How do I use interfaces in TypeScript?

How do I use interfaces in TypeScript?

In TypeScript, interfaces are used to define the structure of an object. You can specify properties and their types.

Can you give me an example of an interface?

Sure! Here's a simple example:

interface User {
  name: string;
  age: number;
}

This defines a User interface with a name and age.

How do I implement this interface in a class?

You can implement an interface in a class like this:

class Person implements User {
  name: string;
  age: number;

  constructor(name: string, age: number) {
    this.name = name;
    this.age = age;
  }
}

What if I want to make some properties optional?

You can make properties optional by adding a question mark ? after the property name:

interface User {
  name: string;
  age?: number;
}