js-component-tools

JS Component Tools

JS-compiled CLI & API versions of some of wasm-tools, wit-bindgen host js and binaryen opt & wasm2asm.

Note: This is an experimental prototype without any maintenance guarantees.

Install

CLI

npm install -g js-component-tools

The CLI is then available via the jsct --help command.

Usage: jsct <command> [options]

WebAssembly Component Tools

Options:
  -V, --version                    output the version number
  -h, --help                       display help for command

Commands:
  wit [options] <component-path>   [wasm2wit] decode the world WIT for a WebAssembly Component
  host [options] <component-path>  [wit-bindgen host js] host a WebAssembly component for JavaScript execution
  opt [options] <component-file>   optimizes a Wasm component, including running wasm-opt Binaryen optimizations
  print [options] <input>          [wasm-tools print] prints the WebAssembly binary textual form
  parse [options] <input>          [wasm-tools parse] parses the Wasm text format
  help [command]                   display help for command

API

npm install js-component-tools

import { host } from 'js-component-tools';
import { readFile } from 'fs/promises';

const component = await readFile('./component.wasm');
const compiledFiles = await host(component, { optimize: true, minify: true });