Pure Ts Tour May 2026

// Custom type guard interface Cat meow(): void;

// Generic constraint function getLength<T extends length: number >(item: T): number return item.length; pure ts tour

console.log(greet("Bob")); console.log(add(5, 3)); console.log(sumAll(1, 2, 3, 4)); src/features/4-interfaces.ts // Custom type guard interface Cat meow(): void;

// Explicit typing let username: string = "Alice"; let age: number = 30; let isActive: boolean = true; // Type inference (hover to see TS inferred type) let city = "Paris"; // string let score = 99.5; // number // Generic constraint function getLength&lt

function processValue(value: string | number): string if (typeof value === "string") return value.toUpperCase(); return value.toFixed(2);

Create folder structure: