I am in the whitelist camp. But reading this thread sparked a thought: could browsers handle server side handling (e.g. submit buttons) in the way React and al

I am in the whitelist camp. But reading this thread sparked a thought: could browsers handle server side handling (e.g. submit buttons) in the way React and alike frameworks work: instead of rebuilding the page from scratch diff the current DOM and the DOM for the new page and apply the diff in a smooth transition with animations?