This is an experimental technology
Because this technology's specification has not stabilized, check the compatibility table for usage in various browsers. Also note that the syntax and behavior of an experimental technology is subject to change in future versions of browsers as the specification changes.
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.
| Feature | Chrome | Firefox | Edge | Internet Explorer | Opera | Safari |
|---|---|---|---|---|---|---|
| Basic Support | 56 | 51.0 | (No) | (No) | 43 | (No) |
| Feature | Android | Chrome for Android | Edge mobile | Firefox for Android | IE mobile | Opera Android | iOS Safari |
|---|---|---|---|---|---|---|---|
| Basic Support | (No) | (No) | (No) | (No) | (No) | (No) | (No) |