Study Vault

TypeScript has become an essential tool for modern JavaScript development. Let's explore some advanced concepts.

Type Safety Benefits

TypeScript provides compile-time type checking, which helps catch errors before they reach production:

interface User {
  id: number;
  name: string;
  email: string;
}
 
function getUser(id: number): User {
  // Type-safe implementation
  return {
    id,
    name: "John Doe",
    email: "john@example.com"
  };
}

Advanced Types

Union Types

type Status = "pending" | "approved" | "rejected";
 
function handleStatus(status: Status) {
  // Type-safe status handling
}

Generics

Generics allow you to write reusable, type-safe code:

function identity<T>(arg: T): T {
  return arg;
}
 
const result = identity<string>("Hello");

Best Practices

Use strict mode in tsconfig.json
Leverage type inference when possible
Create reusable types and interfaces
Use discriminated unions for state management
Avoid using any - use unknown instead

TypeScript's type system is powerful and helps build more maintainable applications.