SOURCE

function myNew(func,...args){
    const obj = Object.create(func.prototype)
    const result = func.apply(obj,args)
    return typeof result === 'object'?result:obj
}
function Person(name, age) {
  this.name = name;
  this.age = age;
}

// 使用 myNew 模拟 new 操作符
const person1 = myNew(Person, 'Alice', 30);
const person2 = myNew(Person, 'Bob', 25);

console.log(person1); // 输出: Person { name: 'Alice', age: 30 }
console.log(person2); // 输出: Person { name: 'Bob', age: 25 }