This is an experimental technology
Check the Browser compatibility table carefully before using this in production.
The WebGL2RenderingContext.fenceSync() method of the WebGL 2 API creates a new WebGLSync object and inserts it into the GL command stream.
Syntax
WebGLSync gl.fenceSync(condition, flags);
Parameters
condition- A
GLenumspecifying the condition that must be met to set the sync object's state to signaled. Must begl.SYNC_GPU_COMMANDS_COMPLETE. - flags
- A
GLbitfieldspecifying a bitwise combination of flags controlling the behavior of the sync object. Must be0(exists for extensions only).
Return value
A WebGLSync object.
Examples
gl must be a WebGL2RenderingContext. WebGLSync objects are not available in WebGL 1.
var sync = gl.fenceSync(gl.SYNC_GPU_COMMANDS_COMPLETE, 0);
Specifications
| Specification | Status | Comment |
|---|---|---|
| WebGL 2.0 The definition of 'fenceSync' in that specification. |
Editor's Draft | Initial definition for WebGL. |
| OpenGL ES 3.0 The definition of 'glFenceSync' in that specification. |
Standard | Man page of the (similar) OpenGL API. |
Browser compatibility
The compatibility table in this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.
Update compatibility data on GitHub
| Desktop | Mobile | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
fenceSync | Chrome Full support 56 | Edge No support No | 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