https://github.com/mdn/watify

Compile WAT to WASM with WASM 🙇
https://github.com/mdn/watify

Last synced: 4 months ago
JSON representation

Compile WAT to WASM with WASM 🙇

• Host: GitHub
• URL: https://github.com/mdn/watify
• Owner: mdn
• License: mpl-2.0
• Created: 2025-02-26T11:57:24.000Z (about 1 year ago)
• Default Branch: main
• Last Pushed: 2025-05-26T12:04:05.000Z (12 months ago)
• Last Synced: 2025-06-01T12:56:16.188Z (12 months ago)
• Language: HTML
• Size: 481 KB
• Stars: 0
• Watchers: 5
• Forks: 0
• Open Issues: 2
• Metadata Files:
  • Readme: README.md
  • License: LICENSE
  • Code of conduct: CODE_OF_CONDUCT.md
  • Security: SECURITY.md

Awesome Lists containing this project

README

          
# Watify

Compile WAT to WASM with WASM 🙇

## Usage

For local testing, build the package, then server the project root

by running an http server. THe `index.html` file has this example.

The output can be seen in the browser's console.

```javascript

import init, { watify } from "watify";

const w = `

(module

  (func $fac (export "fac") (param $x i64) (result i64)

    (return_call $fac-aux (local.get $x) (i64.const 1))

  )

  (func $fac-aux (param $x i64) (param $r i64) (result i64)

    (if (result i64) (i64.eqz (local.get $x))

      (then (return (local.get $r)))

      (else

        (return_call $fac-aux

          (i64.sub (local.get $x) (i64.const 1))

          (i64.mul (local.get $x) (local.get $r))

        )

      )

    )

  )

)`;

init().then(() => {

  const wasm = watify(w);

  console.log(wasm);

  WebAssembly.instantiate(wasm, {}).then((result) => {

    const fac = result.instance.exports.fac;

    console.log(fac(5n));

  });

});

```