Detect Passive Events

Detects if the browser supports passive event listeners. Tree-shakable and side-effect free. Also available as part of [detect-it][detectitrepo].

[Live detection test][livedetectiontest]

  !npm type definitions

> Note that the code used in the detection is adapted from this [Passive Events Explainer][passiveexplainer].

$3

``
npm install --save detect-passive-events
`

`js
// supportsPassiveEvents is a boolean
import { supportsPassiveEvents } from 'detect-passive-events';

if (supportsPassiveEvents) {
// passive events are supported by the browser
document.addEventListener('scroll', handleScroll, { capture: false, passive: true });
} else {
// passive events are not supported by the browser
document.addEventListener('scroll', handleScroll, false);
}
`

$3

Optionally, instead using npm install you can the load the script directly in the browser. A minified UMD version is available from Unpkg for this purpose.

`html

`

`js
// it will be available on the window as DetectPassiveEvents
if (window.DetectPassiveEvents.supportsPassiveEvents) {
document.addEventListener('scroll', handleScroll, { capture: false, passive: true });
} else {
document.addEventListener('scroll', handleScroll, false);
}
``

[livedetectiontest]: https://detect-it.rafgraph.dev
[passiveexplainer]: https://github.com/WICG/EventListenerOptions/blob/gh-pages/explainer.md
[detectitrepo]: https://github.com/rafgraph/detect-it