TypeScript is JavaScript with syntax for types. TypeScript is a strongly typed programming language that builds on JavaScript, giving you better tooling at any scale.

TypeScript offers full support for the class keyword introduced in ES2015. As with other JavaScript language features, TypeScript adds type annotations and other syntax to allow you …

The goal of TypeScript is to be a static typechecker for JavaScript programs - in other words, a tool that runs before your code runs (static) and ensures that the types of the program are …

In TypeScript, we can specify a function that can be called in different ways by writing overload signatures. To do this, write some number of function signatures (usually two or more), …

TypeScript Documentation Get Started Quick introductions based on your background or preference. TS for the New Programmer TypeScript for JS Programmers TS for Java/C# …

TypeScript’s type system allows you to build new types out of existing ones using a large variety of operators. Now that we know how to write a few types, it’s time to start combining them in …

TypeScript includes declaration files for all of the standardized built-in APIs available in JavaScript runtimes. This includes things like methods and properties of built-in types like string or …

TypeScript provides another construct called intersection types that is mainly used to combine existing object types. An intersection type is defined using the & operator.

It describes how the type system of TypeScript differs from Haskell’s type system. It also describes unique features of TypeScript’s type system that arise from its modelling of …

TypeScript has the ability to rewrite code from newer versions of ECMAScript to older ones such as ECMAScript 3 or ECMAScript 5 (a.k.a. ES5). This process of moving from a newer or …