Learn TypeScript in 1 Hour

TypeScript is a powerful, statically-typed superset of JavaScript that helps you write safer and more maintainable code.

We just posted a course on the freeCodeCamp.org YouTube channel that will help you master the essentials of TypeScript. In just one hour, you’ll learn everything from basic types and annotations to advanced features like generics and interfaces. The course walks through practical examples, helping you understand how TypeScript can make your code more robust, maintainable, and error-free.

Each section is structured to build your knowledge step by step, so you can follow along and code in real time. By the end, you’ll have a solid foundation in TypeScript and the confidence to use it in your own projects. Muhammad Omar Al Najjar created this course.

Here are the sections in the course:

• Intro & What Is TypeScript?

• Why Should You Learn TypeScript?

• How TypeScript Works

• Prerequisite

• Setup

• Create Your First Application

• Running the Code

• Configuration

• Built-In Types

• Type Annotations

• Dynamic Type Determination

• Any Type

• Type Annotations With Objects

• Type Annotations With Function

• Optional and Default Parameters

• Function Rest Parameter

• Arrow Function

• Anonymous Function

• Void & Never

• Union Types

• Literal Types

• Nullable Types

• Type Alias

• Intersection Type

• Type Annotations With Arrays

• Type Annotations With Multidimensional Arrays

• Tuple

• Enums

• Interface

• Interface Method and Parameters

• Reopening Interfaces and Use Cases

• Built-in Interface

• HTMLImageElement

• Interface vs. Type Aliases

• Class Type Annotations

• Class Access Modifiers

• Class Accessors

• Class Static Members

• Class Implement Interface

• Abstract Classes and Members

• Polymorphism & Method Override

• Class vs Interface

• Generics

• Generics Multiple Types

• Generics Classes

• Generics and Interfaces

• Type Assertions

• Debugging

• Outro & What's Next

Watch the full course on the freeCodeCamp.org YouTube channel (1-hour watch).