如何基于类型字符串在javascript中创建新对象？

function Person(name, age) {
  this.name = name;
  this.age = age;
}

var person = new Person("John", 25);
console.log(person); // 输出：{ name: "John", age: 25 }

var person = {
  name: "John",
  age: 25
};

console.log(person); // 输出：{ name: "John", age: 25 }

var person = Object.create(null);
person.name = "John";
person.age = 25;

console.log(person); // 输出：{ name: "John", age: 25 }

function createPerson(name, age) {
  return {
    name: name,
    age: age
  };
}

var person = createPerson("John", 25);
console.log(person); // 输出：{ name: "John", age: 25 }