WebGL2RenderingContext.waitSync()

This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

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

void gl.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.

Examples

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

Specifications

Specification	Status	Comment
WebGL 2.0 The definition of 'waitSync' in that specification.	Editor's Draft	Initial definition for WebGL.
OpenGL ES 3.0 The definition of 'glWaitSync' in that specification.	Standard	Man page of the (similar) OpenGL API.

Browser compatibility

Update compatibility data on GitHub

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
`waitSync`	Chrome Full support 56	Edge Full support 79	Firefox Full support 51	IE No support No	Opera Full support 43	Safari No support No	WebView Android Full support 58	Chrome Android Full support 58	Firefox Android Full support 51	Opera Android Full support 43	Safari iOS No support No	Samsung Internet Android Full support 7.0

Legend

Full support: Full support
No support: No support