TypeScript · Full Course

TypeScript
Academy

Learn TypeScript from zero to advanced. Build safer, smarter JavaScript with confidence.

17 Lessons

4 Levels

∞ Free

Foundations

Lessons 1–6

What is TypeScript?

Introduction to TypeScript, why it exists, how to install it, and your first .ts file. The compilation pipeline explained.

intro setup tsc

Primitive Types

string, number, boolean, bigint, symbol, null, and undefined. The fundamental building blocks of TypeScript.

string number boolean

Arrays & Tuples

Typed arrays with Type[] and Array<T> syntax. Fixed-length tuples for structured data. Common array methods.

arrays tuples methods

Objects & Interfaces

Typing objects inline and with reusable interfaces. Optional properties, readonly fields, and method signatures.

objects interface readonly

Parameter types, return types, optional and default parameters, rest parameters, and arrow functions.

functions params void

Union Types & Type Aliases

The | operator for flexible types. Reusable type aliases. Literal types to restrict values to exact strings or numbers.

union type alias literal

Intermediate

Lessons 7–11

OOP in TypeScript. Access modifiers, shorthand constructors, inheritance, abstract classes, getters & setters.

class extends abstract

Write reusable type-safe code with <T>. Generic functions, interfaces, and constraints with extends.

generics <T> constraints

Named constants with numeric and string enums. Const enums for performance. Real-world usage patterns.

enum const enum string

Type Narrowing NEW

typeof, instanceof, and in operator guards. Type assertions with as. Safely working with union types at runtime.

typeof instanceof as

ES Modules in TypeScript. Named and default exports/imports. Exporting types. Recommended project folder structure.

export import modules

Advanced

Lessons 12–14

TypeScript's built-in type helpers: Partial, Required, Pick, Omit, Record, Exclude, Extract, NonNullable, ReturnType.

Partial Pick Omit Record

Class, method, property and parameter decorators. Real-world usage in NestJS and Angular. Decorator factories.

@decorator NestJS metadata

Compiler options deep dive: target, strict, paths, module, outDir, sourceMap. Ready-made configs for Node and React.

strict target paths

Real World

Lessons 15–17

TypeScript + React

Typing props, useState, useRef, useEffect, custom hooks, event handlers. Modern function components with full type safety.

React hooks props events

TypeScript + Node.js

Build type-safe APIs with Express. Typed request bodies, route params, middleware. NestJS introduction and comparison.

Express NestJS API

Conditional types, mapped types, template literal types, the infer keyword, intersection types, and discriminated unions.

conditional mapped infer