Utility Types Development Tutorials, Guides & Insights

• Use Generics for Reusability: Generics are great for creating reusable components and functions that work with different types.
• Constrain Generics When Necessary: Use extends to limit the types that a generic can accept, ensuring type safety.
• Leverage Advanced Types for Complex Structures: Use advanced types like intersection, union, and mapped types to handle complex data structures and transformations.
• Utilize Utility Types: TypeScript’s utility types can simplify type transformations, making your code cleaner and more maintainable.

TypeScript’s generics and advanced types provide powerful tools for building flexible, type-safe, and maintainable code. By mastering these features, you can write more robust TypeScript applications that can handle a variety of data structures and use cases. This cheatsheet serves as a quick reference to help you implement these concepts in your projects, making your TypeScript code more powerful and versatile.

function printId(id: number | string) {
  console.log('ID:', id);
}

printId(101);
printId('ABC123');

type Direction = 'up' | 'down' | 'left' | 'right';

function move(direction: Direction) {
  console.log('Moving', direction);
}

move('up'); // valid
move('right'); // valid
// move('forward'); // error