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requestIdleCallback()

Limited availability

The requestIdleCallback() API queues a function that runs in idle browser time, either at the end of a frame or when the user is inactive. Also known as the background tasks API.

Browser support (view on caniuse.com)

  • Chrome 47 Released on 2015-12-01
  • Chrome Android 47 Released on 2015-12-02
  • Edge 79 Released on 2020-01-15
  • Firefox 55 Released on 2017-08-08
  • Firefox for Android 55 Released on 2017-08-08
  • Safari Not supported
  • Safari on iOS Not supported

Baseline availability blocked since January 2020 by Safari (78 months)

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MDN documentation

Specifications

Usage (according to Chrome Platform Status)

~51.765% of page loads. More data at chromestatus.com.

Web Platform Tests (WPT)

View the latest WPT test results for this feature

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