Quick Tip: TypeScript Generics Examples

Quick Tip

TypeScript generics examples:

// Generic function
function identity<T>(arg: T): T {
  return arg;
}

// Generic interface
interface Box<T> {
  value: T;
}

// Generic class
class Container<T> {
  private items: T[] = [];
  add(item: T): void { this.items.push(item); }
  getAll(): T[] { return this.items; }
}

// Generic constraint
function getProperty<T, K extends keyof T>(obj: T, key: K): T[K] {
  return obj[key];
}

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