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WEBGL_lose_context

The WEBGL_lose_context extension is part of the WebGL API and exposes functions to simulate losing and restoring a WebGLRenderingContext.

WebGL extensions are available using the WebGLRenderingContext.getExtension() method. For more information, see also Using Extensions in the WebGL tutorial.

Note: This extension is available to both, WebGL1 and WebGL2 contexts.

Methods

WEBGL_lose_context.loseContext()

Simulates losing the context.

WEBGL_lose_context.restoreContext()

Simulates restoring the context.

Examples

With this extension, you can simulate the webglcontextlost and webglcontextrestored events:

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

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

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

// WebGLContextEvent event with type "webglcontextlost" 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
WEBGL_lose_context
26
18
17
22
19-58
No
15
15
8
≤37
≤37
26
18
22
19-58
14
14
8
1.5
1.0
loseContext
26
17
22
19-58
No
15
8
≤37
26
22
19-58
14
8
1.5
restoreContext
26
17
22
19-58
No
15
8
≤37
26
22
19-58
14
8
1.5

See also

© 2005–2021 MDN contributors.
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/API/WEBGL_lose_context