Self-paced · ~15 minutes · no coding needed

Understand TypeScript, visually.

A six-lesson micro-course that builds from zero — we don’t even assume you know JavaScript. Clear visuals, plain-language explanations, and a quick challenge to make it stick.

Start lesson 1 →Your progress saves automatically.

What you’ll cover

Six short lessons, then a mixed-round challenge.

1What JavaScript isA computer is fast but completely literal. Code is how we tell it what to do — and JavaScript is the language that makes web pages actually do things.2Why mistakes slip throughJavaScript is wonderfully flexible about the values it holds — and that flexibility is exactly how bugs sneak in.3What a “type” isThe simplest idea in the course: a “type” is just the kind of a value.4What TypeScript addsTypeScript is JavaScript plus type labels that get checked as you write — so mix-ups get caught in your editor, not by your users.5From TypeScript to JavaScriptBrowsers only understand JavaScript — so TypeScript gets translated into plain JavaScript before it runs.6Why it's worth itA bit more to write up front buys you four things that compound as a project grows.★Final Challenge11 questions across 5 rounds, with a scorecard at the end.