The contextlost event for <canvas> fires when the canvas backing storage is lost, while the contextrestored event fires when it is recreated.

Compatibility

• Chrome 99 Released on 2022-03-01
• Chrome Android 99 Released on 2022-03-01
• Edge 99 Released on 2022-03-03
• Firefox 125 Released on 2024-04-16
• Firefox for Android 125 Released on 2024-04-16
• Safari ❌ Search for bugs Search for standards position
• Safari on iOS ❌ Search for bugs Search for standards position

BCD data

• api.HTMLCanvasElement.contextlost_event
• api.HTMLCanvasElement.contextrestored_event
• api.CanvasRenderingContext2D.isContextLost
• api.OffscreenCanvas.contextlost_event
• api.OffscreenCanvas.contextrestored_event
• api.OffscreenCanvasRenderingContext2D.isContextLost