tangshuang / quickjs-eval

Run javascript in quickjs in browsers

QuickJS eval

Run javascript in a quickjs wasm in browser.

Inspired by https://github.com/maple3142/wasm-jseval (only works in nodejs)

Usage

npm i quickjs-eval

<script src="https://unpkg.com/quickjs-eval/dist/index.js"></script>
<script>
  const { getInstance } = quickjsEval
</script>

import { getInstace, eval, newFunction, fn } from 'quickjs-eval'

getInstance().then(({ eval, newFunction }) => {
  const total = eval('1 + 2 + 3')
  console.log(total)

  const fn = newFunction(['a', 'b'], 'return a + b')
  const sum = fn(1, 2)
  console.log(sum)
})

eval('1 + 2 + 3').then(res => console.log(res))

newFunction(['a', 'b'], 'return a + b').then(fn => fn(1, 2)).then(res => console.log(res))

fn(`function (a, b) { return a + b }`)(1, 2).then(res => console.log(res))

const func = fn(`function (a, b) { return a + b }`)
func(1, 2).then(res => console.log(res))

Development

You should first activate Emscripten and make sure emcc work.