Pure jquery implements imitation of Taobao shopping cart settlement

Pure jquery implements imitation of Taobao shopping cart settlement_jquery

WBOY

Release： 2016-05-16 15:44:00

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In this article, all the functions in the shopping cart will be mentioned. Including all-select and single-select amount changes. The amount will also change when the quantity is increased.

Rendering display:

Let’s talk about the general idea:

1. First, calculate the price of a line. This function was mentioned in the previous blog and will not be listed here.

2. Traverse the selected rows and add the values in each row.

3. Assign the value to the total amount and display it. When unchecking or adding or subtracting quantities, the amount will change accordingly.

The following is the specific js part:

<script type="text/javascript">
  $(function(){
    //计算总金额
    function totalMoney(){
      var total_price = 0;
      var total_count = 0;
      $(".d1-input").each(function(){
        if($(this).hasClass('status')) {
          var obj1 = $(this).parent().siblings(".d4").find(".count").val();//获取一行的商品数量
          total_count += parseInt(obj1);
          var obj2= $(this).parent().siblings(".d5").find(".cart-price").text();//获取一行的金额
          total_price += parseInt(obj2);
        }
      });
      $(".item").text(total_count);//将计算出的总金额显示
      $(".total").text(total_price);//将计算出的总数量显示
    }
    //全选
    $(".d-input").toggle( function(){
      $(this).addClass("status");
      $(".sc-mid-list .d1-input").addClass("status");//添加勾选样式
      $(".sc-mid-list").addClass("mouseover");
      totalMoney();
      },
      function(){
      $(this).removeClass("status");
      $(".sc-mid-list .d1-input").removeClass("status");//取消勾选样式
      $(".sc-mid-list").removeClass("mouseover");
      totalMoney();
    });
    // 单选
    $(".d1-input").toggle( function(){
      $(this).addClass("status");//添加勾选样式
      $(this).parents(".sc-mid-list").addClass("mouseover");
      totalMoney();
      },
      function(){
      $(this).removeClass("status");//取消勾选样式
      $(this).parents(".sc-mid-list").removeClass("mouseover");
      totalMoney();
    });
    // 减号样式
    function count(){
      $(".count").each(function(){
        var num = $(this).val();
        if (num == 1) {
          $(this).siblings(".reduce").removeClass("two").addClass("one");
          $(this).siblings(".reduce").attr("disabled","disabled");
        } else {
          $(this).siblings(".reduce").removeClass("one").addClass("two");
        }
      })//根据数量是否为1，改变减号的样式
    }
    // 加
    $(".sc-mid-list .add").click(function(){
      var input = $(this).siblings(".count");
      var obj = $(this).parents(".d4");
      var per = parseFloat(obj.siblings(".d3").find(".per").text());//获取当前一行的单价
      var num = '';
      var price = '';
      input.attr("value", parseInt(input.attr("value")) + 1 );//数量加1
      num = input.attr("value");
      price = num*per;//
      obj.siblings(".d5").find(".cart-price").text(price);
      count();
      totalMoney();
    })
    // 减
    $(".sc-mid-list .reduce").click(function(){
      var input = $(this).siblings(".count");
      var obj = $(this).parents(".d4");
      var per = parseFloat(obj.siblings(".d3").find(".per").text());//获取当前一行的单价
      var num = '';
      var price = '';
      var Val = parseInt(input.attr("value"));
      if(Val <= 1){
        Val = 2;
        }
      input.attr("value", parseInt(Val) - 1 );//数量减1
      num = input.attr("value");
      price = num*per;//
      obj.siblings(".d5").find(".cart-price").text(price);
      count();
    })
  })
</script>

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