Temporary alternative for https://www.npmjs.com/package/astro-diagram (which needs fixes merged)

Enables using MermaidJS diagrams inline in .md(x) files in Astro. Utilizing Playwright during build time, the HTML for diagrams is generated, and the snippets replaced.

npm install astro-mermaidjs

yarn install astro-mermaidjs

pnpm install astro-mermaidjs

In your astro.config.{ts,mjs}:

import remarkMermaid from 'astro-mermaidjs/remark-mermaid';
// ...

export default defineConfig({
  // ...
  markdown: {
    remarkPlugins: [
      // ...
      remarkMermaid,
    ],
  },
  // ...
});

Then in .md(x) files, use the regular mermaid DSL like you would on Github or other mermaid-supporting markdown flavors:

```mermaid
sequenceDiagram
    Client-->Server: ping
    Server-->Client: pong
```