WEBGL_lose_context: restoreContext() method
Baseline
Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since April 2018.
The restoreContext() method of the WEBGL_lose_context extension is part of the WebGL API and allows you to simulate restoring the context of a WebGLRenderingContext.
It triggers the steps described in the WebGL specification for handling context restored. The context is not usable until the webglcontextrestored event is fired.
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);
});
gl.getExtension("WEBGL_lose_context").restoreContext();
Specifications
| Specification |
|---|
| WebGL WEBGL_lose_context Khronos Ratified Extension Specification |