CONTENT-VISIBILITY: THE NEW CSS PROPERTY THAT BOOSTS YOUR RENDERING PERFORMANCE

Summary from the TLDR newsletter

The content-visibility property launching in Chromium 85 may be one of the most impactful new CSS properties for improving page load performance. It enables the user agent to skip an element's rendering work until it is needed. It also allows for faster interactions with on-screen content. Reducing rendering work can in some situations reduce a page's Interaction to Next Paint, a metric that evaluates a page's ability to be reliably responsive to user input.