niuniu/lionfish_comshop/components/orderInfo/index.js

// lionfish_comshop/components/orderInfo/index.js
Component({
  /**
   * 组件的属性列表
   */
  properties: {
    orderInfo: {
      type: Object,
      observer: function (t) {
        let real_total = t.real_total * 1;
        let total = t.total * 1;
        var goodsTotal = parseFloat(real_total) - parseFloat(t.shipping_fare);
        
        let disAmount = parseFloat(t.voucher_credit) + parseFloat(t.fullreduction_money);
        disAmount = (disAmount > goodsTotal) ? goodsTotal : disAmount;
        this.setData({
          goodsTotal: goodsTotal.toFixed(2),
          disAmount: disAmount.toFixed(2)
        });
      }
    }
  },

  /**
   * 组件的初始数据
   */
  data: {
    disAmount: 0,
    goodsTotal: 0
  }
})