Need for getConfig in mermaid API

[Wiskerke]

Since mermaidAPI is deprecated, and there is comment in the code asking me to start a discussion, I guess that is what I'm doing.

I am currently working on making a small change to integrate mermaid a bit better into SilverBullet.

What I am doing there, is that I want to get the 'background' color from the active theme and use that as the background color of the diagram.

A bit of simplified code what I'm doing:

  mermaid.initialize(initCfg);
  mermaid.run().then(() => {
    const bg = mermaid.mermaidAPI.getConfig()?.themeVariables?.background;
    if (bg) {
      document.querySelectorAll("svg").forEach(svg => {
        svg.style.background = bg;
      });
    }
  });

And using the mermaidAPI seemed the most straightforward to do this. Although that could be a lack of knowledge on my side.

[EmnaBarbouch]

This is a valid need. Being able to read back the active config, especially theme variables like background, is useful for integrations that need to adapt their own rendering to match the active Mermaid theme.

As an alternative to mermaidAPI.getConfig(), you might be able to access the current config through mermaid.mermaidAPI directly if it's still partially available, or hook into the render callback where some theme context is exposed. That said, these are workarounds and a proper getConfig() on the main mermaid object would be the clean solution.