OffscreenCanvasRenderingContext2D: commit() method

Note: This feature is available inWeb Workers.

Deprecated: This feature is no longer recommended. Though some browsers might still support it, it may have already been removed from the relevant web standards, may be in the process of being dropped, or may only be kept for compatibility purposes. Avoid using it, and update existing code if possible; see thecompatibility table at the bottom of this page to guide your decision. Be aware that this feature may cease to work at any time.

Non-standard: This feature is not standardized. We do not recommend using non-standard features in production, as they have limited browser support, and may change or be removed. However, they can be a suitable alternative in specific cases where no standard option exists.

TheOffscreenCanvasRenderingContext2D.commit()method of theCanvas 2D API was intended to copy the rendering context's bitmap to the bitmap of the placeholder<canvas> element of the associatedOffscreenCanvas object.The copy operation is synchronous. Calling this method is not needed for the transfer, since it happens automatically during the event-loop execution.

Syntax

commit()

const placeholder = document.createElement("canvas");const offscreen = placeholder.transferControlToOffscreen();const ctx = offscreenCanvas.getContext("2d");// Perform some drawing using the 2d contextctx.fillStyle = "blue";ctx.fillRect(0, 0, 10, 10);// Push placeholder to the canvas elementctx.commit();