搭建小程序下单系统有哪些

// 假设用户已经选择了商品并点击下单按钮
Page({
  data: {
    cart: [], // 购物车数据
    order: {} // 订单数据
  },
  onLoad: function () {
    // 初始化购物车数据
    this.setData({
      cart: [
        { id: 1, name: '商品A', price: 100, quantity: 1 },
        { id: 2, name: '商品B', price: 200, quantity: 2 }
      ]
    });
  },
  placeOrder: function () {
    const order = {
      items: this.data.cart,
      total: this.calculateTotal(),
      status: 'pending'
    };
    // 发送订单数据到服务器
    wx.request({
      url: 'https://your-server.com/api/orders',
      method: 'POST',
      data: order,
      success: (res) => {
        if (res.statusCode === 200) {
          this.setData({ order: res.data });
          wx.showToast({
            title: '下单成功',
            icon: 'success'
          });
        } else {
          wx.showToast({
            title: '下单失败',
            icon: 'none'
          });
        }
      }
    });
  },
  calculateTotal: function () {
    let total = 0;
    this.data.cart.forEach(item => {
      total += item.price * item.quantity;
    });
    return total;
  }
});