Antora Mermaid Extension

NOTE: Migration to 0.0.4 and newer might require you to update to antora-playbook.yaml. See Migration to 0.0.4.

This extension visualizes Listing Blocks and Literal Blocks of Mermaid on HTML files.

[mermaid]
....
sequenceDiagram
autonumber

participant a as Alice
participant b as Bob

a ->>+ b : Hello.
b -->>- a : Hi, there.
....

You can also specify width and height of outer div of svg like:

[mermaid,width=100%]
....
sequenceDiagram
autonumber

participant a as Alice
participant b as Bob

a ->>+ b : Hello.
b -->>- a : Hi, there.
....

Better privacy: This extension uses mermaid.min.js to convert mermaid diagram text on HTML into SVG. So the diagram texts won't be sent to anywhere to create image files.

Configuration

npm

Install this extension

npm i -D @sntke/antora-mermaid-extension

Playbook

Append following in your antora-playbook.yaml:

antora:
  extensions:
    - require: '@sntke/antora-mermaid-extension' # <1>
      mermaid_library_url: https://cdn.jsdelivr.net/npm/mermaid@10/dist/mermaid.esm.min.mjs # <2>
      script_stem: header-scripts # <3>
      mermaid_initialize_options: # <4>
        start_on_load: true

• <1> `npm` package name: `@sntke/antora-mermaid-extension` (required)
• <2> URL of Mermaid.js library (optional)
• <3> Stem that exists in the handlebar templates of UI bundle where HTML script element for `mermaid.js` is placed. (optional)
• <4> The argument to mermaid.initialize(). (optional) Make sure to convert the Mermaid config keys to snake case, e.g., `startOnLoad` -> `start_on_load` or `themeVariables` -> `theme_variables`. Refer to [the Antora docs](https://docs.antora.org/antora/latest/extend/configure-extension/#configuration-key-transformation) for details.

Migration to 0.0.4 and newer

If you set .antora.extensions[].mermaid_library_url in antora-playbook.yaml, update the value to use mermaid@10.

antora-mermaid-extension@0.0.4 uses mermaid@10 which have dropped CJS support.