This is the unpublished documentation of wasm-pack, the published documentation is available on the main Rust and WebAssembly documentation site . Features documented here may not be available in released versions of wasm-pack.

Package Code for npm

We've made our code so now we need to package it all up. In your project directory run the following command:

$ wasm-pack build --scope MYSCOPE

where MYSCOPE is your npm username. Normally you could just type wasm-pack build but since other people are doing this tutorial as well we don't want conflicts with the wasm-add package name! This command when run does a few things:

  1. It'll compile your code to wasm if you haven't already
  2. It'll generate a pkg folder with the wasm file, a JS wrapper file around the wasm, your README, and a package.json file.

This is everything you need to upload your code to npm! Let's do just that!

First off you'll need to login to npm with the account you made earlier if you didn't already have one:

$ wasm-pack login

Next you'll need to go into the pkg directory and actually upload the package:

$ cd pkg
$ npm publish --access=public

Now normally if things are not scoped you can just do npm publish but if you give it a scope you'll need to tell npm that this is actually public so it can publish it. We need to do that here since we gave our packages a scope to avoid conflicting with each other! Next up is actually running the code and verifying we got it from npm and how we can use that code.