WEBGL_lose_context extension

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since April 2018.

TheWEBGL_lose_context extension is part of theWebGL API and exposes functions to simulate losing and restoring aWebGLRenderingContext.

WebGL extensions are available using theWebGLRenderingContext.getExtension() method. For more information, see alsoUsing Extensions in theWebGL tutorial.

Note:This extension is available to both,WebGL1 andWebGL2 contexts.

Instance methods

WEBGL_lose_context.loseContext(): Simulates losing the context.
WEBGL_lose_context.restoreContext(): Simulates restoring the context.

Examples

With this extension, you can simulate thewebglcontextlost andwebglcontextrestored 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.