jupyterlab-mermaid-latest-extension 1.0.5

Jupyterlab extension that brings the lates version of the mermaid library to the rendering in notebooks and markdown

jupyterlab_mermaid_latest_extension

[!TIP] This extension is part of the stellars_jupyterlab_extensions metapackage. Install all Stellars extensions at once: pip install stellars_jupyterlab_extensions

JupyterLab extension that brings the latest version of the Mermaid diagram library to notebook and markdown rendering. JupyterLab ships with an older bundled Mermaid version - this extension replaces it with the current release so you get access to the newest diagram types, syntax features, and bug fixes.

[!WARNING] This extension works by monkey-patching the built-in IMermaidManager at runtime. It replaces the manager's rendering methods with implementations that use a newer bundled Mermaid library. The built-in Mermaid extension remains loaded but its rendering code is bypassed. This approach may break if JupyterLab changes the IMermaidManager interface in a future major release.

Features

• Latest Mermaid version - renders diagrams with Mermaid 11.15.0, independent of JupyterLab 4.5's bundled 11.12.3
• New diagram types - access beta and recently stabilised Mermaid diagrams (e.g., venn-beta) that the bundled version rejects with UnknownDiagramError
• Transparent replacement - notebooks, markdown cells, and .md files all render through the patched manager
• Theme aware - respects JupyterLab dark/light theme and re-renders on theme change

How It Works

JupyterLab 4 provides an IMermaidManager token that all Mermaid rendering flows through. This extension requires that token, then replaces getMermaid(), renderSvg(), renderFigure(), and getCachedFigure() with its own implementations backed by a force-bundled newer Mermaid library. Since all consumers (notebook renderer, markdown renderer) hold references to the same manager object, they automatically use the patched methods. The built-in @jupyterlab/mermaid-extension stays loaded and enabled - its rendering code is simply bypassed.

Example

A venn-beta diagram, unsupported by JupyterLab's bundled Mermaid, renders with this extension installed:

```mermaid
venn-beta
  title "Effects across KPIs"
  set CV
  set ADG
  set FCR
  union CV,ADG,FCR["Temperature uniformity, Feeder access"]
```

Installation

Requires JupyterLab 4.0.0 or higher.

pip install jupyterlab_mermaid_latest_extension

Uninstall

pip uninstall jupyterlab_mermaid_latest_extension