Roadmap

• Intro to typescript
  • Introduction
  • 1 - What is typescript
  • 2 - Why Use TypeScript?
  • 3 - More Benefits
  • 4 - Review
• Setting up Typescript
  • Introduction
  • 1 - Installing Typescript
  • 2 - TsConfig
  • 3 - Review
• Basic Types
  • Introduction
  • 1 - Primitive Types
  • 2 - Exercise I
  • 3 - Arrays and Tuples
  • 4 - Enums
  • 5 - Objects
  • 6 - Functions
  • 7 - Exercise II
  • 8 - Exercise III
  • 9 - void, undefined & null
  • x10 - any, unknown & never
• Custom Types
  • Introduction
  • 1 - the 'type' Alias
  • 2 - Interface
  • 3 - Class
  • 4 - Exercise IV
  • 5 - Inheritance
  • 6 - Exercise V
• Type Assertions and Compatibility
  • Introduction
  • 1 - Type Assertions
  • 2 - Type Inference
  • 3 - Type Compatibility
  • 4 - Function Compatibility
  • 5 - Class Compatibility
  • 6 - Review
• Generics
  • Introduction
  • 1 - Generic Functions
  • 2 - Generic Interfaces
  • 3 - Generic Classes
  • 4 - Review
• DOM Manipulation in Typescript
  • Introduction
  • 1 - Selecting Elements
  • 2 - Manipulating Elements
  • 3 - Event Handling
  • 4 - Exercise VI - Form Validation
  • 5 - The DOM and TypeScript Generics
  • 6 - Modules
  • 7 - Asynchronous Programming
  • 8 - Exercise VII
• Narrowing & Type Guards
  • Introduction
  • 1 - The 'typeof' type guard
  • 2 - Truthiness narrowing
  • 3 - Equality narrowing
  • 4 - The 'in' type guard
  • 5 - The 'instanceof' type guard
• Type Predicates
  • Introduction
  • 1 - What are Type Predicates
  • 2 - Advantages of Type Predicates
  • 3 - Drawbacks of Type Predicates
  • 4 - Type predicates vs equality checks vs assertions.
• Beginner's Typescript Challenges
  • Introduction
  • 1 - Challenge 1 - OpenLibrary
  • 2 - Solution to Challenge 1

Introduction

js
// Examples
let isTrue: boolean = true;
let fullName: string = "John Doe";

ts
let fname: string;
fname = 42; // Error
Type 'number' is not assignable to type 'string'.2322Type 'number' is not assignable to type 'string'.