> Layout change occurs when elements are added or removed from DOM or when they change their size Layout change happens even as you as much as glance at a web

> Layout change occurs when elements are added or removed from DOM or when they change their size Layout change happens even as you as much as glance at a web page. See e.g. https://csstriggers.com https://csstriggers.com Also things like getting the size or offset of an element would cause a layout recalculation (I don't know if it's still the case).