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TypeScript Tutorial

44 topics · Free · Certificate on completion

Learn TypeScript — add types to JavaScript and write safer code.

Your learning path

Build on JavaScript while learning how types describe possible values. Narrow unions, model object shapes, and understand where compile-time checks stop.

Put the lessons into practice

Describe a small function’s input and output types, then test invalid inputs at runtime. Avoid hiding a mismatch with a type assertion; improve the model instead.

What you'll learn

01.TypeScript Introduction 02.TypeScript Setup & Install 03.The TypeScript Compiler (tsc)04.The tsconfig.json File 05.TypeScript Basic Types 06.TypeScript Type Inference 07.TypeScript Arrays 08.TypeScript Tuples 09.TypeScript Enums 10.TypeScript any and unknown 11.TypeScript never and void 12.TypeScript Union Types 13.TypeScript Intersection Types 14.TypeScript Literal Types 15.TypeScript Type Aliases 16.TypeScript Interfaces 17.Interfaces vs Type Aliases 18.Optional and Readonly Properties 19.TypeScript Functions 20.TypeScript Function Overloads 21.TypeScript Generics 22.TypeScript Generic Constraints 23.TypeScript Classes 24.TypeScript Access Modifiers 25.TypeScript Abstract Classes 26.Classes Implementing Interfaces 27.TypeScript Modules 28.TypeScript Namespaces 29.TypeScript Utility Types Overview 30.Partial, Pick, and Omit 31.TypeScript Record Type 32.TypeScript Type Narrowing 33.TypeScript Type Guards 34.TypeScript keyof and typeof Operators 35.TypeScript Indexed Access Types 36.TypeScript Mapped Types 37.TypeScript Conditional Types 38.TypeScript Declaration Files 39.TypeScript Declaration Merging 40.TypeScript Decorators 41.TypeScript with Async/Await and Promises 42.TypeScript Error Handling 43.TypeScript with React 44.TypeScript Best Practices