Shifts of offscreen elements that are countered with scroll anchoring, and combined with a natural user scroll, are now correctly ignored.
For mouse drag and resize actions, we buffer the layout shift for Mousemove events after Mousedown event. When the Mouseup is received, We set hadRecentInput to be true, which triggers the exclusion window to ignore the layout shift score during mouse dragging and resizing.
Sites should see a decrease in their Cumulative Layout Shift scores when shifts of offscreen elements happens for scroll anchoring.
Desktop sites which make use of mouse drag and resize will now receive an input exclusion on these user interactions, resulting in lower CLS scores.
Chrome 93 is currently expected to be released the week of August 31, 2021.
