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d2-filter

d2-filter is a pandoc filter that adds D2 syntax diagrams in markdown documents.

Example

~~~{.d2 pad=20}
x -> y
~~~

Output

Usage

# Installation
npm i -g d2-filter

# Unix
pandoc -F d2-filter test.md -o test.pdf
# Windows
pandoc -F d2-filter.cmd test.md -o test.pdf

If using with Quarto, you can use quarto-d2 to avoid issues with pandoc filters.

Configuration

Using attributes of the fenced code block, you can specify:

  • Theme
    • Example: {.d2 theme="Grape soda"}.
    • Default: 0 or Neutral default
    • Values: Run d2 themes for possible options.
  • Layout engine
    • Example: {.d2 layout=elk}.
    • Default: dagre
    • Values: Run d2 layout for possible options.
  • Image format
    • Example: {.d2 format=png}
    • Default: svg
    • Values: svg, png, pdf
  • Sketch
    • Example: {.d2 sketch=true}
    • Default: false
  • Image padding
    • Example: {.d2 pad=0}
    • Default: 100
  • Folder
    • Example: {.d2 folder=img}
    • Default: no folder as image is encoded to data URI on img tag
  • Filename
    • Example: {.d2 filename="test"}
    • Default: diagram-N
    • folder attribute is required to save file locally
  • Pandoc caption
    • Example: {.d2 caption="This is a test image"}
    • Default: empty string
  • Pandoc image attributes
    • Example: {.d2 width=30 height=20px}
    • Default: empty array
    • Values: See pandoc's link_attributes extension
    • Note that #id and .class attributes are not supported, but any key-value attributes should work

Credits

License

MIT