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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the context is restored, WebGL resources such as textures and buffers that were created before the context was lost are no longer valid.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
Target objects HTMLCanvasElement
Interface WebGLContextEvent

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.

Inheritance

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

Specifications

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

Browser compatibility

  
Feature Chrome Edge Firefox (Gecko) Internet Explorer Opera Safari
Basic support 9 (Yes) 4.0 (2.0) 11 12 5.1
  
Feature Android Chrome for Android Edge Firefox Mobile (Gecko) IE Mobile Opera Mobile Safari Mobile
Basic support ? 25 (Yes) 4.0 (2.0) ? 12 8.0

See also

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 このページの貢献者: nmve, erikadoyle, fscholz, teoli
 最終更新者: nmve,