webglcontextlost

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.

Example

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

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

canvas.addEventListener('webglcontextlost', function(e) {
  console.log(e); 
}, false);

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

// "webglcontextlost" event is logged.

Inheritance

The webglcontextlost event implements the WebGLContextEvent interface, which inherits from Event. You can use the properties and methods defined on these interfaces.

Specifications

Browser compatibility

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See also

• WebGLContextEvent
• WebGLRenderingContext.isContextLost()
• WEBGL_lose_context, WEBGL_lose_context.loseContext(), WEBGL_lose_context.restoreContext()