使用vue来实现品牌管理案例的增删功能

<template>
  <div id="app">
    <div class="container">
      <!-- 顶部框模块 -->
      <div class="form-group">
        <div class="input-group">
          <h4>品牌管理</h4>
        </div>
      </div>

      <!-- 数据表格 -->
      <table class="table table-bordered table-hover mt-2">
        <thead>
          <tr>
            <th>编号</th>
            <th>资产名称</th>
            <th>价格</th>
            <th>创建时间</th>
            <th>操作</th>
          </tr>
        </thead>
        <tbody>
          <tr v-for="(item, index) in list" :key="item.id">
            <td>{{ index + 1 }}</td>
            <td>{{ item.name }}</td>

            <!-- 如果价格超过100，就有red这个类 -->
            <td :class="{ red: item.price > 100 }">
              {{ item.price }}
            </td>
            <td>{{ item.time | getTime }}</td>
            <td><a href="#" @click="del(item.id)">删除</a></td>
          </tr>
          <tr>
            <td>统计:</td>
            <td colspan="2">总价格为:{{ totalPrice }}</td>
            <td colspan="2">平均价:{{ avgPrice }}</td>
          </tr>
        </tbody>

        <tfoot>
          <tr v-show="!list.length">
            <td colspan="5" style="text-align: center">暂无数据</td>
          </tr>
        </tfoot>
      </table>

      <!-- 添加资产 -->
      <form class="form-inline">
        <div class="form-group">
          <div class="input-group">
            <input
              type="text"
              class="form-control"
              placeholder="资产名称"
              v-model="obj.name"
            />
          </div>
        </div>
        &nbsp;&nbsp;&nbsp;&nbsp;
        <div class="form-group">
          <div class="input-group">
            <input
              type="text"
              class="form-control"
              placeholder="价格"
              v-model="obj.price"
            />
          </div>
        </div>
        &nbsp;&nbsp;&nbsp;&nbsp;
        <!-- 阻止表单提交 -->
        <button class="btn btn-primary" @click.prevent="btnAdd">
          添加资产
        </button>
      </form>
    </div>
  </div>
</template>

<script>
import moment from "moment";
export default {
  filters: {
    getTime(formatTime) {
      return moment(formatTime).format("yyyy-MM-DD hh:mm:ss");
    },
  },
  data() {
    return {
      name: "", // 名称
      price: 0, // 价格
      list: [
        { id: 100, name: "外套", price: 199, time: new Date("2010-08-12") },
        { id: 101, name: "裤子", price: 34, time: new Date("2013-09-01") },
        { id: 102, name: "鞋", price: 25.4, time: new Date("2018-11-22") },
        { id: 103, name: "头发", price: 19900, time: new Date("2020-12-12") },
      ],
      obj: {
        name: "",
        price: "",
      },
    };
  },
  methods: {
    btnAdd() {
      //点击按钮,追加数据到原数据中
      this.list.push({
        id: this.list.length ? this.list[this.list.length - 1].id + 1 : 1,
        name: this.obj.name,
        price: this.obj.price,
        time: new Date(),
      });
      if (!this.obj.name || !this.obj.price) {
        alert("信息没填");
        return;
      }
      this.obj = "";
    },

    del(id) {
      let index = this.list.findIndex((item) => {
        //有返回值,一定需要return返回结果,否则删除会从最后一个开始
        return item.id == id;
      });
      return this.list.splice(index, 1);
    },
  },
  computed: {
    totalPrice() {
      // let totalPrice = 0;
      // this.list.forEach((ele) => {
      //   totalPrice += ele.price;
      // });
      // return totalPrice; //必须有返回结果,否则totalPrice接收不到结果就不显示

      //利用reduce方法,累计求和 记住,一定要有return返回值,否则不生效
      return this.list.reduce((sum, val) => {
        return (sum += +val.price);
      }, 0);
    },
    avgPrice() {
      return this.totalPrice / this.list.length;
    },
  },
};
</script>

<style   scoped >
.red {
  color: red;
}
</style>