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The WebGLRenderingContext.isContextLost() method returns a Boolean indicating whether or not the WebGL context has been lost.



Return value

A Boolean. True if the context is lost, false otherwise.


For example, when checking for program linking success, you could also check if the context is not lost:


if (!gl.getProgramParameter(program, gl.LINK_STATUS) && !gl.isContextLost()) {
  var info = gl.getProgramInfoLog(program);
  console.log("Error linking program:\n" + info);


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

Browser compatibility

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari
Basic support 9 4.0 (2.0) 11 12 5.1
Feature Android Chrome for Android Firefox Mobile (Gecko) IE Mobile Opera Mobile Safari Mobile
Basic support (Yes) 25 4.0 (2.0) (Yes) 12 8.1

See also

Document Tags and Contributors

 Contributors to this page: fscholz
 Last updated by: fscholz,