+      const actualMessage = messages.find((msg) => msg.type !== undefined && msg.from && msg.to);
+      expect(actualMessage).toMatchObject({
+        from: 'Alice',
+        to: 'Bob',
+        message: 'Hello Bob, how are you?',
+        centralConnection: 61, // CENTRAL_CONNECTION_DUAL
+        activate: true,
+        type: 33, // BIDIRECTIONAL_SOLID
+      });
+    });
+
+    it('should handle multiple central connection types in one diagram', async () => {
+      const diagram = await Diagram.fromText(`
+        sequenceDiagram
+        participant Alice
+        participant Bob
+        participant Charlie
+        Alice ()->>() Bob: Message 1
+        Bob ()-->> Charlie: Message 2
+        Charlie ()<<-->>() Alice: Message 3
+      `);
+
+      const messages = diagram.db.getMessages();
+      expect(messages).toHaveLength(8); // 3 addMessages + 5 central connection markers
+
+      // Filter to get only the actual messages
+      const actualMessages = messages.filter((msg) => msg.type !== undefined && msg.from && msg.to);
+      expect(actualMessages).toHaveLength(3);
+
+      expect(actualMessages[0]).toMatchObject({
+        from: 'Alice',
+        to: 'Bob',
+        centralConnection: 61, // CENTRAL_CONNECTION_DUAL (()->>())
+      });
+
+      expect(actualMessages[1]).toMatchObject({
+        from: 'Bob',
+        to: 'Charlie',
+        centralConnection: 60, // CENTRAL_CONNECTION_REVERSE (()-->>)
+      });
+
+      expect(actualMessages[2]).toMatchObject({
+        from: 'Charlie',
+        to: 'Alice',
+        centralConnection: 61, // CENTRAL_CONNECTION_DUAL (()<<-->>())
+      });
+    });
+
+    it('should handle central connections with different arrow types', async () => {
+      const diagram = await Diagram.fromText(`
+        sequenceDiagram
+        participant Alice
+        participant Bob
+        Alice ()-x() Bob: Cross message
+        Alice ()--x() Bob: Dotted cross message
+      `);
+
+      const messages = diagram.db.getMessages();
+      expect(messages).toHaveLength(6); // 2 addMessages + 4 central connection markers
+
+      const actualMessages = messages.filter((msg) => msg.type !== undefined && msg.from && msg.to);
+      expect(actualMessages).toHaveLength(2);
+
+      expect(actualMessages[0]).toMatchObject({
+        from: 'Alice',
+        to: 'Bob',
+        centralConnection: 61, // CENTRAL_CONNECTION_DUAL (()-x())
+        type: 3, // SOLID_CROSS
+      });
+
+      expect(actualMessages[1]).toMatchObject({
+        from: 'Alice',
+        to: 'Bob',
+        centralConnection: 61, // CENTRAL_CONNECTION_DUAL (()--x())
+        type: 4, // DOTTED_CROSS
+      });
+    });
+
+    it('should not break existing parsing without central connections', async () => {
+      const diagram = await Diagram.fromText(`
+        sequenceDiagram
+        participant Alice
+        participant Bob
+        Alice ->> Bob: Normal message
+        Bob -->> Alice: Normal dotted message
+        Alice -x Bob: Normal cross message
+      `);
+
+      const messages = diagram.db.getMessages();
+      expect(messages).toHaveLength(3);
+
+      messages.forEach((msg) => {
+        expect(msg.centralConnection).toBe(0); // No central connection
+      });
+
+      expect(messages[0].type).toBe(0); // SOLID (based on actual parsing)
+      expect(messages[1].type).toBe(1); // DOTTED (based on actual parsing)
+      expect(messages[2].type).toBe(3); // SOLID_CROSS
+    });
+  });
+});
+
 describe('when parsing a sequenceDiagram', function () {
   let diagram;
   beforeEach(async function () {
@@ -2058,6 +2312,36 @@ Bob->>Alice:Got it!
     expect(messages[0].from).toBe('Alice');
     expect(messages[0].to).toBe('Bob');
   });
+
+  it('1 should parse ', async () => {
+    const diagram = await Diagram.fromText(`
+    sequenceDiagram
+    actor Bob
+    actor Alice
+        Bob -|\\ Alice: Hello Alice, how are you?
+        Bob -|/ Alice: Hello Alice, how are you?
+        Bob -// Alice: Hello Alice, how are you?
+        Bob -\\\\ Alice: Hello Alice, how are you?
+        
+        Bob \\|- Alice: Hello Alice, how are you?
+        Bob /|- Alice: Hello Alice, how are you?
+        Bob //- Alice: Hello Alice, how are you?
+        Bob \\\\- Alice: Hello Alice, how are you?        
+    `);
+
+    const messages = diagram.db.getMessages();
+  });
+
+  it('2 should parse ', async () => {
+    const diagram = await Diagram.fromText(`
+    sequenceDiagram
+    actor Bob
+    actor Alice
+      Alice ()<<->>() Bob: hey?
+    `);
+
+    const messages = diagram.db.getMessages();
+  });
   describe('when parsing extended participant syntax', () => {
     it('should parse participants with different quote styles and whitespace', async () => {
       const diagram = await Diagram.fromText(`
@@ -2325,5 +2609,17 @@ Bob->>Alice:Got it!
       expect(actors.get('E').type).toBe('entity');
       expect(actors.get('E').description).toBe('E');
     });
+    it('should handle fail parsing when alias token causes conflicts in participant definition', async () => {
+      let error = false;
+      try {
+        await Diagram.fromText(`
+        sequenceDiagram
+        participant SAS MyServiceWithMoreThan20Chars <br> service decription
+       `);
+      } catch (e) {
+        error = true;
+      }
+      expect(error).toBe(true);
+    });
   });
 });

packages/mermaid/src/diagrams/sequence/sequenceRenderer.ts

@@ -282,6 +282,49 @@ const drawNote = async function (elem: any, noteModel: NoteModel) {
   bounds.models.addNote(noteModel);
 };
 
+const drawCentralConnection = function (
+  elem: any,
+  msg: any,
+  msgModel: any,
+  diagObj: Diagram,
+  startx: number,
+  stopx: number,
+  lineStartY: number
+) {
+  const actors = diagObj.db.getActors();
+  const fromActor = actors.get(msg.from);
+  const toActor = actors.get(msg.to);
+  const fromCenter = fromActor.x + fromActor.width / 2;
+  const toCenter = toActor.x + toActor.width / 2;
+
+  const g = elem.append('g');
+
+  const drawCircle = (cx: number) => {
+    g.append('circle')
+      .attr('cx', cx)
+      .attr('cy', lineStartY)
+      .attr('r', 5)
+      .attr('width', 10)
+      .attr('height', 10);
+  };
+
+  const { CENTRAL_CONNECTION, CENTRAL_CONNECTION_REVERSE, CENTRAL_CONNECTION_DUAL } =
+    diagObj.db.LINETYPE;
+
+  switch (msg.centralConnection) {
+    case CENTRAL_CONNECTION:
+      drawCircle(toCenter);
+      break;
+    case CENTRAL_CONNECTION_REVERSE:
+      drawCircle(fromCenter);
+      break;
+    case CENTRAL_CONNECTION_DUAL:
+      drawCircle(fromCenter);
+      drawCircle(toCenter);
+      break;
+  }
+};
+
 const messageFont = (cnf) => {
   return {
     fontFamily: cnf.messageFontFamily,
@@ -367,7 +410,7 @@ async function boundMessage(_diagram, msgModel): Promise<number> {
  * @param lineStartY - The Y coordinate at which the message line starts
  * @param diagObj - The diagram object.
  */
-const drawMessage = async function (diagram, msgModel, lineStartY: number, diagObj: Diagram) {
+const drawMessage = async function (diagram, msgModel, lineStartY: number, diagObj: Diagram, msg) {
   const { startx, stopx, starty, message, type, sequenceIndex, sequenceVisible } = msgModel;
   const textDims = utils.calculateTextDimensions(message, messageFont(conf));
   const textObj = svgDrawCommon.getTextObj();
@@ -433,6 +476,9 @@ const drawMessage = async function (diagram, msgModel, lineStartY: number, diagO
     line.attr('y1', lineStartY);
     line.attr('x2', stopx);
     line.attr('y2', lineStartY);
+    if (hasCentralConnection(msg, diagObj)) {
+      drawCentralConnection(diagram, msg, msgModel, diagObj, startx, stopx, lineStartY);
+    }
   }
   // Make an SVG Container
   // Draw the line
@@ -441,7 +487,15 @@ const drawMessage = async function (diagram, msgModel, lineStartY: number, diagO
     type === diagObj.db.LINETYPE.DOTTED_CROSS ||
     type === diagObj.db.LINETYPE.DOTTED_POINT ||
     type === diagObj.db.LINETYPE.DOTTED_OPEN ||
-    type === diagObj.db.LINETYPE.BIDIRECTIONAL_DOTTED
+    type === diagObj.db.LINETYPE.BIDIRECTIONAL_DOTTED ||
+    type === diagObj.db.LINETYPE.SOLID_TOP_DOTTED ||
+    type === diagObj.db.LINETYPE.SOLID_BOTTOM_DOTTED ||
+    type === diagObj.db.LINETYPE.STICK_TOP_DOTTED ||
+    type === diagObj.db.LINETYPE.STICK_BOTTOM_DOTTED ||
+    type === diagObj.db.LINETYPE.SOLID_ARROW_TOP_REVERSE_DOTTED ||
+    type === diagObj.db.LINETYPE.SOLID_ARROW_BOTTOM_REVERSE_DOTTED ||
+    type === diagObj.db.LINETYPE.STICK_ARROW_TOP_REVERSE_DOTTED ||
+    type === diagObj.db.LINETYPE.STICK_ARROW_BOTTOM_REVERSE_DOTTED
   ) {
     line.style('stroke-dasharray', '3, 3');
     line.attr('class', 'messageLine1');
@@ -457,6 +511,51 @@ const drawMessage = async function (diagram, msgModel, lineStartY: number, diagO
   line.attr('stroke-width', 2);
   line.attr('stroke', 'none'); // handled by theme/css anyway
   line.style('fill', 'none'); // remove any fill colour
+
+  if (type === diagObj.db.LINETYPE.SOLID_TOP || type === diagObj.db.LINETYPE.SOLID_TOP_DOTTED) {
+    line.attr('marker-end', 'url(' + url + '#solidTopArrowHead)');
+  }
+  if (
+    type === diagObj.db.LINETYPE.SOLID_BOTTOM ||
+    type === diagObj.db.LINETYPE.SOLID_BOTTOM_DOTTED
+  ) {
+    line.attr('marker-end', 'url(' + url + '#solidBottomArrowHead)');
+  }
+  if (type === diagObj.db.LINETYPE.STICK_TOP || type === diagObj.db.LINETYPE.STICK_TOP_DOTTED) {
+    line.attr('marker-end', 'url(' + url + '#stickTopArrowHead)');
+  }
+  if (
+    type === diagObj.db.LINETYPE.STICK_BOTTOM ||
+    type === diagObj.db.LINETYPE.STICK_BOTTOM_DOTTED
+  ) {
+    line.attr('marker-end', 'url(' + url + '#stickBottomArrowHead)');
+  }
+
+  if (
+    type === diagObj.db.LINETYPE.SOLID_ARROW_TOP_REVERSE ||
+    type === diagObj.db.LINETYPE.SOLID_ARROW_TOP_REVERSE_DOTTED
+  ) {
+    line.attr('marker-start', 'url(' + url + '#solidBottomArrowHead)');
+  }
+  if (
+    type === diagObj.db.LINETYPE.SOLID_ARROW_BOTTOM_REVERSE ||
+    type === diagObj.db.LINETYPE.SOLID_ARROW_BOTTOM_REVERSE_DOTTED
+  ) {
+    line.attr('marker-start', 'url(' + url + '#solidTopArrowHead)');
+  }
+  if (
+    type === diagObj.db.LINETYPE.STICK_ARROW_TOP_REVERSE ||
+    type === diagObj.db.LINETYPE.STICK_ARROW_TOP_REVERSE_DOTTED
+  ) {
+    line.attr('marker-start', 'url(' + url + '#stickBottomArrowHead)');
+  }
+  if (
+    type === diagObj.db.LINETYPE.STICK_ARROW_BOTTOM_REVERSE ||
+    type === diagObj.db.LINETYPE.STICK_ARROW_BOTTOM_REVERSE_DOTTED
+  ) {
+    line.attr('marker-start', 'url(' + url + '#stickTopArrowHead)');
+  }
+
   if (type === diagObj.db.LINETYPE.SOLID || type === diagObj.db.LINETYPE.DOTTED) {
     line.attr('marker-end', 'url(' + url + '#arrowhead)');
   }
@@ -481,7 +580,18 @@ const drawMessage = async function (diagram, msgModel, lineStartY: number, diagO
       type === diagObj.db.LINETYPE.BIDIRECTIONAL_SOLID ||
       type === diagObj.db.LINETYPE.BIDIRECTIONAL_DOTTED;
 
-    if (isBidirectional) {
+    const isReverseArrowType =
+      type === diagObj.db.LINETYPE.SOLID_ARROW_TOP_REVERSE ||
+      type === diagObj.db.LINETYPE.SOLID_ARROW_TOP_REVERSE_DOTTED ||
+      type === diagObj.db.LINETYPE.SOLID_ARROW_BOTTOM_REVERSE ||
+      type === diagObj.db.LINETYPE.SOLID_ARROW_BOTTOM_REVERSE_DOTTED ||
+      type === diagObj.db.LINETYPE.STICK_ARROW_TOP_REVERSE ||
+      type === diagObj.db.LINETYPE.STICK_ARROW_TOP_REVERSE_DOTTED ||
+      type === diagObj.db.LINETYPE.STICK_ARROW_BOTTOM_REVERSE ||
+      type === diagObj.db.LINETYPE.STICK_ARROW_BOTTOM_REVERSE_DOTTED;
+
+    let x = 0;
+    if (isBidirectional || isReverseArrowType) {
       const SEQUENCE_NUMBER_RADIUS = 6;
 
       if (startx < stopx) {
@@ -489,6 +599,7 @@ const drawMessage = async function (diagram, msgModel, lineStartY: number, diagO
       } else {
         line.attr('x1', startx + SEQUENCE_NUMBER_RADIUS);
       }
+      x = 3.5;
     }
 
     diagram
@@ -498,7 +609,8 @@ const drawMessage = async function (diagram, msgModel, lineStartY: number, diagO
       .attr('x2', startx)
       .attr('y2', lineStartY)
       .attr('stroke-width', 0)
-      .attr('marker-start', 'url(' + url + '#sequencenumber)');
+      .attr('marker-start', 'url(' + url + '#sequencenumber)')
+      .attr('transform', `translate(-${x}, 0)`);
 
     diagram
       .append('text')
@@ -508,7 +620,8 @@ const drawMessage = async function (diagram, msgModel, lineStartY: number, diagO
       .attr('font-size', '12px')
       .attr('text-anchor', 'middle')
       .attr('class', 'sequenceNumber')
-      .text(sequenceIndex);
+      .text(sequenceIndex)
+      .attr('transform', `translate(-${x}, 0)`);
   }
 };
 
@@ -857,6 +970,10 @@ export const draw = async function (_text: string, id: string, _version: string,
   svgDraw.insertArrowCrossHead(diagram);
   svgDraw.insertArrowFilledHead(diagram);
   svgDraw.insertSequenceNumber(diagram);
+  svgDraw.insertSolidTopArrowHead(diagram);
+  svgDraw.insertSolidBottomArrowHead(diagram);
+  svgDraw.insertStickTopArrowHead(diagram);
+  svgDraw.insertStickBottomArrowHead(diagram);
 
   /**
    * @param msg - The message to draw.
@@ -897,6 +1014,12 @@ export const draw = async function (_text: string, id: string, _version: string,
       case diagObj.db.LINETYPE.ACTIVE_START:
         bounds.newActivation(msg, diagram, actors);
         break;
+      case diagObj.db.LINETYPE.CENTRAL_CONNECTION:
+        bounds.newActivation(msg, diagram, actors);
+        break;
+      case diagObj.db.LINETYPE.CENTRAL_CONNECTION_REVERSE:
+        bounds.newActivation(msg, diagram, actors);
+        break;
       case diagObj.db.LINETYPE.ACTIVE_END:
         activeEnd(msg, bounds.getVerticalPos());
         break;
@@ -1055,7 +1178,7 @@ export const draw = async function (_text: string, id: string, _version: string,
             createdActors,
             destroyedActors
           );
-          messagesToDraw.push({ messageModel: msgModel, lineStartY: lineStartY });
+          messagesToDraw.push({ messageModel: msgModel, lineStartY: lineStartY, msg });
           bounds.models.addMessage(msgModel);
         } catch (e) {
           log.error('error while drawing message', e);
@@ -1068,6 +1191,27 @@ export const draw = async function (_text: string, id: string, _version: string,
         diagObj.db.LINETYPE.SOLID_OPEN,
         diagObj.db.LINETYPE.DOTTED_OPEN,
         diagObj.db.LINETYPE.SOLID,
+
+        diagObj.db.LINETYPE.SOLID_TOP,
+        diagObj.db.LINETYPE.SOLID_BOTTOM,
+        diagObj.db.LINETYPE.STICK_TOP,
+        diagObj.db.LINETYPE.STICK_BOTTOM,
+
+        diagObj.db.LINETYPE.SOLID_TOP_DOTTED,
+        diagObj.db.LINETYPE.SOLID_BOTTOM_DOTTED,
+        diagObj.db.LINETYPE.STICK_TOP_DOTTED,
+        diagObj.db.LINETYPE.STICK_BOTTOM_DOTTED,
+
+        diagObj.db.LINETYPE.SOLID_ARROW_TOP_REVERSE,
+        diagObj.db.LINETYPE.SOLID_ARROW_BOTTOM_REVERSE,
+        diagObj.db.LINETYPE.STICK_ARROW_TOP_REVERSE,
+        diagObj.db.LINETYPE.STICK_ARROW_BOTTOM_REVERSE,
+
+        diagObj.db.LINETYPE.SOLID_ARROW_TOP_REVERSE_DOTTED,
+        diagObj.db.LINETYPE.SOLID_ARROW_BOTTOM_REVERSE_DOTTED,
+        diagObj.db.LINETYPE.STICK_ARROW_TOP_REVERSE_DOTTED,
+        diagObj.db.LINETYPE.STICK_ARROW_BOTTOM_REVERSE_DOTTED,
+
         diagObj.db.LINETYPE.DOTTED,
         diagObj.db.LINETYPE.SOLID_CROSS,
         diagObj.db.LINETYPE.DOTTED_CROSS,
@@ -1087,7 +1231,7 @@ export const draw = async function (_text: string, id: string, _version: string,
   await drawActors(diagram, actors, actorKeys, false);
 
   for (const e of messagesToDraw) {
-    await drawMessage(diagram, e.messageModel, e.lineStartY, diagObj);
+    await drawMessage(diagram, e.messageModel, e.lineStartY, diagObj, e.msg);
   }
   if (conf.mirrorActors) {
     await drawActors(diagram, actors, actorKeys, true);
@@ -1461,12 +1605,85 @@ const buildNoteModel = async function (msg, actors, diagObj) {
   return noteModel;
 };
 
+// Central connection positioning constants
+const CENTRAL_CONNECTION_BASE_OFFSET = 4;
+const CENTRAL_CONNECTION_BIDIRECTIONAL_OFFSET = 6;
+
+/**
+ * Check if a message has central connection
+ * @param msg - The message object
+ * @param diagObj - The diagram object containing LINETYPE constants
+ * @returns True if the message has any type of central connection
+ */
+const hasCentralConnection = function (msg, diagObj) {
+  const { CENTRAL_CONNECTION, CENTRAL_CONNECTION_REVERSE, CENTRAL_CONNECTION_DUAL } =
+    diagObj.db.LINETYPE;
+  return [CENTRAL_CONNECTION, CENTRAL_CONNECTION_REVERSE, CENTRAL_CONNECTION_DUAL].includes(
+    msg.centralConnection
+  );
+};
+
+/**
+ * Calculate the positioning offset for central connection arrows
+ * @param msg - The message object
+ * @param diagObj - The diagram object containing LINETYPE constants
+ * @param isArrowToRight - Whether the arrow is pointing to the right
+ * @returns The offset to apply to startx position
+ */
+const calculateCentralConnectionOffset = function (msg, diagObj, isArrowToRight) {
+  const {
+    CENTRAL_CONNECTION_REVERSE,
+    CENTRAL_CONNECTION_DUAL,
+    BIDIRECTIONAL_SOLID,
+    BIDIRECTIONAL_DOTTED,
+  } = diagObj.db.LINETYPE;
+
+  let offset = 0;
+
+  if (
+    msg.centralConnection === CENTRAL_CONNECTION_REVERSE ||
+    msg.centralConnection === CENTRAL_CONNECTION_DUAL
+  ) {
+    offset += CENTRAL_CONNECTION_BASE_OFFSET;
+  }
+
+  if (
+    msg.centralConnection === CENTRAL_CONNECTION_DUAL &&
+    (msg.type === BIDIRECTIONAL_SOLID || msg.type === BIDIRECTIONAL_DOTTED)
+  ) {
+    offset += isArrowToRight ? 0 : -CENTRAL_CONNECTION_BIDIRECTIONAL_OFFSET;
+  }
+
+  return offset;
+};
+
 const buildMessageModel = function (msg, actors, diagObj) {
   if (
     ![
       diagObj.db.LINETYPE.SOLID_OPEN,
       diagObj.db.LINETYPE.DOTTED_OPEN,
       diagObj.db.LINETYPE.SOLID,
+
+      diagObj.db.LINETYPE.SOLID_TOP,
+      diagObj.db.LINETYPE.SOLID_BOTTOM,
+      diagObj.db.LINETYPE.STICK_TOP,
+      diagObj.db.LINETYPE.STICK_BOTTOM,
+
+      diagObj.db.LINETYPE.SOLID_TOP_DOTTED,
+      diagObj.db.LINETYPE.SOLID_BOTTOM_DOTTED,
+      diagObj.db.LINETYPE.STICK_TOP_DOTTED,
+      diagObj.db.LINETYPE.STICK_BOTTOM_DOTTED,
+
+      diagObj.db.LINETYPE.SOLID_ARROW_TOP_REVERSE,
+      diagObj.db.LINETYPE.SOLID_ARROW_BOTTOM_REVERSE,
+      diagObj.db.LINETYPE.STICK_ARROW_TOP_REVERSE,
+      diagObj.db.LINETYPE.STICK_ARROW_BOTTOM_REVERSE,
+
+      diagObj.db.LINETYPE.SOLID_ARROW_TOP_REVERSE_DOTTED,
+      diagObj.db.LINETYPE.SOLID_ARROW_BOTTOM_REVERSE_DOTTED,
+      diagObj.db.LINETYPE.STICK_ARROW_TOP_REVERSE_DOTTED,
+      diagObj.db.LINETYPE.STICK_ARROW_BOTTOM_REVERSE_DOTTED,
+
       diagObj.db.LINETYPE.DOTTED,
       diagObj.db.LINETYPE.SOLID_CROSS,
       diagObj.db.LINETYPE.DOTTED_CROSS,
@@ -1484,6 +1701,8 @@ const buildMessageModel = function (msg, actors, diagObj) {
   let startx = isArrowToRight ? fromRight : fromLeft;
   let stopx = isArrowToRight ? toLeft : toRight;
 
+  // Apply central connection positioning adjustments
+  startx += calculateCentralConnectionOffset(msg, diagObj, isArrowToRight);
   // As the line width is considered, the left and right values will be off by 2.
   const isArrowToActivation = Math.abs(toLeft - toRight) > 2;
 
@@ -1517,7 +1736,30 @@ const buildMessageModel = function (msg, actors, diagObj) {
      * Shorten the length of arrow at the end and move the marker forward (using refX) to have a clean arrowhead
      * This is not required for open arrows that don't have arrowheads
      */
-    if (![diagObj.db.LINETYPE.SOLID_OPEN, diagObj.db.LINETYPE.DOTTED_OPEN].includes(msg.type)) {
+    if (
+      ![
+        diagObj.db.LINETYPE.SOLID_OPEN,
+        diagObj.db.LINETYPE.DOTTED_OPEN,
+
+        diagObj.db.LINETYPE.STICK_TOP,
+        diagObj.db.LINETYPE.STICK_BOTTOM,
+
+        diagObj.db.LINETYPE.STICK_TOP_DOTTED,
+        diagObj.db.LINETYPE.STICK_BOTTOM_DOTTED,
+
+        diagObj.db.LINETYPE.SOLID_ARROW_TOP_REVERSE_DOTTED,
+        diagObj.db.LINETYPE.SOLID_ARROW_BOTTOM_REVERSE_DOTTED,
+
+        diagObj.db.LINETYPE.STICK_ARROW_TOP_REVERSE,
+        diagObj.db.LINETYPE.STICK_ARROW_BOTTOM_REVERSE,
+
+        diagObj.db.LINETYPE.STICK_ARROW_TOP_REVERSE_DOTTED,
+        diagObj.db.LINETYPE.STICK_ARROW_BOTTOM_REVERSE_DOTTED,
+
+        diagObj.db.LINETYPE.SOLID_ARROW_TOP_REVERSE,
+        diagObj.db.LINETYPE.SOLID_ARROW_BOTTOM_REVERSE,
+      ].includes(msg.type)
+    ) {
       stopx += adjustValue(3);
     }
 
@@ -1525,9 +1767,14 @@ const buildMessageModel = function (msg, actors, diagObj) {
      * Shorten start position of bidirectional arrow to accommodate for second arrowhead
      */
     if (
-      [diagObj.db.LINETYPE.BIDIRECTIONAL_SOLID, diagObj.db.LINETYPE.BIDIRECTIONAL_DOTTED].includes(
-        msg.type
-      )
+      [
+        diagObj.db.LINETYPE.BIDIRECTIONAL_SOLID,
+        diagObj.db.LINETYPE.BIDIRECTIONAL_DOTTED,
+        diagObj.db.LINETYPE.SOLID_ARROW_TOP_REVERSE_DOTTED,
+        diagObj.db.LINETYPE.SOLID_ARROW_BOTTOM_REVERSE_DOTTED,
+        diagObj.db.LINETYPE.SOLID_ARROW_TOP_REVERSE,
+        diagObj.db.LINETYPE.SOLID_ARROW_BOTTOM_REVERSE,
+      ].includes(msg.type)
     ) {
       startx -= adjustValue(3);
     }

packages/mermaid/src/diagrams/sequence/svgDraw.js

@@ -1709,6 +1709,77 @@ const _drawMenuItemTextCandidateFunc = (function () {
   };
 })();
 
+/**
+ * Setup arrow head and define the marker. The result is appended to the svg.
+ *
+ * @param elem
+ */
+export const insertSolidTopArrowHead = function (elem) {
+  elem
+    .append('defs')
+    .append('marker')
+    .attr('id', 'solidTopArrowHead')
+    .attr('refX', 7.9)
+    .attr('refY', 7.25)
+    .attr('markerUnits', 'userSpaceOnUse')
+    .attr('markerWidth', 12)
+    .attr('markerHeight', 12)
+    .attr('orient', 'auto-start-reverse')
+    .append('path')
+    .attr('d', 'M 0 0 L 10 8 L 0 8 z'); // this is actual shape for arrowhead
+};
+
+export const insertSolidBottomArrowHead = function (elem) {
+  elem
+    .append('defs')
+    .append('marker')
+    .attr('id', 'solidBottomArrowHead')
+    .attr('refX', 7.9)
+    .attr('refY', 0.75)
+    .attr('markerUnits', 'userSpaceOnUse')
+    .attr('markerWidth', 12)
+    .attr('markerHeight', 12)
+    .attr('orient', 'auto-start-reverse')
+    .append('path')
+    .attr('d', 'M 0 0 L 10 0 L 0 8 z');
+};
+
+export const insertStickTopArrowHead = function (elem) {
+  elem
+    .append('defs')
+    .append('marker')
+    .attr('id', 'stickTopArrowHead')
+    .attr('refX', 7.5)
+    .attr('refY', 7)
+    .attr('markerUnits', 'userSpaceOnUse')
+    .attr('markerWidth', 12)
+    .attr('markerHeight', 12)
+    .attr('orient', 'auto-start-reverse')
+    .append('path')
+    .attr('d', 'M 0 0 L 7 7')
+    .attr('stroke', 'black')
+    .attr('stroke-width', 1.5)
+    .attr('fill', 'none');
+};
+
+export const insertStickBottomArrowHead = function (elem) {
+  elem
+    .append('defs')
+    .append('marker')
+    .attr('id', 'stickBottomArrowHead')
+    .attr('refX', 7.5)
+    .attr('refY', 0)
+    .attr('markerUnits', 'userSpaceOnUse')
+    .attr('markerWidth', 12)
+    .attr('markerHeight', 12)
+    .attr('orient', 'auto-start-reverse')
+    .append('path')
+    .attr('d', 'M 0 7 L 7 0')
+    .attr('stroke', 'black')
+    .attr('stroke-width', 1.5)
+    .attr('fill', 'none');
+};
+
 export default {
   drawRect,
   drawText,
@@ -1731,4 +1802,8 @@ export default {
   getNoteRect,
   fixLifeLineHeights,
   sanitizeUrl,
+  insertSolidTopArrowHead,
+  insertSolidBottomArrowHead,
+  insertStickTopArrowHead,
+  insertStickBottomArrowHead,
 };

packages/mermaid/src/diagrams/sequence/types.ts

@@ -35,6 +35,7 @@ export interface Message {
   type?: number;
   activate?: boolean;
   placement?: string;
+  centralConnection?: number;
 }
 
 export interface AddMessageParams {
@@ -50,6 +51,8 @@ export interface AddMessageParams {
     | 'destroyParticipant'
     | 'activeStart'
     | 'activeEnd'
+    | 'centralConnection'
+    | 'centralConnectionReverse'
     | 'addNote'
     | 'addLinks'
     | 'addALink'

packages/mermaid/src/docs/package.json

@@ -17,7 +17,7 @@
   },
   "dependencies": {
     "@mdi/font": "^7.4.47",
-    "@vueuse/core": "^13.1.0",
+    "@vueuse/core": "^13.9.0",
     "font-awesome": "^4.7.0",
     "jiti": "^2.4.2",
     "mermaid": "workspace:^",
@@ -25,17 +25,17 @@
   },
   "devDependencies": {
     "@iconify-json/carbon": "^1.2.13",
-    "@unocss/reset": "^66.0.0",
+    "@unocss/reset": "^66.5.1",
     "@vite-pwa/vitepress": "^1.0.0",
     "@vitejs/plugin-vue": "^6.0.1",
     "fast-glob": "^3.3.3",
     "https-localhost": "^4.7.1",
     "pathe": "^2.0.3",
-    "unocss": "^66.4.2",
-    "unplugin-vue-components": "^28.4.0",
-    "vite": "^7.0.0",
-    "vite-plugin-pwa": "^1.0.0",
-    "vitepress": "1.6.3",
+    "unocss": "^66.5.1",
+    "unplugin-vue-components": "^28.4.1",
+    "vite": "^7.0.7",
+    "vite-plugin-pwa": "^1.0.3",
+    "vitepress": "1.6.4",
     "workbox-window": "^7.3.0"
   }
 }

packages/mermaid/src/docs/syntax/classDiagram.md

@@ -15,7 +15,7 @@ title: Animal example
 classDiagram
     note "From Duck till Zebra"
     Animal <|-- Duck
-    note for Duck "can fly\ncan swim\ncan dive\ncan help in debugging"
+    note for Duck "can fly<br>can swim<br>can dive<br>can help in debugging"
     Animal <|-- Fish
     Animal <|-- Zebra
     Animal : +int age
@@ -44,7 +44,7 @@ classDiagram
 UML provides mechanisms to represent class members, such as attributes and methods, and additional information about them.
 A single instance of a class in the diagram contains three compartments:
 
-- The top compartment contains the name of the class. It is printed in bold and centered, and the first letter is capitalized. It may also contain optional annotation text describing the nature of the class.
+- The top compartment contains the name of the class. It is printed in bold and centered, and the first letter is capitalized. It may also contain optional annotation/stereotype text describing the nature of the class.
 - The middle compartment contains the attributes of the class. They are left-aligned and the first letter is lowercase.
 - The bottom compartment contains the operations the class can execute. They are also left-aligned and the first letter is lowercase.
 
@@ -349,7 +349,7 @@ classDiagram
     Galaxy --> "many" Star : Contains
 ```
 
-## Annotations on classes
+## Annotations on classes (stereotypes)
 
 It is possible to annotate classes with markers to provide additional metadata about the class. This can give a clearer indication about its nature. Some common annotations include:
 
@@ -358,38 +358,22 @@ It is possible to annotate classes with markers to provide additional metadata a
 - `<<Service>>` To represent a service class
 - `<<Enumeration>>` To represent an enum
 
-Annotations are defined within the opening `<<` and closing `>>`. There are two ways to add an annotation to a class, and either way the output will be same:
+Annotations are defined within the opening `<<` and closing `>>`. There are multiple ways to add an annotation to a class, and any of them will output the same result:
 
-> **Tip:**  
-> In Mermaid class diagrams, annotations like `<<interface>>` can be attached in two ways:
->
-> - **Inline with the class definition** (Recommended for consistency):
->
->   ```mermaid-example
->   classDiagram
->     class Shape <<interface>>
->   ```
->
-> - **Separate line after the class definition**:
->
->   ```mermaid-example
->   classDiagram
->     class Shape
->     <<interface>> Shape
->   ```
->
-> Both methods are fully supported and produce identical diagrams.  
-> However, it is recommended to use the **inline style** for better readability and consistent formatting across diagrams.
+- **Inline with the class definition** (Recommended for consistency):
 
-- In a **_separate line_** after a class is defined:
+  ```mermaid-example
+  classDiagram
+    class Shape <<interface>>
+  ```
 
-```mermaid-example
-classDiagram
-class Shape
-<<interface>> Shape
-Shape : noOfVertices
-Shape : draw()
-```
+- **Separate line after the class definition**:
+
+  ```mermaid-example
+  classDiagram
+    class Shape
+    <<interface>> Shape
+  ```
 
 - In a **_nested structure_** along with the class definition:
 
@@ -411,6 +395,19 @@ class Color{
 
 ```
 
+For the case of multiple annotations the syntax is similar, you can add other annotations on the same line, or in a nested class definition add an annotation on a new line, as follows:
+
+```mermaid-example
+classDiagram
+class Shape{
+    <<interface>>
+    <<injected>>
+    noOfVertices
+    draw()
+}
+
+```
+
 ## Comments
 
 Comments can be entered within a class diagram, which will be ignored by the parser. Comments need to be on their own line, and must be prefaced with `%%` (double percent signs). Any text until the next newline will be treated as a comment, including any class diagram syntax.

packages/mermaid/src/docs/syntax/sequenceDiagram.md

@@ -216,7 +216,11 @@ Messages can be of two displayed either solid or with a dotted line.
 [Actor][Arrow][Actor]:Message text
 ```
 
-There are ten types of arrows currently supported:
+Lines can be solid or dotted, and can end with various types of arrowheads, crosses, or open arrows.
+
+#### Supported Arrow Types
+
+**Standard Arrow Types**
 
 | Type     | Description                                          |
 | -------- | ---------------------------------------------------- |
@@ -231,6 +235,49 @@ There are ten types of arrows currently supported:
 | `-)`     | Solid line with an open arrow at the end (async)     |
 | `--)`    | Dotted line with a open arrow at the end (async)     |
 
+**Half-Arrows (v<MERMAID_RELEASE_VERSION>+)**
+
+The following half-arrow types are supported for more expressive sequence diagrams. Both solid and dotted variants are available by increasing the number of dashes (`-` → `--`).
+
+---
+
+| Type    | Description                                          |
+| ------- | ---------------------------------------------------- |
+| `-\|\`  | Solid line with top half arrowhead                   |
+| `--\|\` | Dotted line with top half arrowhead                  |
+| `-\|/`  | Solid line with bottom half arrowhead                |
+| `--\|/` | Dotted line with bottom half arrowhead               |
+| `/\|-`  | Solid line with reverse top half arrowhead           |
+| `/\|--` | Dotted line with reverse top half arrowhead          |
+| `\\-`   | Solid line with reverse bottom half arrowhead        |
+| `\\--`  | Dotted line with reverse bottom half arrowhead       |
+| `-\\`   | Solid line with top stick half arrowhead             |
+| `--\\`  | Dotted line with top stick half arrowhead            |
+| `-//`   | Solid line with bottom stick half arrowhead          |
+| `--//`  | Dotted line with bottom stick half arrowhead         |
+| `//-`   | Solid line with reverse top stick half arrowhead     |
+| `//--`  | Dotted line with reverse top stick half arrowhead    |
+| `\\-`   | Solid line with reverse bottom stick half arrowhead  |
+| `\\--`  | Dotted line with reverse bottom stick half arrowhead |
+
+## Central Connections (v<MERMAID_RELEASE_VERSION>+)
+
+Mermaid sequence diagrams support **central lifeline connections** using a `()`.
+This is useful to represent messages or signals that connect to a central point, rather than from one actor directly to another.
+
+To indicate a central connection, append `()` to the arrow syntax.
+
+#### Basic Syntax
+
+```mermaid-example
+sequenceDiagram
+    participant Alice
+    participant John
+    Alice->>()John: Hello John
+    Alice()->>John: How are you?
+    John()->>()Alice: Great!
+```
+
 ## Activations
 
 It is possible to activate and deactivate an actor. (de)activation can be dedicated declarations:

packages/mermaid/src/mermaid.spec.ts

@@ -207,7 +207,7 @@ describe('when using mermaid and ', () => {
         [Error: Parse error on line 2:
         ...equenceDiagramAlice:->Bob: Hello Bob, h...
         ----------------------^
-        Expecting 'SOLID_OPEN_ARROW', 'DOTTED_OPEN_ARROW', 'SOLID_ARROW', 'BIDIRECTIONAL_SOLID_ARROW', 'DOTTED_ARROW', 'BIDIRECTIONAL_DOTTED_ARROW', 'SOLID_CROSS', 'DOTTED_CROSS', 'SOLID_POINT', 'DOTTED_POINT', got 'TXT']
+        Expecting '()', 'SOLID_OPEN_ARROW', 'DOTTED_OPEN_ARROW', 'SOLID_ARROW', 'SOLID_ARROW_TOP', 'SOLID_ARROW_BOTTOM', 'STICK_ARROW_TOP', 'STICK_ARROW_BOTTOM', 'SOLID_ARROW_TOP_DOTTED', 'SOLID_ARROW_BOTTOM_DOTTED', 'STICK_ARROW_TOP_DOTTED', 'STICK_ARROW_BOTTOM_DOTTED', 'SOLID_ARROW_TOP_REVERSE', 'SOLID_ARROW_BOTTOM_REVERSE', 'STICK_ARROW_TOP_REVERSE', 'STICK_ARROW_BOTTOM_REVERSE', 'SOLID_ARROW_TOP_REVERSE_DOTTED', 'SOLID_ARROW_BOTTOM_REVERSE_DOTTED', 'STICK_ARROW_TOP_REVERSE_DOTTED', 'STICK_ARROW_BOTTOM_REVERSE_DOTTED', 'BIDIRECTIONAL_SOLID_ARROW', 'DOTTED_ARROW', 'BIDIRECTIONAL_DOTTED_ARROW', 'SOLID_CROSS', 'DOTTED_CROSS', 'SOLID_POINT', 'DOTTED_POINT', got 'TXT']
       `);
     });
 

packages/mermaid/src/rendering-util/rendering-elements/edges.js

@@ -605,6 +605,14 @@ export const insertEdge = function (
   const edgeStyles = Array.isArray(edge.style) ? edge.style : [edge.style];
   let strokeColor = edgeStyles.find((style) => style?.startsWith('stroke:'));
 
+  let animationClass = '';
+  if (edge.animate) {
+    animationClass = 'edge-animation-fast';
+  }
+  if (edge.animation) {
+    animationClass = 'edge-animation-' + edge.animation;
+  }
+
   let animatedEdge = false;
   if (edge.look === 'handDrawn') {
     const rc = rough.svg(elem);
@@ -620,7 +628,13 @@ export const insertEdge = function (
     svgPath = select(svgPathNode)
       .select('path')
       .attr('id', edge.id)
-      .attr('class', ' ' + strokeClasses + (edge.classes ? ' ' + edge.classes : ''))
+      .attr(
+        'class',
+        ' ' +
+          strokeClasses +
+          (edge.classes ? ' ' + edge.classes : '') +
+          (animationClass ? ' ' + animationClass : '')
+      )
       .attr('style', edgeStyles ? edgeStyles.reduce((acc, style) => acc + ';' + style, '') : '');
     let d = svgPath.attr('d');
     svgPath.attr('d', d);
@@ -628,13 +642,6 @@ export const insertEdge = function (
   } else {
     const stylesFromClasses = edgeClassStyles.join(';');
     const styles = edgeStyles ? edgeStyles.reduce((acc, style) => acc + style + ';', '') : '';
-    let animationClass = '';
-    if (edge.animate) {
-      animationClass = ' edge-animation-fast';
-    }
-    if (edge.animation) {
-      animationClass = ' edge-animation-' + edge.animation;
-    }
 
     const pathStyle =
       (stylesFromClasses ? stylesFromClasses + ';' + styles + ';' : styles) +
@@ -646,7 +653,10 @@ export const insertEdge = function (
       .attr('id', edge.id)
       .attr(
         'class',
-        ' ' + strokeClasses + (edge.classes ? ' ' + edge.classes : '') + (animationClass ?? '')
+        ' ' +
+          strokeClasses +
+          (edge.classes ? ' ' + edge.classes : '') +
+          (animationClass ? ' ' + animationClass : '')
       )
       .attr('style', pathStyle);
 

packages/mermaid/src/rendering-util/rendering-elements/markers.js

@@ -130,7 +130,6 @@ const lollipop = (elem, type, id) => {
     .attr('markerHeight', 240)
     .attr('orient', 'auto')
     .append('circle')
-    .attr('stroke', 'black')
     .attr('fill', 'transparent')
     .attr('cx', 7)
     .attr('cy', 7)
@@ -147,7 +146,6 @@ const lollipop = (elem, type, id) => {
     .attr('markerHeight', 240)
     .attr('orient', 'auto')
     .append('circle')
-    .attr('stroke', 'black')
     .attr('fill', 'transparent')
     .attr('cx', 7)
     .attr('cy', 7)

packages/tiny/CHANGELOG.md

@@ -1,24 +1,5 @@
 # mermaid
 
-## 11.12.0
-
-### Minor Changes
-
-- [#6921](https://github.com/mermaid-js/mermaid/pull/6921) [`764b315`](https://github.com/mermaid-js/mermaid/commit/764b315dc16d0359add7c6b8e3ef7592e9bdc09c) Thanks [@quilicicf](https://github.com/quilicicf)! - feat: Add IDs in architecture diagrams
-
-### Patch Changes
-
-- [#6950](https://github.com/mermaid-js/mermaid/pull/6950) [`a957908`](https://github.com/mermaid-js/mermaid/commit/a9579083bfba367a4f4678547ec37ed7b61b9f5b) Thanks [@shubhamparikh2704](https://github.com/shubhamparikh2704)! - chore: Fix mindmap rendering in docs and apply tidytree layout
-
-- [#6826](https://github.com/mermaid-js/mermaid/pull/6826) [`1d36810`](https://github.com/mermaid-js/mermaid/commit/1d3681053b9168354e48e5763023b6305cd1ca72) Thanks [@darshanr0107](https://github.com/darshanr0107)! - fix: Ensure edge label color is applied when using classDef with edge IDs
-
-- [#6945](https://github.com/mermaid-js/mermaid/pull/6945) [`d318f1a`](https://github.com/mermaid-js/mermaid/commit/d318f1a13cd7429334a29c70e449074ec1cb9f68) Thanks [@darshanr0107](https://github.com/darshanr0107)! - fix: Resolve gantt chart crash due to invalid array length
-
-- [#6918](https://github.com/mermaid-js/mermaid/pull/6918) [`cfe9238`](https://github.com/mermaid-js/mermaid/commit/cfe9238882cbe95416db1feea3112456a71b6aaf) Thanks [@shubhamparikh2704](https://github.com/shubhamparikh2704)! - chore: revert marked dependency from ^15.0.7 to ^16.0.0
-  - Reverted marked package version to ^16.0.0 for better compatibility
-  - This is a dependency update that maintains API compatibility
-  - All tests pass with the updated version
-
 ## 11.11.0
 
 ### Minor Changes

packages/tiny/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@mermaid-js/tiny",
-  "version": "11.12.0",
+  "version": "11.11.0",
   "description": "Tiny version of mermaid",
   "type": "commonjs",
   "main": "./dist/mermaid.tiny.js",