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

Specification
WebGL Specification
# 5.15.2

Browser compatibility

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See also