Could you clarify the meaning and application of a compositing layer in CSS?

Question

Anonymous · Accepted Answer

A compositing layer is a separate rendering layer created by the browser for
certain elements, allowing them to be independently painted and combined using
the GPU during the compositing stage. This improves performance by avoiding full
page repaints when those elements change, especially for animations involving
transform and opacity.

Anonymous · Answer

compositing layer is the layer where browser keep some objects of their own to
stop rerendering after the final paint. for example css like transitions,
will-change, something which tell browser that the paint has to change, so just
to avoid it, it keeps te compositing layer ready with the required objects

Anonymous · Answer

The role of a compositing layer is optimize a DOM element into GPU render,
allowing them to be updated, rendered and move without triggering repaint the
entire page.

Could you clarify the meaning and application of a compositing layer in CSS?

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