Web platform features explorer - willReadFrequently

The optional willReadFrequently parameter of a canvas's getContext() method permits the browser to optimize for frequent getImageData() calls by avoiding hardware acceleration. Also known as multiple readback.

Status

Baseline Newly Available (since 2024-09-16)

This feature is expected to reach Baseline Widely Available status on: 2027-03-16

MDN documentation

HTMLCanvasElement: getContext() method

Specifications

HTML (#concept-canvas-will-read-frequently), from HTML Workstream (WHATWG).

Browser support

Chrome 99 Released on 2022-03-01
Chrome Android 99 Released on 2022-03-01
Edge 99 Released on 2022-03-03
Firefox 28 Released on 2014-03-18
Firefox for Android 28 Released on 2014-03-18
Safari 18 Released on 2024-09-16
Safari on iOS 18 Released on 2024-09-16

Usage (according to Chrome Platform Status)

~4.593% of page loads. More data at chromestatus.

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