web api event
HTMLCanvasElement: webglcontextrestored event
The webglcontextrestored event of the WebGL API is fired if the user agent restores the drawing buffer for a WebGLRenderingContext object.
Once the context is restored, WebGL resources such as textures and buffers that were created before the context was lost are no longer valid. You need to reinitialize the state of your WebGL application and recreate resources.
This event does not bubble.
Syntax
Use the event name in methods like addEventListener(), or set an event handler property.
addEventListener("webglcontextrestored", (event) => { })
onwebglcontextrestored = (event) => { }
Event type
A WebGLContextEvent. Inherits from Event.
Example
With the help of the WEBGL_lose_context extension, 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();
// "webglcontextrestored" event is logged.
Specifications
SpecificationsStandards references are available on the canonical MDN page.
Browser compatibility
Browser compatibilityCompatibility data is available on the canonical MDN page.