TypeScript Course

Learn the fundamentals of TypeScript, including its syntax, features, and how to leverage its benefits in your JavaScript projects. Whether you are a beginner or an experienced JavaScript developer, this course will provide you with a solid foundation in TypeScript. 🚀

Fundamentals

The TypeScript Handbook is a comprehensive guide that covers various aspects of TypeScript. It is a great resource for your daily TypeScript work. The handbook covers the following topics:

The Basics 📚

Everyday Types 🌈

Narrowing 🎯

More on Functions 🔄

Object Types 🧱

• noImplicitAny: Disable implicit variable type assignment with any = unknown. TypeScript will never infer types of arrays. any is mostly used with strings.
• enums: Enums can be defined with string or number values. Enums default to 0.
• definitely typed: Refers to a project that involves a central repository of definitions for npm packages which do not have types, specified in tsconfig.json.
• overriding: When a class extends another class and replaces the members of its parent, it is called overriding.
• implicit: firstName = "John";
• explicit: firstName: string = "John";
• disabled type checking: let myVar: any;
• unknown: let myVar: unknown;
• no array changes: const names: readonly string[] = ["Dylan"];
• loosely typed: Refers to vanilla JavaScript.
• tuple: let ourTuple: [number, boolean, string]; - an array of mixed types.

Type Manipulation 🔧

Creating Types from Types 🧩

Generics 📦

Keyof Type Operator 🔑

Typeof Type Operator 📝

Indexed Access Types 🎯

Conditional Types ❓

Mapped Types 🗺️

Template Literal Types ✨

Classes 🏫

Modules 📦

Reference

The reference section provides deep dive materials and reference guides for TypeScript:

Utility Types 🛠️

Cheat Sheets 📄

Decorators 🎨

Declaration Merging 🔄

Enums 🌐

Iterators and Generators 🔄

JSX 🌐

Mixins 🧁

Namespaces 🌐

Symbols 🔍

Triple-Slash Directives 🌐

Type Compatibility 🔄

Type Inference 🔄

Variable Declaration 🔄

Modules Reference 📦

Tutorials

Learn how to use TypeScript in various environments and frameworks:

DOM Manipulation with TypeScript 🌐

Migrating from JavaScript to TypeScript 🔄

Using Babel with TypeScript 🌐

Declaration Files

Declaration files are important for describing existing JavaScript libraries and frameworks. Learn how to write declaration files and contribute to DefinitelyTyped:

Introduction to Declaration Files 📄

Declaration Reference 📄

Library Structures 📚

Templates for .d.ts Files 📄

Module Declarations 📦

Plugin Declarations 📦

Class Declarations 🏫

Function Declarations 🔄

Global Declarations 🌐

Modifying Existing Modules 📦

Do's and Don'ts ❌

Publishing Declaration Files 📄

Consuming Declaration Files 📄

JavaScript

Discover how to leverage TypeScript-powered JavaScript tooling:

JavaScript Projects Utilizing TypeScript 🌐

Type Checking JavaScript Files 🔄

Creating .d.ts Files from .js Files 📄

Project Configuration 📦

Compiler Configuration

Learn about the tsconfig.json file and how to configure the TypeScript compiler:

What is a tsconfig.json ❓

Compiler Options in MSBuild 🛠️

TSConfig Reference 📄

tsc CLI Options ⚙️

Project References 📦

Integrating with Build Tools 🛠️

Configuring Watch ⏱️

Nightly Builds 🌙

Cheat Sheets

Downloadable syntax reference pages for different parts of everyday TypeScript code:

Control Flow Analysis 🔄

Classes 🏫

Interfaces 🧩

Types 📦

For more detailed information, you can download PDFs and PNGs of the cheat sheets.

We hope you find this documentation helpful in your TypeScript journey. Happy coding! 😄