The Ultimate Guide to Proper Use of Animation in UX
A useful reference for all rules concerning animation of interfaces described clearly and practically.
The Complete Guide to Lazy Loading Images
All of the ins and outs of lazy loading images, a technique that helps improve the time it takes for a web page to load by deferring image loads until they are needed.
Test many foreground and background color combos for compliance with WCAG 2.0 minimum contrast.