Generics in TypeScript Explained
Generics allow you to create reusable, strongly-typed functions and types.
Simple Example
function identity<T>(arg: T): T {
return arg;
}
const a = identity<number>(5); // a: number
const b = identity<string>('hello'); // b: string
Generic on a Type
type ApiResponse<T> = {
data: T;
status: number;
}
const userResponse: ApiResponse<{id: number; name: string}> = {
data: {id: 1, name: 'Alice'},
status: 200
};
Conclusion
Using generics lets you reuse code while keeping strong type safety!