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WebGLContextEvent

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The WebContextEvent interface is part of the WebGL API and is an interface for an event that is generated in response to a status change to the WebGL rendering context.

Inheritance

This interface inherits properties and methods from its parent interface, Event.

Properties

This interface inherits properties from its parent interface, Event.

WebGLContextEvent.statusMessage
A read-only property containing additional information about the event.

Methods

This interface doesn't define any own methods, but inherits methods from its parent interface, Event.

Examples

With the help of the WEBGL_lose_context extension, you can simulate the webglcontextlost and webglcontextrestored events:

var canvas = document.getElementById("canvas");
var gl = canvas.getContext("webgl");

canvas.addEventListener("webglcontextlost", function(e) {
  console.log(e); 
}, false);

gl.getExtension('WEBGL_lose_context').loseContext();

// WebGLContextEvent event with type "webglcontextlost" is logged.

Specifications

Specification Status Comment
WebGL 1.0
The definition of 'WebGLContextEvent' in that specification.
Recommendation Initial definition.

Browser compatibility

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari
Basic support 9 49 (49) 11 12 5.1
Available in workers No support 49 (49) [1] No support No support No support
Feature Android Chrome for Android Firefox Mobile (Gecko) IE Mobile Opera Mobile Safari Mobile
Basic support ? 25 49.0 (49) ? 12 8.1
Available in workers No support No support 49.0 (49) [1] No support No support No support

[1] This feature is behind a feature preference setting. In about:config, set gfx.offscreencanvas.enabled to true.

See also

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