This article covers CSS-related techniques for optimizing Web Vitals.

Learn the most common speed issues caused by CSS and how to avoid them.

Painting an unstyled page, and then repainting it once styles are parsed would be bad user experience. For this reason, CSS is render blocking, unless the browser knows the CSS is not currently needed. The browser can paint the page once it has downloaded the CSS and built the CSS object model. Browsers follow a specific rendering path: paint only occurs after layout, which occurs after the render tree is created, with requires both the DOM and the CSSOM trees. To optimize the CSSOM construction, remove unnecessary styles, minify, compress and cache it, and split CSS not required at page lo...

Learn how to hasten page rendering by cutting the excess from your site's CSS.