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WebGL2RenderingContext.getSyncParameter

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

The WebGL2RenderingContext.getSyncParameter() method of the WebGL 2 API returns parameter information of a WebGLSync object.

any gl.getSyncParameter(sync, pname);

sync

A WebGLSync object.

pname

A GLenum specifying which information to return. Possible values:

gl.OBJECT_TYPE: Returns a GLenum indicating the type of the sync object (always gl.SYNC_FENCE).
gl.SYNC_STATUS: Returns a GLenum indicating the status of the sync object (gl.SIGNALED or gl.UNSIGNALED).
gl.SYNC_CONDITION: Returns a GLenum indicating the sync objects' condition (always gl.SYNC_GPU_COMMANDS_COMPLETE).
gl.SYNC_FLAGS: Returns a GLenum indicating the flags with which the sync object was created (always 0 as no flags are supported).

Depends on the pname parameter, either a GLenum or a GLbitfield.

var sync = gl.fenceSync(gl.SYNC_GPU_COMMANDS_COMPLETE, 0);
gl.getSyncParameter(sync, gl.SYNC_STATUS);

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

	Desktop
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari
Basic support	56	No	51	No	43	No

	Mobile
	Android webview	Chrome for Android	Edge Mobile	Firefox for Android	Opera for Android	iOS Safari	Samsung Internet
Basic support	58	58	No	51	43	No	7.0