any-signal

Combines an array of AbortSignals into a single signal that is aborted when any signal is

Table of contents

• Install
  • Browser <script> tag
• Usage
• API
  • anySignal(signals)
    • Parameters
    • Returns
  • ClearableSignal.clear()
• Acknowledgements
• API Docs
• License
• Contribution

Install

$ npm i any-signal

Browser <script> tag

Loading this module through a script tag will make it's exports available as AnySignal in the global namespace.

<script src="https://unpkg.com/any-signal/dist/index.min.js"></script>

Usage

import { anySignal } from 'any-signal'

const userController = new AbortController()
const timeoutController = new AbortController()

const combinedSignal = anySignal([userController.signal, timeoutController.signal])
combinedSignal.addEventListener('abort', () => console.log('Abort!'))

// Abort after 1 second
const timeoutId = setTimeout(() => timeoutController.abort(), 1000)

// The user or the timeout can now abort the action
await performSomeAction({ signal: combinedSignal })
clearTimeout(timeoutId)

// Clear will clean up internal event handlers
combinedSignal.clear()

API

anySignal(signals)

Parameters

| Name | Type | Description | | ------- | ------------------------------------------------------------------------------------ | ------------------------------------------------------------------- | | signals | Array<AbortSignal> | The Signals that will be observed and mapped to the returned Signal |

Returns

| Type | Description | | --------------------------------------------------------------------------------- | --------------------------------------------------------------------------------------------------------------------------------------------- | | ClearableSignal | A Signal that will be aborted as soon as any one of its parent signals are aborted. Extends AbortSignal with the clear function for cleanup |

The returned ClearableSignal will only be aborted once, and as soon as one of its parent signals is aborted.

ClearableSignal.clear()

Removes all internal event handlers. This must be called after abort has been called, or the signals have successfully executed, otherwise there is a risk of leaking event handlers.

Acknowledgements

The anySignal function is taken from a comment by jakearchibald

API Docs

• https://jacobheun.github.io/any-signal

License

Licensed under either of

• Apache 2.0, (LICENSE-APACHE / http://www.apache.org/licenses/LICENSE-2.0)
• MIT (LICENSE-MIT / http://opensource.org/licenses/MIT)

Contribution

Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.