Vue实现简单图书管理例子
以下内容整理自网络。
说明
本例主要涵盖以下知识点：
- 数据绑定
- 条件与循环
- 计算属性
- 监听器
- 过滤器
- 常见数组和对象操作
- vue生命周期
示例演示
代码
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>图书管理案例</title>
<style type="text/css">
.grid {
margin: auto;
width: 530px;
text-align: center;
}
.grid table {
border-top: 1px solid #C2D89A;
width: 100%;
border-collapse: collapse;
}
.grid th,td {
padding: 10;
border: 1px dashed #F3DCAB;
height: 35px;
line-height: 35px;
}
.grid th {
background-color: #F3DCAB;
}
.grid .book {
padding-bottom: 10px;
padding-top: 5px;
background-color: #F3DCAB;
}
.grid .total{
margin-top: 10px;
}
</style>
</head>
<body>
<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='add' :disabled='submitFlag'>提交</button>
</div>
</div>
</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='toDelete(item.id)'>删除</a>
</td>
</tr>
</tbody>
</table>
<div class="total">
<span>图书总数：</span>
<span>{{total}}</span>
</div>
</div>
</div>
<script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
<script type="text/javascript">
// 聚焦指令
Vue.directive('focus', {
inserted: function (el) {
el.focus();
}
});
// 自定义日期过滤器
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: {
submitFlag: false,
flag: false,
id:'',
name:'',
books:[]
},
methods: {
add: function(){
// 修改
if(this.flag){
// 根据当前ID更新数值中的数据
this.books.some((item)=>{
if(item.id == this.id){
item.name=this.name;
item.date=new Date();
// 完成更新后终止循环
return true;
}
})
this.flag=false
}else{
this.flag=false;
var book={};
book.id=this.id;
book.name=this.name;
book.date=new Date();
this.books.push(book);
}
this.id='';
this.name='';
},
toEdit: function(id){
// 根据id查询对象
var book= this.books.filter(function(item){
return item.id==id;
});
this.id=book[0].id;
this.name=book[0].name;
// 禁止修改id
this.flag=true;
},
toDelete: function(id){
// 方法一
var index = this.books.findIndex(function(item){
return item.id==id;
});
this.books.splice(index, 1);
// 方法二
// 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){
var flag = this.books.some(function(item){
return item.name==val;
});
if(flag){
// 名称已存在，禁用提交按钮
this.submitFlag=true;
}else{
this.submitFlag=false;
}
}
},
mounted:function() {
// 模板可用
var data = [{
id:1,
name:'大秦帝国',
date: new Date()
},
{
id:2,
name:'走出剧情',
date: new Date()
},
{
id:3,
name:'活着',
date: new Date()
}];
this.books = data;
}
})
</script>
</body>
</html>
