WEBGL_lose_context: restoreContext() method

The WEBGL_lose_context.restoreContext() method is part of the WebGL API and allows you to simulate restoring the context of a WebGLRenderingContext object.

Syntax

restoreContext()

Parameters

None.

Return value

None (undefined).

Exceptions

Browsers may not report WebGL errors by default. WebGL's error reporting works by calling getError() and checking for errors. The following exceptions may be thrown:

INVALID_OPERATION

Thrown if the context was not lost.

Examples

With this method, you can simulate the webglcontextrestored event:

const canvas = document.getElementById("canvas");
const gl = canvas.getContext("webgl");

canvas.addEventListener(
  "webglcontextrestored",
  (e) => {
    console.log(e);
  },
  false,
);

gl.getExtension("WEBGL_lose_context").restoreContext();

Specifications

Browser compatibility

See also

• WebGLRenderingContext.isContextLost()
• Events: webglcontextlost, webglcontextrestored, webglcontextcreationerror