如何在Typescript中插入类型和对象引用

let myNumber: number = 10;

function add(a: number, b: number): number {
  return a + b;
}

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

let person: Person = {
  name: "John",
  age: 20,
};

type Point = {
  x: number;
  y: number;
};

let point: Point = {
  x: 10,
  y: 20,
};

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

let result = identity<number>(10); // 使用泛型指定为number类型

class MyClass {
  name: string;
}

let obj: MyClass = new MyClass();