HTMLCanvasElement: contextrestored event
Limited availability
This feature is not Baseline because it does not work in some of the most widely-used browsers.
The contextrestored event of the Canvas API is fired if the user agent restores the backing storage for a CanvasRenderingContext2D.
You can redraw, re-retrieve resources, and reinitialize the state of your context after receiving this event.
Syntax
Use the event name in methods like addEventListener(), or set an event handler property.
js
addEventListener("contextrestored", (event) => {});
oncontextrestored = (event) => {};
Event type
A generic Event.
Example
The code fragment below detects the context restored event.
js
const canvas = document.getElementById("canvas");
canvas.addEventListener(
"contextrestored",
(e) => {
console.log(e);
// call to redrawCanvas() or similar
},
false,
);
Specifications
| Specification |
|---|
| HTML # event-contextrestored |