TypeScript

ELI5 — The Vibe Check

TypeScript is JavaScript with a strict parent watching over it. You have to tell it exactly what type each thing is — a number, a string, an object — and it yells at you BEFORE you ship if you mix them up. Less bugs, more typing (the keyboard kind).

Real Talk

TypeScript is a statically-typed superset of JavaScript developed by Microsoft. It adds optional type annotations, interfaces, enums, and generics that are checked at compile time. TypeScript compiles down to plain JavaScript and catches entire classes of bugs before runtime.

Show Me The Code

interface User {
  name: string;
  age: number;
}

function greet(user: User): string {
  return `Hello, ${user.name}!`;
}

When You'll Hear This

"Switch the project to TypeScript so we catch type errors at compile time." / "The TypeScript compiler is screaming at me about a null check."