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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.
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a:hover text { fill: #0095DD; pointer-events: all;}
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.