Mastering TypeScript

TypeScript has become the industry standard for large-scale JavaScript applications. In this post, we'll explore some advanced features that can help you write safer and more maintainable code.

1. Utility Types

TypeScript comes with several built-in utility types that can save you a lot of time.

Partial<T>

Constructs a type with all properties of Type set to optional.

interface Todo {
  title: string;
  description: string;
}

function updateTodo(todo: Todo, fieldsToUpdate: Partial<Todo>) {
  return { ...todo, ...fieldsToUpdate };
}

2. Generics

Generics allow you to create reusable components that work with a variety of types rather than a single one.

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

Conclusion

Mastering these concepts will take your TypeScript skills to the next level.