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.

Availability: 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

Specification Status Comment
WEBGL_lose_context
The definition of 'WEBGL_lose_context' in that specification.
Recommendation Initial definition.

Browser compatibility

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See also