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.
InheritanceEdit
This interface inherits properties and methods from its parent interface, Event.
<div id="interfaceDiagram" style="display: inline-block; position: relative; width: 100%; padding-bottom: 11.666666666666666%; vertical-align: middle; overflow: hidden;"><svg style="display: inline-block; position: absolute; top: 0; left: 0;" viewbox="-50 0 600 70" preserveAspectRatio="xMinYMin meet"><a xlink:href="https://developer.mozilla.org/en-US/docs/Web/API/Event" target="_top"><rect x="1" y="1" width="75" height="50" fill="#fff" stroke="#D4DDE4" stroke-width="2px" /><text x="38.5" y="30" font-size="12px" font-family="Consolas,Monaco,Andale Mono,monospace" fill="#4D4E53" text-anchor="middle" alignment-baseline="middle">Event</text></a><polyline points="76,25 86,20 86,30 76,25" stroke="#D4DDE4" fill="none"/><line x1="86" y1="25" x2="116" y2="25" stroke="#D4DDE4"/><a xlink:href="https://developer.mozilla.org/en-US/docs/Web/API/WebGLContextEvent" target="_top"><rect x="116" y="1" width="170" height="50" fill="#F4F7F8" stroke="#D4DDE4" stroke-width="2px" /><text x="201" y="30" font-size="12px" font-family="Consolas,Monaco,Andale Mono,monospace" fill="#4D4E53" text-anchor="middle" alignment-baseline="middle">WebGLContextEvent</text></a></svg></div>a:hover text { fill: #0095DD; pointer-events: all;}PropertiesEdit
This interface inherits properties from its parent interface, Event.
WebGLContextEvent.statusMessage- A read-only property containing additional information about the event.
MethodsEdit
This interface doesn't define any own methods, but inherits methods from its parent interface, Event.
ExamplesEdit
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.SpecificationsEdit
| Specification | Status | Comment |
|---|---|---|
| WebGL 1.0 The definition of 'WebGLContextEvent' in that specification. |
Recommendation | Initial definition. |