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TypeScript Tutorial

Learn TypeScript From Scratch

Learn TypeScript from basics to practical typing patterns with clear explanations, examples, projects, FAQs, and a beginner-friendly roadmap.

15Topics
100+Examples
FreeAlways

About TypeScript

Learn TypeScript from basics to practical typing patterns with clear explanations, examples, projects, FAQs, and a beginner-friendly roadmap.

Prerequisites

Basic computer knowledge is enough to start. Prior programming experience is helpful but not required.

Audience

Designed for beginners, students, interview preparation, and developers who want a clear TypeScript path.

What You'll Learn

Core concepts, examples, common mistakes, practical patterns, FAQs, and a step-by-step learning roadmap.

Tools Needed

Use a modern browser, code editor, terminal, and the available online compiler when supported.

TypeScript Learning Path

Model application contracts with TypeScript, use narrowing and generics safely, configure strict projects, and verify runtime boundaries.

  • Modern JavaScript
  • npm and module basics
  1. Master annotations, inference, unions, objects, and functions
  2. Use narrowing, generics, modules, utility and advanced types
  3. Configure, test, publish, and migrate strict projects

Typed API Client Library

Build a strict client library with runtime response validation, discriminated errors, generic pagination, tests, and declaration output.

Milestones

  1. Model requests, responses, and failure unions
  2. Implement validated client and generic helpers
  3. Test types and runtime behavior, then build package output

Completion Evidence

  • Type tests
  • Runtime validation tests
  • Generated declarations

Typed API Client Library Readiness Check

Complete each criterion and retain the listed evidence before marking the course capstone ready for review.

0 of 6 criteria complete

Self-assessment

Complete every milestone and evidence item to pass this readiness gate.

Tutorial Topics

Follow the lessons in order, or jump straight into the topic you need.

1. Introduction
Lesson
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2. Setup
Lesson
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3. Basic Types
Lesson
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4. Variables
Lesson
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5. Functions
Lesson
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6. Arrays & Tuples
Lesson
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7. Objects & Interfaces
Lesson
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8. Union & Literal Types
Lesson
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9. Type Aliases
Lesson
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10. Classes
Lesson
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11. Generics
Lesson
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12. Narrowing
Lesson
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13. Modules
Lesson
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14. Utility Types
Lesson
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15. tsconfig.json
Lesson
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TypeScript Topic Hub

Use the full topic workspace when you want tutorials, practice, interview prep, and nearby topic links in one place.

Open TypeScript topic hub
Tutorials, practice, and prep together
Topic hub 4 surfaces Types and inference Interfaces
Study TypeScript syntax and types, test code quickly, and rehearse interview-style answers in one learning path.

TypeScript Benefits

  • Build a strong foundation with clear explanations and examples.
  • Practice concepts in a structured order instead of jumping randomly.
  • Prepare for interviews with common mistakes, FAQs, and practical notes.
  • Learn patterns that transfer to real projects and production work.
  • Use one complete learning path from basics to advanced topics.
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