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);


A WebGLSync object.
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).

Return value

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.

Browser compatibility

FeatureChromeEdgeFirefoxInternet ExplorerOperaSafari
Basic support56 No51 No43 No
FeatureAndroid webviewChrome for AndroidEdge mobileFirefox for AndroidOpera AndroidiOS SafariSamsung Internet
Basic support5858 No5143 No7.0

See also

Document Tags and Contributors

Contributors to this page: fscholz, teoli
Last updated by: fscholz,