This is an experimental technology
Check the Browser compatibility table carefully before using this in production.
The WebGLQuery interface is part of the WebGL 2 API and provides ways to asynchronously query for information. By default, occlusion queries and primitive queries are available.
Another kind of queries are disjoint timer queries, which allow you to measure performance and profiling of your GPU. Disjoint timer queries are available with the EXT_disjoint_timer_query extension only.
When working with WebGLQuery objects, the following methods of the WebGL2RenderingContext are useful:
WebGL2RenderingContext.createQuery()WebGL2RenderingContext.deleteQuery()WebGL2RenderingContext.isQuery()WebGL2RenderingContext.beginQuery()WebGL2RenderingContext.endQuery()WebGL2RenderingContext.getQuery()WebGL2RenderingContext.getQueryParameter()
Examples
Creating a WebGLQuery object
in this example, gl must be a WebGL2RenderingContext. WebGLQuery objects are not available in WebGL 1.
var query = gl.createQuery();
Specifications
| Specification | Status | Comment |
|---|---|---|
| WebGL 2.0 The definition of 'WebGLQuery' in that specification. |
Editor's Draft | Initial definition. |
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.
| Desktop | Mobile | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
WebGLQuery | Chrome Full support 56 | Edge Full support 79 | 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