Table of Contents Switcher Home Table of Contents Chapter 1: CSS Chapter 2: JavaScript Chapter 3: Markup Chapter 4: Structured Data Chapter 5: Fonts Chapter 6: Media Chapter 7: WebAssembly Chapter 8: Third Parties Chapter 9: Interoperability Chapter 10: SEO Chapter 11: Accessibility Chapter 12: Performance Chapter 13: Privacy Chapter 14: Security Chapter 15: Mobile Web Chapter 16: Capabilities Chapter 17: PWA Chapter 18: CMS Chapter 20: Jamstack Chapter 21: Sustainability Chapter 22: Page Weight Chapter 26: HTTP Methodology Contributors Search