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.
waitSync(sync, flags, timeout)syncA WebGLSync object on which to wait on.
flagsA GLbitfield specifying a bitwise combination of flags controlling the flushing behavior. Must be 0 (exists for extensions only).
timeoutA GLint64 specifying a timeout the server should wait before continuing. Must be gl.TIMEOUT_IGNORED.
None (undefined).
const sync = gl.fenceSync(gl.SYNC_GPU_COMMANDS_COMPLETE, 0);
gl.waitSync(sync, 0, gl.TIMEOUT_IGNORED);