- Static resource sizing: External resources such as images, videos, and ads must specify their sizes statically. This means that AMP can calculate the position of all elements and page layout before anything is downloaded.
- CSS inlining and limitations: CSS must be inlined in the head of the AMP page and is limited to 50 KB per page. Some CSS is restricted, including the * selector, the not selector, the filter property, and the !important declaration. Only GPU-accelerated CSS animations and transitions ...
Get AMP: Building Accelerated Mobile Pages now with O’Reilly online learning.
O’Reilly members experience live online training, plus books, videos, and digital content from 200+ publishers.