WebGL2RenderingContext: getSyncParameter() 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.

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

getSyncParameter(sync, 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.

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

Specification
WebGL 2.0 Specification # 3.7.14

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