In this section of the chapter, we will begin to explore some of the older third-party JavaScript libraries, their declaration files, and how to write compatible TypeScript for each of these frameworks. We will compare Backbone, Angular (version 1), and Ext JS, which are all frameworks for building rich client-side JavaScript applications. During our discussion, we will see that some frameworks are highly compliant with the TypeScript language and its features, some are partially compliant, and some have very low compliance.
In the next chapter, we will explore some third-party JavaScript libraries that have been written explicitly with TypeScript in mind, or for which the TypeScript compiler has been modified to work with. In the remainder of this chapter, however, we'll focus on standard third-party libraries that were designed to support JavaScript...