WebGL2RenderingContext: waitSync() method

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since September 2021.

See full compatibility

Note: This feature is available in Web Workers.

The WebGL2RenderingContext.waitSync() method of the WebGL 2 API returns immediately, but waits on the GL server until the given WebGLSync object is signaled.

The method is a no-op in the absence of the possibility of synchronizing between multiple GL contexts.

Syntax

waitSync(sync, flags, timeout)

Parameters

sync: A WebGLSync object on which to wait on.
flags: A GLbitfield specifying a bitwise combination of flags controlling the flushing behavior. Must be 0 (exists for extensions only).
timeout: A GLint64 specifying a timeout the server should wait before continuing. Must be gl.TIMEOUT_IGNORED.

Return value

None (undefined).

Examples

const sync = gl.fenceSync(gl.SYNC_GPU_COMMANDS_COMPLETE, 0);
gl.waitSync(sync, 0, gl.TIMEOUT_IGNORED);

Specifications

Specification
WebGL 2.0 Specification # 3.7.14

Browser compatibility

	desktop					mobile
	Chrome	Edge	Firefox	Opera	Safari	Chrome Android	Firefox for Android	Opera Android	Safari on iOS	Samsung Internet	WebView Android	WebView on iOS
`waitSync`	Chrome – Full support Chrome 56 (Release date: 2017-01-25) footnote Full support	Edge – Full support Edge 79 (Release date: 2020-01-15) footnote Full support	Firefox – Full support Firefox 51 (Release date: 2017-01-24) footnote Full support	Opera – Full support Opera 43 (Release date: 2017-02-07) footnote Full support	Safari – Full support Safari 15 (Release date: 2021-09-20) footnote Full support	Chrome Android – Full support Chrome Android 58 (Release date: 2017-04-25) footnote Full support	Firefox for Android – Full support Firefox for Android 51 (Release date: 2017-01-24) footnote Full support	Opera Android – Full support Opera Android 43 (Release date: 2017-09-27) footnote Full support	Safari on iOS – Full support Safari on iOS 15 (Release date: 2021-09-20) footnote Full support	Samsung Internet – Full support Samsung Internet 7 (Release date: 2018-03-16) footnote Full support	WebView Android – Full support WebView Android 58 (Release date: 2017-04-25) footnote Full support	WebView on iOS – Full support WebView on iOS 15 (Release date: 2021-09-20) footnote Full support

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Full support: Full support