Create a subclass that can be modified without affecting the super class.

• What is this?
• When should I use this?
• Install
• Use
• API
  • unherit(Super)
• Types
• Compatibility
• Contribute
• Security
• License

This is a tiny package lets you create a subclass, that can be modified, without affecting the super class.

Not often! You might have some weird cases though.

This package is ESM only. In Node.js (version 14.14+, 16.0+), install with npm:

npm install unherit

In Deno with esm.sh:

import {unherit} from 'https://esm.sh/unherit@3'

In browsers with esm.sh:

<script type="module">
  import {unherit} from 'https://esm.sh/unherit@3?bundle'
</script>

import {EventEmitter} from 'node:events'
import {unherit} from 'unherit'

// Create a private class which acts just like `EventEmitter`.
const Emitter = unherit(EventEmitter)

Emitter.prototype.defaultMaxListeners = 0
// Now, all instances of `Emitter` have `0` maximum listeners, without affecting
// other `EventEmitter`s.

new Emitter().defaultMaxListeners === 0 // => true
new EventEmitter().defaultMaxListeners === undefined // => true
new Emitter() instanceof EventEmitter // => true

This package exports the identifier unherit. There is no default export.

Subclass Super.

This package is fully typed with TypeScript. It exports no additional types.

This package is at least compatible with all maintained versions of Node.js. As of now, that is Node.js 14.14+ and 16.0+. It also works in Deno and modern browsers.

Yes please! See How to Contribute to Open Source.

This package is safe.

MIT © Titus Wormer