Animation modifying the left and top of an element will change its shape and may cause other elements on the page to move and change shape, a process called layout. CSS-based animation and natively supported Web animation are usually handled on a thread called a synthesizer thread, where both transforms and opacity can be processed; unlike the browser's main thread, it executes styles, layout, drawing, and JavaScript in that main thread. This means that if the browser runs some time-consuming task on the main thread, the animation can continue to run without interruption; if any animation starts drawing, layout, or both, the main thread will do the job. This is the same for CSS-based or JavaScript-based animation, layout or drawing costs are huge, making it meaningless for the associated CSS or JavaScript to perform work or render; avoid using attribute animation that triggers layout or drawing. For most modern browsers, this means limiting animation (modified properties) to opacity and transform
so: when you modify left and top, transform:translate (x, y) and left:xpx;top:ypx are different in performance, and there may be differences in effect https://codeshelper.com/a/11...

transform has higher performance, and
left,top has better compatibility