Learning Design Patterns Book by Lydian Hallie & Addy Osmani Free online book about modern design patterns in JavaScript and commonly used libraries/frameworks such as React & Vue JS. The app focuses on the practical usage of patterns and modern development techniques to build robust, performant, and maintainable apps. The book focuses on the commonly used design, rendering, and performance patterns. Debugging Make sure to have the workspace open to this file directory in VSCode. Run npm run dev to start the app. Click F5 to start debugging.