What is the ideal method for releasing a WebAssembly library on the npm registry?

Is there a recommended approach to publishing a library utilizing a wasm binary on npm?

During my attempts, I've come across several challenges. My ideal scenario would involve:

  • A process that is completely transparent to the user. Users should be able to simply run npm install on the package and then 

    import {my_function} from my_package
    , without needing to worry about whether a wasm binary is involved or not.

  • Compatibility with all major asset bundlers. Regardless of whether the user employs webpack, rollup, parcel, or any other tool, no configuration should be necessary to bundle the wasm file, distribute it alongside other assets, and ensure access from within the library.

  • Efficiency. It would be preferable for the wasm file to not be inlined within a JavaScript file, allowing for parsing and compilation in a streaming manner. While this aspect is slightly less crucial than the previous ones, it would be advantageous to leverage the performance benefits offered by wasm.

javascriptnpmpackagewebassembly

Answer №1

Depending on the ecosystem and programming language you choose to work with, the process of porting Rust to WebAssembly can vary. One example is a project focused on this task called wasm-pack. Their documentation seems to address the aspect of being transparent to the user as mentioned in your first point.

They also offer bindings to interact with WebAssembly files through JavaScript instead of including them inline, potentially improving efficiency, which aligns with your second point. The workflow generated by wasm-pack only includes necessary npm files like package.json and build/dependency details. However, there might be challenges when integrating with asset bundlers if an application directly imports the WebAssembly file. Fortunately, plugins are available for all major bundlers. As for whether these plugins should be included within the library itself or utilized externally, further research may be needed to determine the best approach.

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