Vue图书管理 Vue实现图书管理小案例
代码在路上 人气:0<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>Document</title> <style> .grid{ margin:auto; width:500px; text-align:center; } .grid table{ width:100%; border-collapse:collapse; } .grid th,td{ padding:10px; border:1px solid orange; height:35px; line-height:35px; } .grid th{ background-color:orange; } .book{ background-color:orange; border-bottom:1px solid #ccc; padding:5px; } input{ width:150px; outline:none; } .grid .total{ height:30px; line-height:30px; background-color:orange; border-bottom:1px solid #ccc; } </style> </head> <body> <div id="app"> <div class="grid"> <div> <h1>图书管理</h1> <div class="book"> <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 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> <script src="js/vue.js"></script> <script> //自定义指令 Vue.directive('focus',{ inserted:function(el){ el.focus(); } }) //过滤器(格式化日期) Vue.filter('format', function(value, arg) { function dataFormat(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 "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 dataFormat(value, arg); }) var vm=new Vue({ el:'#app', data:{ flag:false, submitFlag:false, id:'', name:'', books:[] }, methods:{ handle:function(){ if(this.flag){ //修改操作:就是根据当前的id去更新数组中对应的数据 //箭头函数的this不是window //some方法判断什么时候终止循环 this.books.some((item)=>{ if(item.id==this.id){ item.name=item.name; //完成更新操作之后,要终止循环 return true; } }); this.flag=false; }else{ //添加操作 //添加图书 var book={}; book.id=this.id; book.name=this.name; book.date=new Date(); this.books.push(book); } //清空表单 this.id=''; this.name=''; },//handle结束 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; }); //把获取的信息填充到表单 this.id=book[0].id; this.name=book[0].name; },//toEdit结束 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); //方法二:通过filter方法进行删除 //this.books=this.books.filter(function(item){ //return item.id!=id; //}); }//deleteBook结束 }, computed:{ total:function(){ //计算图书的总数 return this.books.length; } },//computed结束 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){ //图书名称存在 this.submitFlag=true; }else{ this.submitFlag=false; } } },//watch结束 mounted:function(){ //该生命周期钩子函数被触发的时候,模板已经可以使用 //一般用于获取后台数据,然后把数据填充到模板 //模拟接口 var data=[{ id:1, name:'三国演义', date:1585609975000 },{ id:2, name:'水浒传', date:1586609975000 },{ id:3, name:'红楼梦', date:1587609975000 },{ id:4, name:'西游记', date:1588609975000 }]; this.books=data; } }); </script> </body> </html>
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