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HTMLCanvasElement: webglcontextlost event

The webglcontextlost event of the WebGL API is fired if the user agent detects that the drawing buffer associated with a WebGLRenderingContext object has been lost.

Bubbles No
Cancelable Yes
Interface WebGLContextEvent
Event handler property none

Example

With the help of the WEBGL_lose_context extension, you can simulate the webglcontextlost event:

const canvas = document.getElementById('canvas');
const gl = canvas.getContext('webgl');

canvas.addEventListener('webglcontextlost', (event) => {
  console.log(event);
});

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

// "webglcontextlost" event is logged.

Specifications

Browser compatibility

Desktop Mobile
Chrome Edge Firefox Internet Explorer Opera Safari WebView Android Chrome Android Firefox for Android Opera Android Safari on IOS Samsung Internet
webglcontextlost_event
9
12
4
11
12
5.1
≤37
25
4
12
8
1.5

See also

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Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/API/HTMLCanvasElement/webglcontextlost_event