HTMLCanvasElement: webglcontextrestored event

The webglcontextrestored event of the WebGL API is fired if the user agent restores the drawing buffer for a WebGLRenderingContext object.

Once the context is restored, WebGL resources such as textures and buffers that were created before the context was lost are no longer valid. You need to reinitialize the state of your WebGL application and recreate resources.

Bubbles Yes
Cancelable Yes
Interface WebGLContextEvent
Event handler property none

Example

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

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

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

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

// "webglcontextrestored" event is logged.

Specifications

Specification Status Comment
WebGL 1.0
The definition of 'webglcontextrestored' in that specification.
Recommendation Initial definition.

Browser compatibility

BCD tables only load in the browser

See also