TypeScript has become the default language for serious web development
We'll start from zero, explain every concept with real examples, and by the end you'll know enough to use TypeScript in your own projects.
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Why TypeScript in 2026?
JavaScript is flexible - sometimes too flexible. You can pass a string where a number is expected, call a function that doesn't exist, or access a property that was never defined. JavaScript won't co
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Setting Up TypeScript
You need Node.js installed first. Then install TypeScript globally:
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Core Types in TypeScript
// Alternative syntax
let ids: Array = [1, 2, 3];
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Interfaces and Type Aliases
When you reuse the same object shape, define an interface:
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Functions in TypeScript
// Arrow function
const multiply = (a: number, b: number): number => a b;
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Generics - Write Reusable Code
Generics let you write functions that work with any type while keeping type safety:
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Enums
function checkAccess(role: Role): boolean {
return role === Role.Admin;
}
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Learn TypeScript from scratch in 2026. Types, interfaces, generics, and project setup explained for beginners with real