Building Polyfills: Web Platform APIs for the Present and Future (2014)
Part I. Building Polyfills
Chapter 1. The Current State of Web Polyfills
Chapter 2. Principles and Practices of Polyfill Development
Chapter 3. Building Your First Polyfill, Part 1: Getting Started
Chapter 4. Building Your First Polyfill, Part 2: Build Workflows and Cross-Browser Testing
Chapter 5. Building Your First Polyfill, Part 3: Performance and Edge-Case Testing
Part II. Prollyfilling and the Future of the Web Platform
Chapter 6. The Future of Polyfilling
Chapter 7. Building Your First Prollyfill