WebGLRenderingContext.isContextLost()

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

Syntax

gl.isContextLost();

Return value

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

Examples

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

gl.linkProgram(program);

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

Specifications

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

Browser compatibility

Update compatibility data on GitHub
DesktopMobile
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
isContextLostChrome Full support 9Edge Full support 12Firefox Full support 4IE Full support 11Opera Full support 12Safari Full support 5.1WebView Android Full support YesChrome Android Full support 25Firefox Android Full support YesOpera Android Full support 12Safari iOS Full support 8Samsung Internet Android Full support Yes

Legend

Full support  
Full support

See also