CSS

2.9 Use a design system for interface consistency

User Experience Design

2.12 Ensure animation is proportionate and easy to control

User Experience Design

2.13 Use optimized and appropriate web typography

User Experience Design

3.2 Remove unnecessary or redundant information

Web Development

3.3 Modularize bandwidth-heavy components

Web Development

3.4 Remove unnecessary code

Web Development

3.5 Avoid redundancy and duplication in code

Web Development

3.8 Defer the loading of non-critical resources

Web Development

3.12 Use sustainability beneficial user preference media queries

Web Development

3.13 Ensure layouts work for different devices and requirements

Web Development