Vue实现图书管理案例

<style type="text/css">
    .grid {
      margin: auto;
      width: 550px;
      text-align: center;
    }

    .grid table {
      width: 100%;
      border-collapse: collapse;
    }

    .grid th,
    td {
      padding: 10;
      border: 1px dashed orange;
      height: 35px;
    }

    .grid th {
      background-color: orange;
    }

    .grid .book {
      width: 550px;
      padding-bottom: 10px;
      padding-top: 5px;
      background-color: lawngreen;
    }

    .grid .total {
      height: 30px;
      line-height: 30px;
      background-color: lawngreen;
      border-top: 1px solid orange;
    }
</style>

<div id="app">
    <div class='grid'>
      <div>
        <h1>图书管理</h1>
        <div class="book">
          <div>
            <label for='id'>
              编号：
            </label>
            <input type="text" id="id" v-model='id' :disabled='flag' v-focus>
            <label for="name">
              名称：
            </label>
            <input type="text" id='name' v-model='name'>
            <button @click='handle' :disabled='submitFlag'>提交</button>
          </div>
        </div>
      </div>
      <div class='total'>
        <span>图书总数：</span><span>{{total}}</span>
      </div>
      <table>
        <thead>
          <tr>
            <th>编号</th>
            <th>名称</th>
            <th>时间</th>
            <th>操作</th>
          </tr>
        </thead>
        <tbody>
          <tr :key="item.id" v-for="item in books">
            <td>{{item.id}}</td>
            <td>{{item.name}}</td>
            <td>{{item.date | format('yyyy-MM-dd hh:MM:ss')}}</td>
            <td><a href="" @click.prevent='toEdit(item.id)'>修改</a>
              <span>|</span>
              <a href="" @click.prevent='deleteBook(item.id)'>删除</a>
            </td>
          </tr>

        </tbody>
      </table>
    </div>
</div>

<script type="text/javascript" src="../js/vue.js"></script>
  <script type="text/javascript">
    Vue.directive('focus', {
      inserted: function (el) {
        el.focus();
      }
    })
    Vue.filter('format', function (value, arg) {
      function dateFormat(date, format) {
        if (typeof date === "string") {
          var mts = date.match(/(\/Date\((\d +)\)\/)/);
          if (mts && mts.length >= 3) {
            date = parseInt(mts[2]);
          }
        }
        date = new Date(date);
        if (!date || date.toUTCString() == "Invalid Date") {
          return "";
        }
        var map = {
          "M": date.getMonth() + 1, //月份
          "d": date.getDate(), //日
          "h": date.getHours(), //小时
          "m": date.getMinutes(), //分
          "s": date.getSeconds(), //秒
          "q": Math.floor((date.getMonth() + 3) / 3), //季度
          "S": date.getMilliseconds() //毫秒

        };
        format = format.replace(/([yMdhmsqS])+/g, function (all, t) {
          var v = map[t];
          if (v != undefined) {
            if (all.length > 1) {
              v = '0' + v;
              v = v.substr(v.length - 2);
            }
            return v;
          } else if (t === 'y') {
            return (date.getFullYear() + '').substr(4 - all.length);
          }
          return all;
        });
        return format;
      }
      return dateFormat(value, arg);
    })
    var vm = new Vue({
      el: '#app',
      data: {
        flag: false,
        submitFlag: false,
        id: '',
        name: '',
        books: []
      },
      methods: {
        handle: function () {
          if (this.flag) {
            // 编辑操作
            // 就是根据当前id去更新数组中对应的数据
            this.books.some((item) => {
              if (item.id == this.id) {
                item.name = this.name
                // 完成更新操作后终止循环
                return true;
              }
            })
            this.flag = false;
          } else {
            // 添加图书
            var book = {};
            book.id = this.id;
            book.name = this.name;
            this.data = '';
            this.books.push(book);
          }
          // 清空表单
          this.id = '';
          this.name = '';
        }, toEdit: function (id) {
          // 禁止修改id
          this.flag = true;
          // 根据id查询出要编辑的数据
          var book = this.books.filter(function (item) {
            return item.id == id;
          });
          console.log(book)
          // 把获取到的id提交到表单
          this.id = book[0].id;
          this.name = book[0].name;
        },
        deleteBook: function (id) {
          // 删除图书
          // 根据id从数组中查找元素的索引
          // var index = this.books.findIndex(function (item) {
          //   return item.id == id;
          // });
          // 根据索引删除数组元素
          // this.books.splice(index, 1)
          // -----------------
          // 方法2 通过filter方法进行删除
          this.books = this.books.filter(function (item) {
            return item.id != id;
          })
        }
      },
      computed: {
        total: function () {
          // 计算图书的总数
          return this.books.length;
        }
      },
      watch: {
        name: function (val) {
          // 验证图书名称是否已经存在
          var flag = this.books.some(function (item) { return item.name == val; })
          if (flag) {
            // 图书名存在
            this.submitFlag = true
          } else {
            // 图书名不存在
            this.submitFlag = false
          }
        }

      },
      mounted: function () {
        // 该生命周期钩子函数被出发的时候。模板已经可以使用
        // 一般此时用于获取后台数据，然后把数据填充到模板
        var data = [{
          id: 1,
          name: '三国演义',
          date: 252597867777

        }, {
          id: 2,
          name: '水浒传',
          date: 564634563453
        }, {
          id: 3,
          name: '红楼梦',
          date: 345435345343
        }, {
          id: 4,
          name: '西游记',
          date: 345345346533
        }]
        this.books = data
      }
    });
</script>