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Key Features of TypeScript

There are many features and functionality available in typescript.

  • Type Annotations
  • Interfaces and Type aliases
  • Enums
  • Generics
  • Advanced Type System

Type Annotations​

We can specify types for variables, function parameters, and return values.

types.ts
function greet(name: string): string {
  return `Hello, ${name}`;
}
console.log(greet("Alice"));

Interfaces and Type aliases​

TypeScript supports interfaces and type aliases for defining the structure of objects.

interface-and-type-alias.ts
interface User {
  name: string;
  age: number;
}

const user: User = { name: "John", age: 25 };
console.log(user);

Enums​

Enums allow us to define a set of named constants.

enums.ts
interface User {
  name: string;
  age: number;
}

const user: User = { name: "John", age: 25 };
console.log(user);

Generics​

Generics enable type-safe and reusable components.

Advanced Type System​

TypeScript supports advanced types like union types, intersection types, and mapped types.

typescript Copy code

type-system.ts
type Result = string | number; // Union Type
const score: Result = 85;

How to Get Started with TypeScript​

Before using a programming language we need a complete setup of that language, If we have already installed a NodeJS, then we able to use typesript, else first install NodeJS then install typescript via npm or yarn

Install TypeScript​

shell-script.sh
npm install -g typescript

Compile TypeScript​

Compile TypeScript Save your TypeScript code in a file with the .ts extension. Compile it to JavaScript using the tsc command:

bash-script.sh
tsc filename.ts

Summary​

TypeScript is a powerful extension of JavaScript that brings structure, type safety, and modern development features to the table.

Referances​