What Is TypeScript

What

TypeScript is both a programming language and a tool (the TypeScript compiler, tsc). It is designed to extend JavaScript by adding static types.

How

Because browsers cannot run TypeScript directly, tsc converts (transpiles) TypeScript code into standard JavaScript. If the compiler encounters a type violation, it will report an error and prevent successful compilation.

Why

The primary goal is to make JavaScript development more predictable. By requiring a compilation step, TypeScript forces you to resolve structural issues in your code early, leading to more stable and performant software.

Summary

TypeScript acts as a powerful “super-linter” that ensures your code follows a strict set of rules before it is ever allowed to run.