HTMLCanvasElement: contextrestored event

Baseline: Not widely supported

Baseline is determined by this web feature being supported on the current and the previous major versions of major browsers.

Experimental: This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

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 Standard
# event-contextrestored

Browser compatibility

BCD tables only load in the browser

See also