TypeScript

From JavaScript foundations to reliable browser applications.

60 lessons · 5 projects · open now

Four steps, one path

Each step includes everything before it, and your progress carries over. Start free; choose what the later steps are worth to you.

1. 1Free

   Introduction

   Check, run, and repair a first TypeScript program. 4 cumulative lessons.

   • Check and emit TypeScript with pinned compiler settings.
   • Complete compiler and real-browser checks using supplied fixtures.
   Start for free
2. 2Pay what you want

   Foundations

   Build a typed Issue Triage Board. 28 cumulative lessons.

   • Build and test typed browser interactions.
   • Complete compiler and real-browser checks using supplied fixtures.
   See this step
3. 3Pay what you want

   Complete Course

   Build a Resource Explorer with validated HTTP data and persistence. 48 cumulative lessons.

   • Handle runtime data and storage failures.
   • Complete compiler and real-browser checks using supplied fixtures.
   See this step
4. 4Pay what you want

   Extended Practice

   Migrate, repair, and extend unfamiliar applications. 60 cumulative lessons.

   • Coordinate requests and preserve behavior.
   • Complete compiler and real-browser checks using supplied fixtures.
   See this step