TypeScript for Beginners

Learn to code with TypeScript, the language behind modern web apps. Ten-minute lessons, a streak to keep, and real code you write, check and run in every lesson, right on your phone.

by Teyro

20 lessons
1 unit
4h 6m
Up to 290 XP

I wrote this one myself. Start now and I'll count your streak from lesson one.

What you'll learn

Write, check and run real TypeScript from your first lesson
Describe your data with types so mistakes are caught before the code runs
Calculate with numbers and avoid the NaN trap
Join, clean and format text with template strings
Make decisions with if, else and literal unions
Read error messages calmly and fix your own bugs

Course path

1 unit · 20 lessons

The spreadsheet that broke11 min · InteractiveFree+10 XP
Ten days in May12 min · InteractiveFree+10 XP
Why TypeScript exists12 min · InteractiveFree+10 XP
Your first line: console.log()12 min · InteractiveFree+10 XP
Checkpoint: Femi's quiz12 min · InteractiveFree+20 XP
Text needs quotes12 min · InteractiveFree+10 XP
Your first type error13 min · InteractiveFree+10 XP
Types are erased12 min · InteractiveFree+10 XP
Errors are normal13 min · InteractiveFree+10 XP
Checkpoint: the stand-up13 min · InteractiveFree+20 XP
TypeScript as a calculator13 min · InteractiveFree+10 XP
Comments: notes for humans12 min · InteractiveFree+10 XP
Where TypeScript runs11 min · InteractiveFree+10 XP
Read code before you write it12 min · InteractiveFree+10 XP
Checkpoint: Jayden's challenge13 min · InteractiveFree+20 XP
Think like a programmer12 min · InteractiveFree+10 XP
Learning to code with AI, honestly12 min · InteractiveFree+10 XP
Grace's plan for the Session Booker12 min · InteractiveFree+10 XP
The most common beginner mistakes12 min · InteractiveFree+10 XP
Chapter Challenge: Session Booker v0.015 min · InteractiveFree+20 XP
Unit 1 chestFinish every lesson in this unit+50 XP

Teyro Original · Start free

All courses

Coding · Beginner