Installation

Package Managers

pnpm

pnpm add untiljs

npm

npm install untiljs

yarn

yarn add untiljs

CDN

You can also use UntilJS directly via CDN:

<script src="https://unpkg.com/untiljs@latest/dist/index.iife.min.js"></script>
<script>
  let value = 0
  setTimeout(() => { value = 5 }, 1000)

  until(() => value)
    .toBe(5)
    .then(() => {
      console.log('Value is 5!')
    })
</script>

Requirements

• Node.js >= 16 (for Node.js usage)
• Modern browser with ES6+ support

TypeScript

UntilJS is written in TypeScript and provides full type definitions out of the box. No additional @types package is needed.

import until, { WatchSource, UntilToMatchOptions } from 'untiljs'

// Types are automatically inferred
const result = await until(() => someValue).toBe(5)

Verifying Installation

import until from 'untiljs'

console.log(typeof until) // 'function'