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?过滤器（格式化日期）
自定义指令（获取表单焦点）
计算属性（统计图书数量）
侦听器（验证图书存在性）
生命周期（图书数据处理）
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<style type="text/css">
.grid {
margin: auto;
width: 500px;
text-align: center;
}
.grid table {
width: 100%;
border-collapse: collapse;
}
.grid th,
td {
padding: 10;
border: 1px dashed orange;
height: 35px;
line-height: 35px;
}
.grid th {
background-color: orange;
}
.grid .book {
padding-bottom: 10px;
padding-top: 5px;
background-color: #F3DCAB;
}
.gride .total {
height: 30px;
line-height: 30px;
background-color: #F3DCAB;
border-top: 1px solid #C2D89A;
}
</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='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 | fomat('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,
"d": date.getDate(),
"h": date.getHours(),
"m": date.getMinutes(),
"s": date.getSeconds(),
"q": Math.floor((date.getMonth() + 3) / 3), //季度
"S": date.getMillisecond() //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: {
id: '',
name: '',
flag: false,
submitFlag: false,
books: []
},
methods: {
handle: function() {
if (this.flag) {
//编辑操作
//根据当前的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，需要终止循环
return true;
}
});
this.flag = false;
} else {
//添加图书
var book = {};
book.id = this.id;
book.name = this.name;
book.date = '';
this.books.push(book);
//清空表单
this.id = '';
this.name = '';
}
this.id = '';
this.name = '';
},
toEdit: function(id) {
this.flag = true
console.log(id)
//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)
//把获取到的信息填充到表单
this.id = book[0].id;
this.name = book[0].name;
},
deleteBook: function(id) {
this.books = this.books.filter(function(item) {
return item.id != id;
});
}
},
//计算属性
computed: {
total: function() {
//计算图书的总数
return this.books.length;
}
},
//监听器
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;
}
}
},
//生命周期
mounted: function() {
//（生命周期：）挂载时 调用后台数据，填充到模板里面
//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: 235262352352
}, {
id: 2,
name: '水浒传',
date: 235235253252
}, {
id: 3,
name: '红楼梦',
date: 523525235225
}, {
id: 4,
name: '西游记',
date: 523525252525
}];
this.books = data;
}
});
</script>
</body>
</html>
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