TypeScript Explorers

Philosophy

The Basics

  • Naming Lies.

  • You have been using TypeScript all along!

    • Type Inference in JS

  • 3 Primitives

  • Variable types & Inference

  • Function return types

  • Arrays vs Tuples

  • Any, Unknown, Never, Void

  • Null, Undefined

  • Inline object typing (with fixed keys and with any keys -- Index Types and Index Signatures)

  • Shaping the data model with Interface and Type

  • Optionals

  • Type Casting: As and As Unknown

  • Enums vs String Enums

  • Union and Intersection Types

  • String Unions

  • Type Narrowing and Widening

  • Strict Mode: Why union undefined

  • Generic Types

  • Using Generics

  • Common TS Helper Types (Generics) & How to read generics -- Record, Partial, Readonly, Omit, Pick, Exclude, etc.

  • Readonly in Interface

Advanced Types & Creating Helper Types

  • Type Guards and Type Predicates Using if, in, typeof and predicate function to narrow down types

  • Type Aliasing and Recursive Types: ITreeNode and ILinkedList

  • Creating Your Own Custom Types

  • Mapped Types

  • Conditional Types

  • Advanced Types in Production

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