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

See also

• The WebGLContextEvent signals changes in the context state.