TypeScript tutorialLesson 2Free preview

TS Introduction

This lesson is part of TypeScript · All levels

Summary

TypeScript is a JavaScript superset that adds optional static type and development aids. TypeScript code is compiled into JavaScript so that it remains running in the same environment as JavaScript. This approach makes teams more confident when changing code because many type errors are caught early.

Key points

JavaScript superset: all JS code is valid in TypeScript
Type is optional but checked by the compiler
Compilation produces JavaScript that is ready to execute

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