Tutorial by Examples

Background TypeScript is a typed superset of JavaScript that compiles directly to JavaScript code. TypeScript files commonly use the .ts extension. Many IDEs support TypeScript without any other setup required, but TypeScript can also be compiled with the TypeScript Node.JS package from the command...

class Greeter { greeting: string; constructor(message: string) { this.greeting = message; } greet(): string { return this.greeting; } }; let greeter = new Greeter("Hello, world!"); console.log(greeter.greet()); Here we have a class, Gree...

TypeScript is a typed superset of JavaScript, which means that all JavaScript code is valid TypeScript code. TypeScript adds a lot of new features on top of that. TypeScript makes JavaScript more like a strongly-typed, object-oriented language akin to C# and Java. This means that TypeScript code te...

For use TypeScript REPL in Node.js you can use tsun package Install it globally with npm install -g tsun and run in your terminal or command prompt with tsun command Usage example: $ tsun TSUN : TypeScript Upgraded Node type in TypeScript expression to evaluate type :help for commands in r...

ts-node is an npm package which allows the user to run typescript files directly, without the need for precompilation using tsc. It also provides REPL. Install ts-node globally using npm install -g ts-node ts-node does not bundle typescript compiler, so you might need to install it. npm instal...