How to reuse JavaScript class instances

Question

class Person {
  constructor(name, age) {
    this.name = name;
    this.age = age;
  }
 
  sayHello() {
    console.log(`Hello, my name is ${this.name} and I'm ${this.age} years old.`);
  }
}

I can create instances like person = new Person('Alice', 30);

But in my case I need to create many instances which will finish their work and be deleted but I want to reuse the instance after their work is finished. I know there is no API like this.resetInstance() but is there any way to achieve this?

Answer 1

Most of the time, it's not worth the effort. But if you want to do it, here is the code:

class Person {
  constructor(name, age) {
    this.name = name;
    this.age = age;
  }
 
  sayHello() {
    console.log(`你好，我叫${this.name}，我今年${this.age}岁。`);
  }

  set(name, age) {
    this.name = name;
    this.age = age;
  }

}
const person = new Person('A', 1000);
person.sayHello(); // 你好，我叫A，我今年1000岁。
person.set('B', 2000); 
person.sayHello(); // 你好，我叫B，我今年2000岁。