CSS overflow-anchor (Scroll Anchoring)
Changes in DOM elements above the visible region of a scrolling box can result in the page moving while the user is in the middle of consuming the content. By default, the value of `overflow-anchor` is `auto`, it can mitigate this jarring user experience by keeping track of the position of an anchor node and adjusting the scroll offset accordingly
When used on an anchor, this attribute signifies that the browser should send a ping request the resource the attribute points to.
htmlanchorelement api: ping