修改倒数计时脚本，以允许每页多个倒数计时

Question

我正在使用CodePen中的以下脚本

// Create Countdown
var Countdown = {

    // Backbone-like structure
    $el: $('.countdown'),

    // Params
    countdown_interval: null,
    total_seconds     : 0,

    // Initialize the countdown  
    init: function() {

    // DOM
        this.$ = {
        hours  : this.$el.find('.bloc-time.hours .figure'),
        minutes: this.$el.find('.bloc-time.min .figure'),
        seconds: this.$el.find('.bloc-time.sec .figure')
    };

    // Init countdown values
    this.values = {
            hours  : this.$.hours.parent().attr('data-init-value'),
        minutes: this.$.minutes.parent().attr('data-init-value'),
        seconds: this.$.seconds.parent().attr('data-init-value'),
    };

    // Initialize total seconds
    this.total_seconds = this.values.hours * 60 * 60 + (this.values.minutes * 60) + this.values.seconds;

    // Animate countdown to the end 
    this.count();    
    },

    count: function() {

    var that    = this,
        $hour_1 = this.$.hours.eq(0),
        $hour_2 = this.$.hours.eq(1),
        $min_1  = this.$.minutes.eq(0),
        $min_2  = this.$.minutes.eq(1),
        $sec_1  = this.$.seconds.eq(0),
        $sec_2  = this.$.seconds.eq(1);

        this.countdown_interval = setInterval(function() {

        if(that.total_seconds > 0) {

            --that.values.seconds;              

            if(that.values.minutes >= 0 && that.values.seconds < 0) {

                that.values.seconds = 59;
                --that.values.minutes;
            }

            if(that.values.hours >= 0 && that.values.minutes < 0) {

                that.values.minutes = 59;
                --that.values.hours;
            }

            // Update DOM values
            // Hours
            that.checkHour(that.values.hours, $hour_1, $hour_2);

            // Minutes
            that.checkHour(that.values.minutes, $min_1, $min_2);

            // Seconds
            that.checkHour(that.values.seconds, $sec_1, $sec_2);

            --that.total_seconds;
        }
        else {
            clearInterval(that.countdown_interval);
        }
    }, 1000);    
    },

    animateFigure: function($el, value) {

        var that         = this,
                $top         = $el.find('.top'),
            $bottom      = $el.find('.bottom'),
            $back_top    = $el.find('.top-back'),
            $back_bottom = $el.find('.bottom-back');

    // Before we begin, change the back value
    $back_top.find('span').html(value);

    // Also change the back bottom value
    $back_bottom.find('span').html(value);

    // Then animate
    TweenMax.to($top, 0.8, {
        rotationX           : '-180deg',
        transformPerspective: 300,
            ease                : Quart.easeOut,
        onComplete          : function() {

            $top.html(value);

            $bottom.html(value);

            TweenMax.set($top, { rotationX: 0 });
        }
    });

    TweenMax.to($back_top, 0.8, { 
        rotationX           : 0,
        transformPerspective: 300,
            ease                : Quart.easeOut, 
        clearProps          : 'all' 
    });    
    },

    checkHour: function(value, $el_1, $el_2) {

    var val_1       = value.toString().charAt(0),
        val_2       = value.toString().charAt(1),
        fig_1_value = $el_1.find('.top').html(),
        fig_2_value = $el_2.find('.top').html();

    if(value >= 10) {

        // Animate only if the figure has changed
        if(fig_1_value !== val_1) this.animateFigure($el_1, val_1);
        if(fig_2_value !== val_2) this.animateFigure($el_2, val_2);
    }
    else {

        // If we are under 10, replace first figure with 0
        if(fig_1_value !== '0') this.animateFigure($el_1, 0);
        if(fig_2_value !== val_1) this.animateFigure($el_2, val_1);
    }    
    }
};

// Let's go !
Countdown.init();

我一直在试图弄清楚如何修改它以支持每页多个倒数计时器。

到目前为止，我的方法是尝试添加一个数字计数器，以使每个“倒数”元素都具有一个唯一的类，然后修改脚本以在每个元素上运行，但这是行不通的，而且我认为不会。

我不知道还有什么其他方法可以解决，尽管如此，我们将不胜感激。

Answer 1

You can create a new instance of this object with just a little bit of refactoring by converting it into a function.

For example, if you clone your <div class="countdown"/> HTML, and in JS you call:

new Countdown($($('.countdown')[0])).init();
new Countdown($($('.countdown')[1])).init();

Or, alternatively you could also initialize all .countdowns on page with:

$('.countdown').each((_, el) => (new Countdown($(el)).init()));

you will have two unique instances of the countdown.

new Countdown($($('.countdown')[0])).init();
new Countdown($($('.countdown')[1])).init();

$('.countdown').each((_, el) => (new Countdown($(el)).init()));

// Create Countdown
function Countdown(node) {
  this.$el = node;
  this.countdown_interval = null;
  this.total_seconds = 0;
  this.init = function() {
    // DOM
    this.$ = {
      hours: this.$el.find('.bloc-time.hours .figure'),
      minutes: this.$el.find('.bloc-time.min .figure'),
      seconds: this.$el.find('.bloc-time.sec .figure')
    };

    // Init countdown values
    this.values = {
      hours: this.$.hours.parent().attr('data-init-value'),
      minutes: this.$.minutes.parent().attr('data-init-value'),
      seconds: this.$.seconds.parent().attr('data-init-value'),
    };

    // Initialize total seconds
    this.total_seconds = (this.values.hours * 60 * 60) +
      (this.values.minutes * 60) +
      this.values.seconds;
    // Animate countdown to the end 
    this.count();
  };
  this.count = function() {
    let that = this,
      $hour_1 = this.$.hours.eq(0),
      $hour_2 = this.$.hours.eq(1),
      $min_1 = this.$.minutes.eq(0),
      $min_2 = this.$.minutes.eq(1),
      $sec_1 = this.$.seconds.eq(0),
      $sec_2 = this.$.seconds.eq(1);

    this.countdown_interval = setInterval(function() {
      if (that.total_seconds > 0) {
        --that.values.seconds;
        if (that.values.minutes >= 0 && that.values.seconds < 0) {
          that.values.seconds = 59;
          --that.values.minutes;
        }

        if (that.values.hours >= 0 && that.values.minutes < 0) {
          that.values.minutes = 59;
          --that.values.hours;
        }

        // Update DOM values
        // Hours
        that.checkHour(that.values.hours, $hour_1, $hour_2);
        // Minutes
        that.checkHour(that.values.minutes, $min_1, $min_2);
        // Seconds
        that.checkHour(that.values.seconds, $sec_1, $sec_2);

        --that.total_seconds;
      } else {
        clearInterval(that.countdown_interval);
      }
    }, 1000);
  };
  this.animateFigure = function($el, value) {
    let that = this,
      $top = $el.find('.top'),
      $bottom = $el.find('.bottom'),
      $back_top = $el.find('.top-back'),
      $back_bottom = $el.find('.bottom-back');

    // Before we begin, change the back value
    $back_top.find('span').html(value);

    // Also change the back bottom value
    $back_bottom.find('span').html(value);

    // Then animate
    TweenMax.to($top, 0.8, {
      rotationX: '-180deg',
      transformPerspective: 300,
      ease: Quart.easeOut,
      onComplete: function() {
        $top.html(value);
        $bottom.html(value);
        TweenMax.set($top, {
          rotationX: 0
        });
      }
    });

    TweenMax.to($back_top, 0.8, {
      rotationX: 0,
      transformPerspective: 300,
      ease: Quart.easeOut,
      clearProps: 'all'
    });
  };
  this.checkHour = function(value, $el_1, $el_2) {
    let val_1 = value.toString().charAt(0),
      val_2 = value.toString().charAt(1),
      fig_1_value = $el_1.find('.top').html(),
      fig_2_value = $el_2.find('.top').html();

    if (value >= 10) {
      // Animate only if the figure has changed
      if (fig_1_value !== val_1) this.animateFigure($el_1, val_1);
      if (fig_2_value !== val_2) this.animateFigure($el_2, val_2);
    } else {
      // If we are under 10, replace first figure with 0
      if (fig_1_value !== '0') this.animateFigure($el_1, 0);
      if (fig_2_value !== val_1) this.animateFigure($el_2, val_1);
    }
  }
}

// Let's go !
new Countdown($($('.countdown')[0])).init();
new Countdown($($('.countdown')[1])).init();

// Alternatively you could also initialize all countdowns on page with:
// $('.countdown').each((i, el) => (new Countdown($(el)).init()));

Here's a link to the updated codepen.

Hope this helps,