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.
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:
in this example,
gl must be a
WebGLQuery objects are not available in WebGL 1.
var query = gl.createQuery();
The definition of 'WebGLQuery' in that specification.
|Editor's Draft||Initial definition.|
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.
|Basic Support||No support1||No support||51.0||No support||No support||No support||No support|
|Feature||Android||Chrome for Android||Edge Mobile||Firefox for Android||IE Mobile||Opera Mobile||Safari Mobile|
|Basic Support||No support||No support||No support||No support||No support||No support||No support|
1. To use an experimental implementation of WebGL 2 in Chrome, you have to start Chrome with the runtime flag --enable-unsafe-es3-apis.