TypeScript2

TypeScript: JavaScript with Superpowers

TypeScript is a programming language that builds on top of JavaScript, adding a powerful feature: types. It’s designed to improve code quality, maintainability, and developer productivity by catching potential errors early on during development.

Key Features:

• Static Typing: You explicitly declare the types of variables and function parameters, ensuring code consistency and preventing runtime errors.
• Type Inference: TypeScript often infers types automatically, saving you time and effort.
• Classes and Interfaces: Organize code with robust object-oriented constructs.
• Type Annotations: Add descriptive information to improve code readability and maintainability.
• Type Checking: Compiler flags potential type mismatches and errors before runtime.
• Transpiles to JavaScript: TypeScript code converts to plain JavaScript, running seamlessly in any JavaScript environment.

Code Examples:

1. Variable Types:

TypeScript

let greeting: string = “Hello, TypeScript!”; let age: number = 30; let isAdmin: boolean = true;

2. Function Types:

function add(x: number, y: number): number {
  return x + y;
}

3. Classes and Interfaces:

TypeScript
interface Person {
  name: string;
  age: number;
}

class Employee implements Person

{
  name: string;
  age: number;
  jobTitle: string;

  constructor(name: string, age: number, jobTitle: string) {
    this.name = name;
    this.age = age;
    this.jobTitle = jobTitle;
  }
}

4. Type Annotations:

const myArray: number[] = [1, 2, 3];
const myObj: { name: string, age: number } = { name: "Alice", age: 25 };

Benefits of TypeScript:

• Improved Code Quality: Reduced errors and bugs, leading to more reliable applications.
• Better Tooling: Enhanced code completion, refactoring, and navigation in editors and IDEs.
• Improved Maintainability: Clearer code structure and type information for easier understanding and modification.
• Large-Scale Application Development: Particularly well-suited for complex projects with multiple developers.

Visual Representation of Type Checking:

Exploring TypeScript Further:

• Official TypeScript Website: https://www.typescriptlang.org/
• TypeScript Playground: https://www.typescriptlang.org/play
• TypeScript Tutorials: https://www.typescriptlang.org/docs/handbook/typescript-in-5-minutes.html

Sources

1. https://github.com/1bella2bella3bella/FE21-Sayuri-Isabella

2. https://github.com/FIT2095/content

Generated by Bard with propmt: can you tell me what typescript is with code examples

editRegenerate draftrefreshvolume_up