jquery 객체 지향 작성 방법

// 定义一个名为Person的类
function Person(name, age) {
  this.name = name;
  this.age = age;
}

// 在Person类的原型中添加一个sayHello方法
Person.prototype.sayHello = function() {
  console.log("Hello, my name is " + this.name + " and I'm " + this.age + " years old.");
}

// 定义一个名为Student的类，并继承自Person
function Student(name, age, grade) {
  Person.call(this, name, age);
  this.grade = grade;
}

// 让Student类继承Person类的原型
Student.prototype = Object.create(Person.prototype);
Student.prototype.constructor = Student;

// 在Student类的原型中添加一个study方法
Student.prototype.study = function() {
  console.log(this.name + " is studying for his " + this.grade + "th grade exams.");
}

// 实例化一个Person对象并调用sayHello方法
var person = new Person("Tom", 33);
person.sayHello(); // Hello, my name is Tom and I'm 33 years old.

// 实例化一个Student对象并调用sayHello和study方法
var student = new Student("John", 18, 12);
student.sayHello(); // Hello, my name is John and I'm 18 years old.
student.study(); // John is studying for his 12th grade exams.

// 定义一个jQuery插件
(function($) {
  // 定义一个名为Carousel的类
  function Carousel($el, options) {
    this.$el = $el;
    this.options = $.extend({}, Carousel.DEFAULTS, options);
    this.$items = this.$el.find(this.options.itemSelector);
    this.currentIndex = 0;
    this.init();
  }

  Carousel.DEFAULTS = {
    itemSelector: ".item",
    duration: 1000,
    autoplay: true
  }

  // 在Carousel类的原型中添加init方法
  Carousel.prototype.init = function() {
    this.$items.eq(this.currentIndex).addClass("active");
    if (this.options.autoplay) this.start();
  }

  // 在Carousel类的原型中添加start和stop方法
  Carousel.prototype.start = function() {
    var self = this;
    this.intervalId = setInterval(function() {
      self.next();
    }, this.options.duration);
  }

  Carousel.prototype.stop = function() {
    clearInterval(this.intervalId);
  }

  // 在Carousel类的原型中添加next和prev方法
  Carousel.prototype.next = function() {
    var nextIndex = (this.currentIndex + 1) % this.$items.length;
    this.goTo(nextIndex);
  }

  Carousel.prototype.prev = function() {
    var prevIndex = (this.currentIndex - 1 + this.$items.length ) % this.$items.length;
    this.goTo(prevIndex);
  }

  // 在Carousel类的原型中添加goTo方法
  Carousel.prototype.goTo = function(index) {
    if (index === this.currentIndex) return;
    var $currentItem = this.$items.eq(this.currentIndex);
    var $nextItem = this.$items.eq(index);
    $currentItem.removeClass("active");
    $nextItem.addClass("active");
    this.currentIndex = index;
  }

  // 为jQuery对象添加carousel方法
  $.fn.carousel = function(options) {
    return this.each(function() {
      new Carousel($(this), options);
    });
  }
})(jQuery);