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WebGLRenderingContext.getError

The WebGLRenderingContext.getError() method of the WebGL API returns error information.

GLenum gl.getError();

None.

Constant	Description
`gl.NO_ERROR`	No error has been recorded. The value of this constant is 0.
`gl.INVALID_ENUM`	An unacceptable value has been specified for an enumerated argument. The command is ignored and the error flag is set.
`gl.INVALID_VALUE`	A numeric argument is out of range. The command is ignored and the error flag is set.
`gl.INVALID_OPERATION`	The specified command is not allowed for the current state. The command is ignored and the error flag is set.
`gl.INVALID_FRAMEBUFFER_OPERATION`	The currently bound framebuffer is not framebuffer complete when trying to render to or to read from it.
`gl.OUT_OF_MEMORY`	Not enough memory is left to execute the command.
`gl.CONTEXT_LOST_WEBGL`	If the WebGL context is lost, this error is returned on the first call to `getError`. Afterwards and until the context has been restored, it returns `gl.NO_ERROR`.

gl.getError(); // gl.NO_ERROR (0)

gl.enable(gl.FOOBAR);
gl.getError(); // gl.INVALID_ENUM;

Specification	Status	Comment
WebGL 1.0 The definition of 'getError' in that specification.	Recommendation	Initial definition.
OpenGL ES 2.0 The definition of 'glGetError' in that specification.	Standard	Man page of the OpenGL API.

	Desktop
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari
Basic support	9	12	4	11	12	5.1

	Mobile
	Android webview	Chrome for Android	Edge Mobile	Firefox for Android	Opera for Android	iOS Safari	Samsung Internet
Basic support	Yes	25	Yes	Yes	12	8.1	Yes