CHAPTER 1
TypeScript Language Features
What if we could strengthen JavaScript with the things that are missing for large scale application development, like static typing, classes [and] modules . . . that’s what TypeScript is about.
—Anders Hejlsberg
TypeScript is a superset of JavaScript. That means that the TypeScript language includes the entire JavaScript language plus a collection of useful additional features. This is in contrast to the various subsets of JavaScript and the various lint tools that seek to reduce the available features to create a smaller language with fewer surprises. This chapter will introduce you to the extra language ...
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