JavaScript Framework Design (2nd Edition)

This is the second edition of JavaScript Framework Design, written by front-end developer Zhong Qincheng (online name Situ Zhengmei), which systematically dissects the internal structure of mainstream JavaScript frameworks along the thread of "what modules are needed to build a framework from scratch." The book has 16 chapters: it first covers the seed module (modularity, object extension, array conversion, type detection, domReady, no-conflict handling) and the language module (extensions and fixes for strings, arrays, numbers, functions, and dates), then moves on to browser sniffing and feature detection, the class factory, the selector engine, the node module, the data cache module, the style module, and the attribute module, followed by separate discussions of the event systems for PC and mobile, the asynchronous model (including the evolution of async solutions such as Promise), the data interaction module, and the animation engine. The latter half turns to the two major themes of modern frameworks: MVVM and componentization, explaining front-end static templates, MVVM dynamic templates, the performance wall and the complexity wall, and comparing the component approaches of the jQuery era, avalon2, and React. The second edition rewrites the language module content in response to the language changes brought by ES6/ES7, and adds new practices in mobile events, asynchronous programming, and componentization; its depth clearly exceeds ordinary "API usage" books, focusing on explaining design trade-offs and implementation principles.