diff --git a/docs/community/newDiagram.md b/docs/community/newDiagram.md
index ba52999f4..5dd616e66 100644
--- a/docs/community/newDiagram.md
+++ b/docs/community/newDiagram.md
@@ -10,7 +10,7 @@
 
 #### Grammar
 
-This would be to define a jison grammar for the new diagram type. That should start with a way to identify that the text in the mermaid tag is a diagram of that type. Create a new folder under diagrams for your new diagram type and a parser folder in it. This leads us to step 2.
+This would be to define a JISON grammar for the new diagram type. That should start with a way to identify that the text in the mermaid tag is a diagram of that type. Create a new folder under diagrams for your new diagram type and a parser folder in it. This leads us to step 2.
 
 For instance:
 
@@ -60,7 +60,7 @@ Place the renderer in the diagram folder.
 
 ### Step 3: Detection of the new diagram type
 
-The second thing to do is to add the capability to detect the new diagram to type to the detectType in utils.js. The detection should return a key for the new diagram type.
+The second thing to do is to add the capability to detect the new diagram to type to the detectType in `diagram-api/detectType.ts`. The detection should return a key for the new diagram type.
 [This key will be used to as the aria roledescription](#aria-roledescription), so it should be a word that clearly describes the diagram type.
 For example, if your new diagram use a UML deployment diagram, a good key would be "UMLDeploymentDiagram" because assistive technologies such as a screen reader
 would voice that as "U-M-L Deployment diagram." Another good key would be "deploymentDiagram" because that would be voiced as "Deployment Diagram." A bad key would be "deployment" because that would not sufficiently describe the diagram.
diff --git a/docs/config/setup/modules/mermaidAPI.md b/docs/config/setup/modules/mermaidAPI.md
index 330c136dc..1160a5dda 100644
--- a/docs/config/setup/modules/mermaidAPI.md
+++ b/docs/config/setup/modules/mermaidAPI.md
@@ -96,7 +96,7 @@ mermaid.initialize(config);
 
 #### Defined in
 
-[mermaidAPI.ts:669](https://github.com/mermaid-js/mermaid/blob/master/packages/mermaid/src/mermaidAPI.ts#L669)
+[mermaidAPI.ts:668](https://github.com/mermaid-js/mermaid/blob/master/packages/mermaid/src/mermaidAPI.ts#L668)
 
 ## Functions
 
@@ -127,7 +127,7 @@ Return the last node appended
 
 #### Defined in
 
-[mermaidAPI.ts:310](https://github.com/mermaid-js/mermaid/blob/master/packages/mermaid/src/mermaidAPI.ts#L310)
+[mermaidAPI.ts:309](https://github.com/mermaid-js/mermaid/blob/master/packages/mermaid/src/mermaidAPI.ts#L309)
 
 ---
 
@@ -153,7 +153,7 @@ the cleaned up svgCode
 
 #### Defined in
 
-[mermaidAPI.ts:256](https://github.com/mermaid-js/mermaid/blob/master/packages/mermaid/src/mermaidAPI.ts#L256)
+[mermaidAPI.ts:255](https://github.com/mermaid-js/mermaid/blob/master/packages/mermaid/src/mermaidAPI.ts#L255)
 
 ---
 
@@ -179,7 +179,7 @@ the string with all the user styles
 
 #### Defined in
 
-[mermaidAPI.ts:185](https://github.com/mermaid-js/mermaid/blob/master/packages/mermaid/src/mermaidAPI.ts#L185)
+[mermaidAPI.ts:184](https://github.com/mermaid-js/mermaid/blob/master/packages/mermaid/src/mermaidAPI.ts#L184)
 
 ---
 
@@ -202,7 +202,7 @@ the string with all the user styles
 
 #### Defined in
 
-[mermaidAPI.ts:233](https://github.com/mermaid-js/mermaid/blob/master/packages/mermaid/src/mermaidAPI.ts#L233)
+[mermaidAPI.ts:232](https://github.com/mermaid-js/mermaid/blob/master/packages/mermaid/src/mermaidAPI.ts#L232)
 
 ---
 
@@ -229,7 +229,7 @@ with an enclosing block that has each of the cssClasses followed by !important;
 
 #### Defined in
 
-[mermaidAPI.ts:169](https://github.com/mermaid-js/mermaid/blob/master/packages/mermaid/src/mermaidAPI.ts#L169)
+[mermaidAPI.ts:168](https://github.com/mermaid-js/mermaid/blob/master/packages/mermaid/src/mermaidAPI.ts#L168)
 
 ---
 
@@ -249,7 +249,7 @@ with an enclosing block that has each of the cssClasses followed by !important;
 
 #### Defined in
 
-[mermaidAPI.ts:155](https://github.com/mermaid-js/mermaid/blob/master/packages/mermaid/src/mermaidAPI.ts#L155)
+[mermaidAPI.ts:154](https://github.com/mermaid-js/mermaid/blob/master/packages/mermaid/src/mermaidAPI.ts#L154)
 
 ---
 
@@ -269,7 +269,7 @@ with an enclosing block that has each of the cssClasses followed by !important;
 
 #### Defined in
 
-[mermaidAPI.ts:126](https://github.com/mermaid-js/mermaid/blob/master/packages/mermaid/src/mermaidAPI.ts#L126)
+[mermaidAPI.ts:125](https://github.com/mermaid-js/mermaid/blob/master/packages/mermaid/src/mermaidAPI.ts#L125)
 
 ---
 
@@ -295,7 +295,7 @@ Put the svgCode into an iFrame. Return the iFrame code
 
 #### Defined in
 
-[mermaidAPI.ts:287](https://github.com/mermaid-js/mermaid/blob/master/packages/mermaid/src/mermaidAPI.ts#L287)
+[mermaidAPI.ts:286](https://github.com/mermaid-js/mermaid/blob/master/packages/mermaid/src/mermaidAPI.ts#L286)
 
 ---
 
@@ -320,4 +320,4 @@ Remove any existing elements from the given document
 
 #### Defined in
 
-[mermaidAPI.ts:360](https://github.com/mermaid-js/mermaid/blob/master/packages/mermaid/src/mermaidAPI.ts#L360)
+[mermaidAPI.ts:359](https://github.com/mermaid-js/mermaid/blob/master/packages/mermaid/src/mermaidAPI.ts#L359)
diff --git a/packages/mermaid/src/Diagram.ts b/packages/mermaid/src/Diagram.ts
index 4fb329b28..13fd3232b 100644
--- a/packages/mermaid/src/Diagram.ts
+++ b/packages/mermaid/src/Diagram.ts
@@ -4,8 +4,9 @@ import { getDiagram, registerDiagram } from './diagram-api/diagramAPI.js';
 import { detectType, getDiagramLoader } from './diagram-api/detectType.js';
 import { extractFrontMatter } from './diagram-api/frontmatter.js';
 import { UnknownDiagramError } from './errors.js';
-import { DetailedError } from './utils.js';
 import { cleanupComments } from './diagram-api/comments.js';
+import type { DetailedError } from './utils.js';
+import type { DiagramDefinition } from './diagram-api/types.js';
 
 export type ParseErrorFunction = (err: string | DetailedError | unknown, hash?: any) => void;
 
@@ -15,9 +16,11 @@ export type ParseErrorFunction = (err: string | DetailedError | unknown, hash?:
  */
 export class Diagram {
   type = 'graph';
-  parser;
-  renderer;
-  db;
+  parser: DiagramDefinition['parser'];
+  renderer: DiagramDefinition['renderer'];
+  db: DiagramDefinition['db'];
+  private init?: DiagramDefinition['init'];
+
   private detectError?: UnknownDiagramError;
   constructor(public text: string) {
     this.text += '\n';
@@ -32,7 +35,6 @@ export class Diagram {
     log.debug('Type ' + this.type);
     // Setup diagram
     this.db = diagram.db;
-    this.db.clear?.();
     this.renderer = diagram.renderer;
     this.parser = diagram.parser;
     const originalParse = this.parser.parse.bind(this.parser);
@@ -49,10 +51,7 @@ export class Diagram {
       originalParse(cleanupComments(extractFrontMatter(text, this.db)));
 
     this.parser.parser.yy = this.db;
-    if (diagram.init) {
-      diagram.init(cnf);
-      log.info('Initialized diagram ' + this.type, cnf);
-    }
+    this.init = diagram.init;
     this.parse();
   }
 
@@ -61,6 +60,7 @@ export class Diagram {
       throw this.detectError;
     }
     this.db.clear?.();
+    this.init?.(configApi.getConfig());
     this.parser.parse(this.text);
   }
 
diff --git a/packages/mermaid/src/diagram-api/diagramAPI.spec.ts b/packages/mermaid/src/diagram-api/diagramAPI.spec.ts
index 49bde1a66..b437745cf 100644
--- a/packages/mermaid/src/diagram-api/diagramAPI.spec.ts
+++ b/packages/mermaid/src/diagram-api/diagramAPI.spec.ts
@@ -35,7 +35,12 @@ describe('DiagramAPI', () => {
       'loki',
       {
         db: {},
-        parser: {},
+        parser: {
+          parse: (_text) => {
+            return;
+          },
+          parser: { yy: {} },
+        },
         renderer: {},
         styles: {},
       },
diff --git a/packages/mermaid/src/diagram-api/diagramAPI.ts b/packages/mermaid/src/diagram-api/diagramAPI.ts
index 7e89d9cd7..3edd982bb 100644
--- a/packages/mermaid/src/diagram-api/diagramAPI.ts
+++ b/packages/mermaid/src/diagram-api/diagramAPI.ts
@@ -69,11 +69,11 @@ export const getDiagram = (name: string): DiagramDefinition => {
   if (name in diagrams) {
     return diagrams[name];
   }
-  throw new Error(`Diagram ${name} not found.`);
+  throw new DiagramNotFoundError(name);
 };
 
 export class DiagramNotFoundError extends Error {
-  constructor(message: string) {
-    super(`Diagram ${message} not found.`);
+  constructor(name: string) {
+    super(`Diagram ${name} not found.`);
   }
 }
diff --git a/packages/mermaid/src/diagram-api/types.ts b/packages/mermaid/src/diagram-api/types.ts
index 860e965ac..100b92e87 100644
--- a/packages/mermaid/src/diagram-api/types.ts
+++ b/packages/mermaid/src/diagram-api/types.ts
@@ -1,5 +1,5 @@
 import { Diagram } from '../Diagram.js';
-import { MermaidConfig } from '../config.type.js';
+import type { MermaidConfig } from '../config.type.js';
 import type * as d3 from 'd3';
 
 export interface InjectUtils {
@@ -27,7 +27,7 @@ export interface DiagramDB {
 export interface DiagramDefinition {
   db: DiagramDB;
   renderer: any;
-  parser: any;
+  parser: ParserDefinition;
   styles?: any;
   init?: (config: MermaidConfig) => void;
   injectUtils?: (
@@ -70,6 +70,11 @@ export type DrawDefinition = (
   diagramObject: Diagram
 ) => void;
 
+export interface ParserDefinition {
+  parse: (text: string) => void;
+  parser: { yy: DiagramDB };
+}
+
 /**
  * Type for function parse directive from diagram code.
  *
diff --git a/packages/mermaid/src/diagrams/er/erRenderer.js b/packages/mermaid/src/diagrams/er/erRenderer.js
index 63fb05633..b992afd65 100644
--- a/packages/mermaid/src/diagrams/er/erRenderer.js
+++ b/packages/mermaid/src/diagrams/er/erRenderer.js
@@ -555,7 +555,6 @@ const drawRelationshipFromLayout = function (svg, rel, g, insert, diagObj) {
 export const draw = function (text, id, _version, diagObj) {
   conf = getConfig().er;
   log.info('Drawing ER diagram');
-  //  diag.db.clear();
   const securityLevel = getConfig().securityLevel;
   // Handle root and Document for when rendering in sandbox mode
   let sandboxElement;
diff --git a/packages/mermaid/src/diagrams/error/errorDiagram.ts b/packages/mermaid/src/diagrams/error/errorDiagram.ts
index 76efdb0ae..284dfd744 100644
--- a/packages/mermaid/src/diagrams/error/errorDiagram.ts
+++ b/packages/mermaid/src/diagrams/error/errorDiagram.ts
@@ -1,23 +1,15 @@
-import { DiagramDefinition } from '../../diagram-api/types.js';
-import styles from './styles.js';
-import renderer from './errorRenderer.js';
-export const diagram: DiagramDefinition = {
-  db: {
-    clear: () => {
-      // Quite ok, clear needs to be there for error to work as a regular diagram
-    },
-  },
-  styles,
+import type { DiagramDefinition } from '../../diagram-api/types.js';
+import { renderer } from './errorRenderer.js';
+
+const diagram: DiagramDefinition = {
+  db: {},
   renderer,
   parser: {
     parser: { yy: {} },
-    parse: () => {
-      // no op
+    parse: (): void => {
+      return;
     },
   },
-  init: () => {
-    // no op
-  },
 };
 
 export default diagram;
diff --git a/packages/mermaid/src/diagrams/error/errorRenderer.ts b/packages/mermaid/src/diagrams/error/errorRenderer.ts
index aa0e9e816..ebe0d0d73 100644
--- a/packages/mermaid/src/diagrams/error/errorRenderer.ts
+++ b/packages/mermaid/src/diagrams/error/errorRenderer.ts
@@ -1,100 +1,81 @@
-/** Created by knut on 14-12-11. */
-// @ts-ignore TODO: Investigate D3 issue
-import { select } from 'd3';
 import { log } from '../../logger.js';
-import { getErrorMessage } from '../../utils.js';
-
-/**
- * Merges the value of `conf` with the passed `cnf`
- *
- * @param cnf - Config to merge
- */
-export const setConf = function () {
-  // no-op
-};
+import type { Group, SVG } from '../../diagram-api/types.js';
+import { selectSvgElement } from '../../rendering-util/selectSvgElement.js';
+import { configureSvgSize } from '../../setupGraphViewbox.js';
 
 /**
  * Draws a an info picture in the tag with id: id based on the graph definition in text.
  *
  * @param _text - Mermaid graph definition.
  * @param id - The text for the error
- * @param mermaidVersion - The version
+ * @param version - The version
  */
-export const draw = (_text: string, id: string, mermaidVersion: string) => {
-  try {
-    log.debug('Renering svg for syntax error\n');
+export const draw = (_text: string, id: string, version: string) => {
+  log.debug('renering svg for syntax error\n');
 
-    const svg = select('#' + id);
+  const svg: SVG = selectSvgElement(id);
+  svg.attr('viewBox', '768 0 912 512');
+  configureSvgSize(svg, 100, 500, true);
 
-    const g = svg.append('g');
+  const g: Group = svg.append('g');
+  g.append('path')
+    .attr('class', 'error-icon')
+    .attr(
+      'd',
+      'm411.313,123.313c6.25-6.25 6.25-16.375 0-22.625s-16.375-6.25-22.625,0l-32,32-9.375,9.375-20.688-20.688c-12.484-12.5-32.766-12.5-45.25,0l-16,16c-1.261,1.261-2.304,2.648-3.31,4.051-21.739-8.561-45.324-13.426-70.065-13.426-105.867,0-192,86.133-192,192s86.133,192 192,192 192-86.133 192-192c0-24.741-4.864-48.327-13.426-70.065 1.402-1.007 2.79-2.049 4.051-3.31l16-16c12.5-12.492 12.5-32.758 0-45.25l-20.688-20.688 9.375-9.375 32.001-31.999zm-219.313,100.687c-52.938,0-96,43.063-96,96 0,8.836-7.164,16-16,16s-16-7.164-16-16c0-70.578 57.422-128 128-128 8.836,0 16,7.164 16,16s-7.164,16-16,16z'
+    );
 
-    g.append('path')
-      .attr('class', 'error-icon')
-      .attr(
-        'd',
-        'm411.313,123.313c6.25-6.25 6.25-16.375 0-22.625s-16.375-6.25-22.625,0l-32,32-9.375,9.375-20.688-20.688c-12.484-12.5-32.766-12.5-45.25,0l-16,16c-1.261,1.261-2.304,2.648-3.31,4.051-21.739-8.561-45.324-13.426-70.065-13.426-105.867,0-192,86.133-192,192s86.133,192 192,192 192-86.133 192-192c0-24.741-4.864-48.327-13.426-70.065 1.402-1.007 2.79-2.049 4.051-3.31l16-16c12.5-12.492 12.5-32.758 0-45.25l-20.688-20.688 9.375-9.375 32.001-31.999zm-219.313,100.687c-52.938,0-96,43.063-96,96 0,8.836-7.164,16-16,16s-16-7.164-16-16c0-70.578 57.422-128 128-128 8.836,0 16,7.164 16,16s-7.164,16-16,16z'
-      );
+  g.append('path')
+    .attr('class', 'error-icon')
+    .attr(
+      'd',
+      'm459.02,148.98c-6.25-6.25-16.375-6.25-22.625,0s-6.25,16.375 0,22.625l16,16c3.125,3.125 7.219,4.688 11.313,4.688 4.094,0 8.188-1.563 11.313-4.688 6.25-6.25 6.25-16.375 0-22.625l-16.001-16z'
+    );
 
-    g.append('path')
-      .attr('class', 'error-icon')
-      .attr(
-        'd',
-        'm459.02,148.98c-6.25-6.25-16.375-6.25-22.625,0s-6.25,16.375 0,22.625l16,16c3.125,3.125 7.219,4.688 11.313,4.688 4.094,0 8.188-1.563 11.313-4.688 6.25-6.25 6.25-16.375 0-22.625l-16.001-16z'
-      );
+  g.append('path')
+    .attr('class', 'error-icon')
+    .attr(
+      'd',
+      'm340.395,75.605c3.125,3.125 7.219,4.688 11.313,4.688 4.094,0 8.188-1.563 11.313-4.688 6.25-6.25 6.25-16.375 0-22.625l-16-16c-6.25-6.25-16.375-6.25-22.625,0s-6.25,16.375 0,22.625l15.999,16z'
+    );
 
-    g.append('path')
-      .attr('class', 'error-icon')
-      .attr(
-        'd',
-        'm340.395,75.605c3.125,3.125 7.219,4.688 11.313,4.688 4.094,0 8.188-1.563 11.313-4.688 6.25-6.25 6.25-16.375 0-22.625l-16-16c-6.25-6.25-16.375-6.25-22.625,0s-6.25,16.375 0,22.625l15.999,16z'
-      );
+  g.append('path')
+    .attr('class', 'error-icon')
+    .attr(
+      'd',
+      'm400,64c8.844,0 16-7.164 16-16v-32c0-8.836-7.156-16-16-16-8.844,0-16,7.164-16,16v32c0,8.836 7.156,16 16,16z'
+    );
 
-    g.append('path')
-      .attr('class', 'error-icon')
-      .attr(
-        'd',
-        'm400,64c8.844,0 16-7.164 16-16v-32c0-8.836-7.156-16-16-16-8.844,0-16,7.164-16,16v32c0,8.836 7.156,16 16,16z'
-      );
+  g.append('path')
+    .attr('class', 'error-icon')
+    .attr(
+      'd',
+      'm496,96.586h-32c-8.844,0-16,7.164-16,16 0,8.836 7.156,16 16,16h32c8.844,0 16-7.164 16-16 0-8.836-7.156-16-16-16z'
+    );
 
-    g.append('path')
-      .attr('class', 'error-icon')
-      .attr(
-        'd',
-        'm496,96.586h-32c-8.844,0-16,7.164-16,16 0,8.836 7.156,16 16,16h32c8.844,0 16-7.164 16-16 0-8.836-7.156-16-16-16z'
-      );
+  g.append('path')
+    .attr('class', 'error-icon')
+    .attr(
+      'd',
+      'm436.98,75.605c3.125,3.125 7.219,4.688 11.313,4.688 4.094,0 8.188-1.563 11.313-4.688l32-32c6.25-6.25 6.25-16.375 0-22.625s-16.375-6.25-22.625,0l-32,32c-6.251,6.25-6.251,16.375-0.001,22.625z'
+    );
 
-    g.append('path')
-      .attr('class', 'error-icon')
-      .attr(
-        'd',
-        'm436.98,75.605c3.125,3.125 7.219,4.688 11.313,4.688 4.094,0 8.188-1.563 11.313-4.688l32-32c6.25-6.25 6.25-16.375 0-22.625s-16.375-6.25-22.625,0l-32,32c-6.251,6.25-6.251,16.375-0.001,22.625z'
-      );
-
-    g.append('text') // text label for the x axis
-      .attr('class', 'error-text')
-      .attr('x', 1440)
-      .attr('y', 250)
-      .attr('font-size', '150px')
-      .style('text-anchor', 'middle')
-      .text('Syntax error in text');
-    g.append('text') // text label for the x axis
-      .attr('class', 'error-text')
-      .attr('x', 1250)
-      .attr('y', 400)
-      .attr('font-size', '100px')
-      .style('text-anchor', 'middle')
-      .text('mermaid version ' + mermaidVersion);
-
-    svg.attr('height', 100);
-    svg.attr('width', 500);
-    svg.attr('viewBox', '768 0 912 512');
-  } catch (e) {
-    log.error('Error while rendering info diagram');
-    log.error(getErrorMessage(e));
-  }
+  g.append('text') // text label for the x axis
+    .attr('class', 'error-text')
+    .attr('x', 1440)
+    .attr('y', 250)
+    .attr('font-size', '150px')
+    .style('text-anchor', 'middle')
+    .text('Syntax error in text');
+  g.append('text') // text label for the x axis
+    .attr('class', 'error-text')
+    .attr('x', 1250)
+    .attr('y', 400)
+    .attr('font-size', '100px')
+    .style('text-anchor', 'middle')
+    .text(`mermaid version ${version}`);
 };
 
-export default {
-  setConf,
-  draw,
-};
+export const renderer = { draw };
+
+export default renderer;
diff --git a/packages/mermaid/src/diagrams/error/styles.js b/packages/mermaid/src/diagrams/error/styles.js
deleted file mode 100644
index 0b0729813..000000000
--- a/packages/mermaid/src/diagrams/error/styles.js
+++ /dev/null
@@ -1,3 +0,0 @@
-const getStyles = () => ``;
-
-export default getStyles;
diff --git a/packages/mermaid/src/diagrams/flowchart/elk/flowRenderer-elk.js b/packages/mermaid/src/diagrams/flowchart/elk/flowRenderer-elk.js
index 5ed06723e..c7bfdf524 100644
--- a/packages/mermaid/src/diagrams/flowchart/elk/flowRenderer-elk.js
+++ b/packages/mermaid/src/diagrams/flowchart/elk/flowRenderer-elk.js
@@ -655,14 +655,7 @@ const addMarkersToEdge = function (svgPath, edgeData, diagramType, arrowMarkerAb
  */
 export const getClasses = function (text, diagObj) {
   log.info('Extracting classes');
-  diagObj.db.clear('ver-2');
-  try {
-    // Parse the graph definition
-    diagObj.parse(text);
-    return diagObj.db.getClasses();
-  } catch (e) {
-    return {};
-  }
+  return diagObj.db.getClasses();
 };
 
 const addSubGraphs = function (db) {
@@ -766,14 +759,8 @@ const insertChildren = (nodeArray, parentLookupDb) => {
  */
 
 export const draw = async function (text, id, _version, diagObj) {
-  // Add temporary render element
-  diagObj.db.clear();
   nodeDb = {};
   portPos = {};
-  diagObj.db.setGen('gen-2');
-  // Parse the graph definition
-  diagObj.parser.parse(text);
-
   const renderEl = select('body').append('div').attr('style', 'height:400px').attr('id', 'cy');
   let graph = {
     id: 'root',
diff --git a/packages/mermaid/src/diagrams/flowchart/flowRenderer-v2.js b/packages/mermaid/src/diagrams/flowchart/flowRenderer-v2.js
index 23f94942c..4a3b7a8ce 100644
--- a/packages/mermaid/src/diagrams/flowchart/flowRenderer-v2.js
+++ b/packages/mermaid/src/diagrams/flowchart/flowRenderer-v2.js
@@ -1,10 +1,7 @@
 import * as graphlib from 'dagre-d3-es/src/graphlib/index.js';
 import { select, curveLinear, selectAll } from 'd3';
-
-import flowDb from './flowDb.js';
 import { getConfig } from '../../config.js';
 import utils from '../../utils.js';
-
 import { render } from '../../dagre-wrapper/index.js';
 import { addHtmlLabel } from 'dagre-d3-es/src/dagre-js/label/add-html-label.js';
 import { log } from '../../logger.js';
@@ -344,15 +341,7 @@ export const addEdges = function (edges, g, diagObj) {
  * @returns {object} ClassDef styles
  */
 export const getClasses = function (text, diagObj) {
-  log.info('Extracting classes');
-  diagObj.db.clear();
-  try {
-    // Parse the graph definition
-    diagObj.parse(text);
-    return diagObj.db.getClasses();
-  } catch (e) {
-    return;
-  }
+  return diagObj.db.getClasses();
 };
 
 /**
@@ -364,10 +353,6 @@ export const getClasses = function (text, diagObj) {
 
 export const draw = async function (text, id, _version, diagObj) {
   log.info('Drawing flowchart');
-  diagObj.db.clear();
-  flowDb.setGen('gen-2');
-  // Parse the graph definition
-  diagObj.parser.parse(text);
 
   // Fetch the default direction, use TD if none was found
   let dir = diagObj.db.getDirection();
diff --git a/packages/mermaid/src/diagrams/flowchart/flowRenderer.js b/packages/mermaid/src/diagrams/flowchart/flowRenderer.js
index 4382aa9a4..fc06cacd4 100644
--- a/packages/mermaid/src/diagrams/flowchart/flowRenderer.js
+++ b/packages/mermaid/src/diagrams/flowchart/flowRenderer.js
@@ -273,15 +273,7 @@ export const addEdges = function (edges, g, diagObj) {
  */
 export const getClasses = function (text, diagObj) {
   log.info('Extracting classes');
-  diagObj.db.clear();
-  try {
-    // Parse the graph definition
-    diagObj.parse(text);
-    return diagObj.db.getClasses();
-  } catch (e) {
-    log.error(e);
-    return {};
-  }
+  return diagObj.db.getClasses();
 };
 
 /**
@@ -294,7 +286,6 @@ export const getClasses = function (text, diagObj) {
  */
 export const draw = function (text, id, _version, diagObj) {
   log.info('Drawing flowchart');
-  diagObj.db.clear();
   const { securityLevel, flowchart: conf } = getConfig();
   let sandboxElement;
   if (securityLevel === 'sandbox') {
diff --git a/packages/mermaid/src/diagrams/sequence/sequenceDiagram.spec.js b/packages/mermaid/src/diagrams/sequence/sequenceDiagram.spec.js
index 8b7d6f8d0..0b84fbe35 100644
--- a/packages/mermaid/src/diagrams/sequence/sequenceDiagram.spec.js
+++ b/packages/mermaid/src/diagrams/sequence/sequenceDiagram.spec.js
@@ -172,14 +172,11 @@ describe('more than one sequence diagram', () => {
 
 describe('when parsing a sequenceDiagram', function () {
   beforeEach(function () {
-    // diagram.db = sequenceDb;
-    // diagram.db.clear();
     diagram = new Diagram(`
 sequenceDiagram
 Alice->Bob:Hello Bob, how are you?
 Note right of Bob: Bob thinks
 Bob-->Alice: I am good thanks!`);
-    diagram.db.clear();
   });
   it('should handle a sequenceDiagram definition', async function () {
     const str = `
@@ -1482,8 +1479,6 @@ describe('when checking the bounds in a sequenceDiagram', function () {
   let conf;
   beforeEach(function () {
     mermaidAPI.reset();
-    // diagram.db = sequenceDb;
-    // diagram.db.clear();
     diagram.renderer.bounds.init();
     conf = diagram.db.getConfig();
   });
@@ -1635,7 +1630,6 @@ sequenceDiagram
 Alice->Bob:Hello Bob, how are you?
 Note right of Bob: Bob thinks
 Bob-->Alice: I am good thanks!`);
-    diagram.db.clear();
   });
   ['tspan', 'fo', 'old', undefined].forEach(function (textPlacement) {
     it(`
@@ -2009,8 +2003,6 @@ describe('when rendering a sequenceDiagram with actor mirror activated', () => {
   let conf;
   beforeEach(function () {
     mermaidAPI.reset();
-    // diagram.db = sequenceDb;
-    diagram.db.clear();
     conf = diagram.db.getConfig();
     diagram.renderer.bounds.init();
   });
@@ -2052,12 +2044,8 @@ describe('when rendering a sequenceDiagram with directives', () => {
     mermaidAPI.initialize({ sequence: conf });
   });
 
-  let conf;
   beforeEach(function () {
     mermaidAPI.reset();
-    // diagram.db = sequenceDb;
-    diagram.db.clear();
-    conf = diagram.db.getConfig();
     diagram.renderer.bounds.init();
   });
 
@@ -2069,10 +2057,7 @@ sequenceDiagram
 participant Alice
 `;
     diagram = new Diagram(str);
-
     diagram.renderer.bounds.init();
-    await mermaidAPI.parse(str);
-
     diagram.renderer.draw(str, 'tst', '1.2.3', diagram);
 
     const { bounds, models } = diagram.renderer.bounds.getBounds();
@@ -2093,7 +2078,7 @@ sequenceDiagram
 participant Alice
 `;
 
-    diagram.parse(str);
+    diagram = new Diagram(str);
     diagram.renderer.draw(str, 'tst', '1.2.3', diagram);
 
     const { bounds, models } = diagram.renderer.bounds.getBounds();
@@ -2114,7 +2099,7 @@ Alice->Bob:Hello Bob, how are you?
 Note right of Bob: Bob thinks
 Bob-->Alice: I am good thanks!`;
 
-    await mermaidAPI.parse(str1);
+    diagram = new Diagram(str1);
     diagram.renderer.draw(str1, 'tst', '1.2.3', diagram); // needs to be rendered for the correct value of visibility auto numbers
     expect(diagram.db.showSequenceNumbers()).toBe(true);
 
@@ -2124,7 +2109,7 @@ Alice->Bob:Hello Bob, how are you?
 Note right of Bob: Bob thinks
 Bob-->Alice: I am good thanks!`;
 
-    await mermaidAPI.parse(str2);
+    diagram = new Diagram(str2);
     diagram.renderer.draw(str2, 'tst', '1.2.3', diagram);
     expect(diagram.db.showSequenceNumbers()).toBe(false);
   });
diff --git a/packages/mermaid/src/diagrams/sequence/sequenceRenderer.ts b/packages/mermaid/src/diagrams/sequence/sequenceRenderer.ts
index 4f8b1889b..f6fde5001 100644
--- a/packages/mermaid/src/diagrams/sequence/sequenceRenderer.ts
+++ b/packages/mermaid/src/diagrams/sequence/sequenceRenderer.ts
@@ -749,9 +749,6 @@ function adjustCreatedDestroyedData(
 export const draw = function (_text: string, id: string, _version: string, diagObj: Diagram) {
   const { securityLevel, sequence } = configApi.getConfig();
   conf = sequence;
-  diagObj.db.clear();
-  // Parse the graph definition
-  diagObj.parser.parse(_text);
   // Handle root and Document for when rendering in sandbox mode
   let sandboxElement;
   if (securityLevel === 'sandbox') {
diff --git a/packages/mermaid/src/diagrams/state/stateRenderer-v2.js b/packages/mermaid/src/diagrams/state/stateRenderer-v2.js
index 592cb43cc..990048ec7 100644
--- a/packages/mermaid/src/diagrams/state/stateRenderer-v2.js
+++ b/packages/mermaid/src/diagrams/state/stateRenderer-v2.js
@@ -84,17 +84,7 @@ export const setConf = function (cnf) {
  * @returns {object} ClassDef styles (a Map with keys = strings, values = )
  */
 export const getClasses = function (text, diagramObj) {
-  log.trace('Extracting classes');
-  diagramObj.db.clear();
-  try {
-    // Parse the graph definition
-    diagramObj.parser.parse(text);
-    // must run extract() to turn the parsed statements into states, relationships, classes, etc.
-    diagramObj.db.extract(diagramObj.db.getRootDocV2());
-    return diagramObj.db.getClasses();
-  } catch (e) {
-    return e;
-  }
+  return diagramObj.db.getClasses();
 };
 
 /**
@@ -384,7 +374,6 @@ const getDir = (parsedItem, defaultDir = DEFAULT_NESTED_DOC_DIR) => {
  */
 export const draw = async function (text, id, _version, diag) {
   log.info('Drawing state diagram (v2)', id);
-  // diag.sb.clear();
   nodeDb = {};
   // Fetch the default direction, use TD if none was found
   let dir = diag.db.getDirection();
diff --git a/packages/mermaid/src/docs/community/newDiagram.md b/packages/mermaid/src/docs/community/newDiagram.md
index 3393396ee..7fb47dd30 100644
--- a/packages/mermaid/src/docs/community/newDiagram.md
+++ b/packages/mermaid/src/docs/community/newDiagram.md
@@ -4,7 +4,7 @@
 
 #### Grammar
 
-This would be to define a jison grammar for the new diagram type. That should start with a way to identify that the text in the mermaid tag is a diagram of that type. Create a new folder under diagrams for your new diagram type and a parser folder in it. This leads us to step 2.
+This would be to define a JISON grammar for the new diagram type. That should start with a way to identify that the text in the mermaid tag is a diagram of that type. Create a new folder under diagrams for your new diagram type and a parser folder in it. This leads us to step 2.
 
 For instance:
 
@@ -55,7 +55,7 @@ Place the renderer in the diagram folder.
 
 ### Step 3: Detection of the new diagram type
 
-The second thing to do is to add the capability to detect the new diagram to type to the detectType in utils.js. The detection should return a key for the new diagram type.
+The second thing to do is to add the capability to detect the new diagram to type to the detectType in `diagram-api/detectType.ts`. The detection should return a key for the new diagram type.
 [This key will be used to as the aria roledescription](#aria-roledescription), so it should be a word that clearly describes the diagram type.
 For example, if your new diagram use a UML deployment diagram, a good key would be "UMLDeploymentDiagram" because assistive technologies such as a screen reader
 would voice that as "U-M-L Deployment diagram." Another good key would be "deploymentDiagram" because that would be voiced as "Deployment Diagram." A bad key would be "deployment" because that would not sufficiently describe the diagram.
diff --git a/packages/mermaid/src/mermaid.spec.ts b/packages/mermaid/src/mermaid.spec.ts
index e27428545..0b4437d74 100644
--- a/packages/mermaid/src/mermaid.spec.ts
+++ b/packages/mermaid/src/mermaid.spec.ts
@@ -3,6 +3,7 @@ import { mermaidAPI } from './mermaidAPI.js';
 import './diagram-api/diagram-orchestration.js';
 import { addDiagrams } from './diagram-api/diagram-orchestration.js';
 import { beforeAll, describe, it, expect, vi } from 'vitest';
+import type { DiagramDefinition } from './diagram-api/types.js';
 
 beforeAll(async () => {
   addDiagrams();
@@ -92,13 +93,16 @@ describe('when using mermaid and ', () => {
 
     it('should defer diagram load based on parameter', async () => {
       let loaded = false;
-      const dummyDiagram = {
+      const dummyDiagram: DiagramDefinition = {
         db: {},
         renderer: () => {
           // do nothing
         },
-        parser: () => {
-          // do nothing
+        parser: {
+          parse: (_text) => {
+            return;
+          },
+          parser: { yy: {} },
         },
         styles: () => {
           // do nothing
diff --git a/packages/mermaid/src/mermaidAPI.ts b/packages/mermaid/src/mermaidAPI.ts
index 70b314daa..f8a36f88e 100644
--- a/packages/mermaid/src/mermaidAPI.ts
+++ b/packages/mermaid/src/mermaidAPI.ts
@@ -108,8 +108,7 @@ export interface RenderResult {
 async function parse(text: string, parseOptions?: ParseOptions): Promise<boolean> {
   addDiagrams();
   try {
-    const diagram = await getDiagramFromText(text);
-    diagram.parse();
+    await getDiagramFromText(text);
   } catch (error) {
     if (parseOptions?.suppressErrors) {
       return false;
diff --git a/packages/mermaid/src/styles.spec.ts b/packages/mermaid/src/styles.spec.ts
index 51951f190..935341641 100644
--- a/packages/mermaid/src/styles.spec.ts
+++ b/packages/mermaid/src/styles.spec.ts
@@ -19,7 +19,6 @@ import classDiagram from './diagrams/class/styles.js';
 import flowchart from './diagrams/flowchart/styles.js';
 import flowchartElk from './diagrams/flowchart/elk/styles.js';
 import er from './diagrams/er/styles.js';
-import error from './diagrams/error/styles.js';
 import git from './diagrams/git/styles.js';
 import gantt from './diagrams/gantt/styles.js';
 import pie from './diagrams/pie/styles.js';
@@ -86,7 +85,6 @@ describe('styles', () => {
         c4,
         classDiagram,
         er,
-        error,
         flowchart,
         flowchartElk,
         gantt,