Mini Program to Implement the Complete Shopping Cart

<view wx:if="{{hasList}}">
  <view class="order_list">
    <view class="order" wx:for="{{list}}" wx:key="{{index}}">
      <view class="xuanze" wx:if="{{item.selected}}" catchtap="selectList" data-index="{{index}}">
        <image src="/images/serch/xuanze.png" />
      </view>
      <view class="xuanze" catchtap="selectList" data-index="{{index}}" wx:else>
        <image src="/images/serch/gouxuan.png" />
      </view>
      <!--List product images-->
      <view class="order_img">
        <image src="{{item.image}}" />
      </view>
      <view class="order_text">
        <view class="text_top">
          <!--List Title-->
          <view class="title">{{item.title}}</view>
          <view class="detel" catchtap="deletes" data-index="{{index}}">
            <image src="/images/serch/detel.png" />
          </view>
        </view>
        <!--Specifications-->
        <view class="size">Specifications: {{item.pro_name}}</view>
        <view class="text_bottom">
          <!--Price-->
          <view class="money">￥{{item.price}}</view>
          <!--Add or subtract product quantity-->
          <view class="number">
            <!--Minus button-->
            <view class="reduce" catchtap="btn_minus" data-obj="{{obj}}" data-index="{{index}}">
              <!--Button Image-->
              <image src="/images/serch/jian-1.png" />
            </view>
            <!--Quantity-->
            <view class="numb">{{item.num}}</view>
            <!--Add button-->
            <view class="add" catchtap="btn_add" data-index="{{index}}">
              <!--Button Image-->
              <image src="/images/serch/add-1.png" />
            </view>
          </view>
        </view>
      </view>
    </view>
  </view>

  <!--Fixed bottom-->
  <view class="buy">
    <view class="buy_top">
      <view class="top_left">
        <view class="left_img" catchtap="selectAll" wx:if="{{selectAllStatus}}">
          <image src="/images/serch/gouxuan.png" />
        </view>
        <view class="left_img" catchtap="selectAll" wx:else>
          <image src="/images/serch/gouxuan.png" />
        </view>
        <view class="left_name">Select All</view>
      </view>
      <view class="top_left">
        <view class="left_img">
          <image src="/images/serch/fenxiang.png" />
        </view>
        <view class="left_name">Share</view>
      </view>
    </view>
    <view class="buy_bottom">
      <view class="buy_left">
        <view class="heji">Total:￥{{totalPrice}}</view>
      </view>
      <view class="buy_right">
        <!--Submit order-->
        <view class="liji " catchtap="btn_submit_order">Buy Now</view>
        <view class="liji two active">Appointment for fitting</view>
      </view>
    </view>
  </view>
</view>
<!--No order in shopping cart-->
<view wx:else>
  <view class="list_none">The shopping cart is empty~</view>
</view>

page {
  background-color: rgba(238, 238, 238, 0.5);
}

.order {
  height: 238rpx;
  background-color: #fefeff;
  margin: 27rpx;
  border-radius: 4rpx;
  display: flex;
  align-items: center;
}

.xuanze {
  width: 40rpx;
  height: 40rpx;
  /* background-color: darkgoldenrod; */
  border-radius: 50%;
  margin: 0 11rpx;
}

.select image {
  width: 100%;
  height: 100%;
  display: block;
  border-radius: 50%;
}

.order_img {
  width: 180rpx;
  height: 180rpx;
}

.order_img image {
  width: 100%;
  height: 100%;
  display: block;
}

.order_text {
  margin-left: 20rpx;
  width: 58%;
  height: 180rpx;
}

.text_top {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.title {
  width: 70%;
  font-size: 28rpx;
  color: #4b5248;
  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 1;
  overflow: hidden;
}

.detel {
  width: 30rpx;
  height: 30rpx;
}

.detel image {
  width: 100%;
  height: 100%;
  display: block;
}

.size {
  font-size: 24rpx;
  color: #a8ada6;
}

.text_bottom {
  display: flex;
  margin-top: 50rpx;
  align-items: center;
  justify-content: space-between;
}

.money {
  font-size: 30rpx;
  color: #a5937f;
}

.number {
  display: flex;
  justify-content: space-around;
  align-items: center;
  width: 170rpx;
}

.reduce {
  width: 46rpx;
  height: 46rpx;
}

.reduce image {
  width: 100%;
  height: 100%;
  display: block;
}

.numb {
  font-size: 30rpx;
  color: #a5937f;
}

.add {
  width: 46rpx;
  height: 46rpx;
}

.add image {
  width: 100%;
  height: 100%;
  display: block;
}

/*Buy button*/

.buy {
  height: 180rpx;
  width: 696rpx;
  position: fixed;
  left: 27rpx;
  bottom: 41rpx;
  background-color: #555555f3;
  border-radius: 4rpx;
}

.buy_top {
  border-bottom: 1px solid rgb(98, 98, 99);
  height: 75rpx;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.top_left {
  display: flex;
  align-items: center;
}

.left_img {
  width: 37rpx;
  height: 37rpx;
  margin: 11rpx;
}

.left_img image {
  width: 100%;
  height: 100%;
  display: block;
}

.left_name {
  font-size: 24rpx;
  color: #fefeff;
  margin-right: 29rpx;
}

.buy_bottom {
  display: flex;
  height: 104rpx;
  justify-content: space-between;
  align-items: center;
  padding: 0rpx 30rpx 0rpx 12rpx;
}

.buy_left {
  font-size: 26rpx;
  color: #fff;
}

.buy_right {
  display: flex;
  align-items: center;
}

.liji {
  width: 180rpx;
  height: 70rpx;
  border: 2rpx solid rgba(248, 248, 248, 1);
  box-sizing: border-box;
  border-radius: 4rpx;
  line-height: 70rpx;
  text-align: center;
  font-size: 26rpx;
  color: #FEFEFF;
}
.two{
  margin-left: 12rpx;
}
.active{
  background-color: #A5937F;
  border: none;
}

Page({

  /**
   * Initial data of the page */
  data: {
    hasList: true, //Default display list data //Product list data list: [{
        id: 1,
        title: 'Gardener's Anti-Wrinkle Essence',
        image: '/images/serch/2.png',
        pro_name: "30ml",
        num: 1,
        price: 180,
        selected: true
      },
      {
        id: 2,
        title: 'Evelyn Rose Hand Cream',
        image: '/images/serch/1.png',
        pro_name: "25g",
        num: 1,
        price: 62,
        selected: true
      },
      {
        id: 2,
        title: 'Oatmeal Goat Milk Soothing Hand Cream',
        image: '/images/serch/2.png',
        pro_name: "75ml",
        num: 1,
        price: 175,
        selected: true
      }
    ],
    //Amount totalPrice: 0, //Total price, initially 0
    //Select All Status selectAllStatus: true, //Select All Status, all selected by default},

  /**
   * Life cycle function--listen for page loading*/
  onLoad: function(options) {

  },

  /**
   * Life cycle function--monitor page display*/
  onShow: function() {
    wx.showToast({
      title: 'Loading',
      icon: "loading",
      duration: 1000
    })
    //Price method this.count_price();

  },

  /** Current product selection event*/
  selectList(e) {
    var that = this;
    //Get the selected radio index var index = e.currentTarget.dataset.index;
    //Get the product list data var list = that.data.list;
    //Select all by default that.data.selectAllStatus = true;
    //Loop array data, judge -- selected/unselected [selected]
    list[index].selected = !list[index].selected;
    //If all array data is selected[true], select all for (var i = list.length - 1; i >= 0; i--) {
      if (!list[i].selected) {
        that.data.selectAllStatus = false;
        break;
      }
    }
    // Re-render data that.setData({
      list: list,
      selectAllStatus: that.data.selectAllStatus
    })
    // Call the method to calculate the amount that.count_price();
  },

  // delete deletes(e) {
    var that = this;
    // Get the index const index = e.currentTarget.dataset.index;
    // Get product list data let list = this.data.list;
    wx.showModal({
      title: 'Tips',
      content: 'Are you sure to delete?',
      success: function(res) {
        if (res.confirm) {
          // Delete index from 1
          list.splice(index, 1);
          // Page rendering data that.setData({
            list: list
          });
          // If the data is empty if (!list.length) {
            that.setData({
              hasList: false
            });
          } else {
            // Call the amount rendering data that.count_price();
          }
        } else {
          console.log(res);
        }
      },
      fail: function(res) {
        console.log(res);
      }
    })
  },

  /** Shopping cart full selection event*/
  selectAll(e) {
    // Select all ICONs by default let selectAllStatus = this.data.selectAllStatus;
    // true ----- false
    selectAllStatus = !selectAllStatus;
    // Get product data let list = this.data.list;
    // Loop through the list to determine whether the data is selected for (let i = 0; i < list.length; i++) {
      list[i].selected = selectAllStatus;
    }
    // Page re-rendering this.setData({
      selectAllStatus: selectAllStatus,
      list: list
    });
    // Calculate the amount method this.count_price();
  },

  /** Binding plus quantity event*/
  btn_add(e) {
    // Get the clicked index const index = e.currentTarget.dataset.index;
    // Get product data let list = this.data.list;
    // Get the number of products let num = list[index].num;
    // Click to increment num = num + 1;
    list[index].num = num;
    // Re-render --- show the new quantity this.setData({
      list: list
    });
    // Calculate the amount method this.count_price();
  },

  /**
   * Bind quantity reduction event */
  btn_minus(e) {
    // // Get the clicked index const index = e.currentTarget.dataset.index;
    // const obj = e.currentTarget.dataset.obj;
    // console.log(obj);
    // Get product data let list = this.data.list;
    // Get the number of products let num = list[index].num;
    // Check if num is less than or equal to 1 return; Click invalid if (num <= 1) {
      return false;
    }
    // else num is greater than 1, click the subtraction button--
    num = num - 1;
    list[index].num = num;
    // Render the page this.setData({
      list: list
    });
    // Call the method to calculate the amount this.count_price();
  },

  // Submit order btn_submit_order() {
    var that = this;
    console.log(that.data.totalPrice);

    //Call for payment // wx.requestPayment(
    // {
    // 'timeStamp': '',
    // 'nonceStr': '',
    // 'package': '',
    // 'signType': 'MD5',
    // 'paySign': '',
    // 'success': function (res) { },
    // 'fail': function (res) { },
    // 'complete': function (res) { }
    // })
    wx.showModal({
      title: 'Tips',
      content: 'Total amount -' + that.data.totalPrice + "Not yet developed",
    })
  },

  /**
   * Calculate total price */
  count_price() {
    // Get product list data let list = this.data.list;
    //Declare a variable to receive the array list price
    let total = 0;
    // Loop through the list to get each data for (let i = 0; i < list.length; i++) {
      // Determine whether to select and calculate the price if (list[i].selected) {
        // add up all the prices count_money
        total += list[i].num * list[i].price;
      }
    }
    //Finally assign the value to data and render it to the page this.setData({
      list: list,
      totalPrice: total.toFixed(2)
    });
  },

})