js使用对象的方法有哪些

const person = {
  firstName: "John",
  lastName: "Doe",
  fullName: function() {
    return this.firstName + " " + this.lastName;
  }
};

console.log(person.fullName()); // 输出: John Doe

function Person(firstName, lastName) {
  this.firstName = firstName;
  this.lastName = lastName;
}

Person.sayHello = function() {
  console.log("Hello!");
};

Person.sayHello(); // 输出: Hello!

function Person(firstName, lastName) {
  this.firstName = firstName;
  this.lastName = lastName;
}

Person.prototype.fullName = function() {
  return this.firstName + " " + this.lastName;
};

const person1 = new Person("John", "Doe");
console.log(person1.fullName()); // 输出: John Doe

const person = {
  firstName: "John",
  lastName: "Doe",
  get fullName() {
    return this.firstName + " " + this.lastName;
  },
  set fullName(value) {
    const parts = value.split(" ");
    this.firstName = parts[0];
    this.lastName = parts[1];
  }
};

console.log(person.fullName); // 输出: John Doe
person.fullName = "Jane Smith";
console.log(person.firstName); // 输出: Jane
console.log(person.lastName); // 输出: Smith

const person = {
  firstName: "John",
  lastName: "Doe",
  fullName: () => {
    return this.firstName + " " + this.lastName; // 这里的this指向全局对象或undefined（在严格模式下）
  }
};

console.log(person.fullName()); // 可能会输出: undefined undefined