wasm-pandoc

Looking for maintainer: Johannes Wilm has temporarily taken over maintainership of this package due to there being no package on NPM. However, he knows very little about wasm and haskell and would like for someone else to take this package again.

The latest version of pandoc CLI compiled as a standalone wasm32-wasi module that can be run by browsers.

Live demo

Stdin on the left, stdout on the right, command line arguments at the bottom. No convert button, output is produced dynamically as input changes.

To use

1. Make wasm-pandoc a dependency in your project.json.

2. In your bundler mark "wasm" as an asset/resource. For example in rspack, in your config file:

module.exports = {
    ...
    module: {
        ...
        rules: [
            ...
            {
                test: /\.(wasm)$/,
                type: "asset/resource"
            }
            ...
        ]
        ...
    }
    ...
}

3. Import pandoc from wasm-pandoc like this:

import { pandoc } from "wasm-pandoc"

4. Execute it like this (it's async):

const output = await pandoc(
    '-s -f json -t markdown', // command line switches
    inputFileContents, // string for text formats or blob for binary formats
    [ // Additional files - for example bibliography or images
        {
            filename: 'image13.png',
            contents: ..., // string for text formats or blob for binary formats
        },
        ...
    ]
)

console.log(output)

{
  out: '...',
  mediaFiles: Map {'media': Map {'image1.jpg' => Blob, 'image2.png' => Blob, ...}}
}

out will either be a string (for text formats) or a Blob for binary formats of the main output. mediaFiles will be a map of all additional dirs/files that pandoc has created during the process.

Acknowledgements

Thanks to John MacFarlane and all the contributors who made pandoc possible: a fantastic tool that has benefited many developers and is a source of pride for the Haskell community!

Thanks to all efforts to make pandoc run with wasm, including but not limited to:

• amesgen Don't patch out network
• Cheng Shao pandoc-wasm
• George Stagg's pandoc-wasm
• Yuto Takahashi's wasm-pandoc
• TerrorJack's asterius pandoc demo