mermaid/docs/developer-docs/configuration.md

Configuration

When mermaid starts configuration is extracted to a configuration to be used for a diagram. There are 3 sources for configuration:

• The default configuration
• Overrides on the site level is set by the initialize call and will be applied to all diagrams in the site/app. The term for this is the siteConfig.
• Directives - diagram authors can update select configuration parameters directly in the diagram code via directives and these are applied to the render config.

The render config is configuration that is used when rendering by applying these configurations.

Theme configuration

Starting mermaid

sequenceDiagram
	Site->>mermaid: initialize
	Site->>mermaid: content loaded
	mermaid->>mermaidAPI: init

Initialize

Initialize call is called only once. It is called by the site integrator in order to override the default configuration on a site level.

configApi.reset

This method resets the configuration for a diagram to the site configuration, the configuration provided by the site integrator. Before each rendering of a diagram reset is called in the very beginning of render.