1:组件：是Vue组强大的功能之一 组件化开发 组件可以扩展 HTML元素，封装可重用的代码
全局组件：
Vue.component("",{
})
全局组件实例：
<div id='app'>
<my-component></my-component>
</div>
<script src='js/vue.js'></script>
<script>
//全局：
Vue.component('my-component',{
template:`
<div>
<h1>这是一个组件</h1>
<ul>
<li>1111</li>
<li>1111</li>
<li>1111</li>
<li>1111</li>
</ul>
</div>
`
})
new Vue({
el:'#app',
})
</script>
运行结果：
image.png
局部组件：
<div id='app'>
<asd></asd>
</div>
<script src='js/vue.js'></script>
<script>
new Vue({
el:'#app',
data:{},
components:{
'asd':{
template:`
<div>
<h1>这是一个组件</h1>
<ul>
<li>1111</li>
<li>1111</li>
<li>1111</li>
<li>1111</li>
</ul>
</div>
`
}
}
})
</script>
2:组件之间的传值:
父传子 用属性传
子传父 用事件传
同级之间传值
（1）：父传子：
实例
<div id='app'>
<my-content></my-content>
</div>
<script src='js/vue.js'></script>
<script>
Vue.component("my-content",{
template:`
<div>
<h2>我是my-content组件的标题</h2>
<my-child v-bind:message='msg'></my-child>
</div>
`,
data:function(){
return{
msg:'dgddbghfghfnh'
}
}
})
Vue.component("my-child",{
props:['message'],
template:`
<div>
<h3>我是my-child组件中的标题</h3>
<p>{{message}}</p>
</div>
`
})
new Vue({
el:'#app'
})
</script>
360截图20180921101504158.jpg
（2）：子传父
实例：
<div id='app'>
<my-father></my-father>
</div>
<script src='js/vue.js'></script>
<script>
Vue.component('my-father',{
template:`
<div>
<h1>{{mess}}</h1>
<my-child @send='revMsg'></my-child>
</div>
`,
data:function(){
return{
mess:''
}
},
methods:{
revMsg:function(txt){
this.mess=txt
}
}
})
Vue.component('my-child',{
template:`
<button @click='sendFather'>给父组件</button>
`,
data:function(){
return{
msg:'共产主义接班人'
}
},
methods:{
sendFather:function(){
// this.$emit('自定义事件',参数)
this.$emit('send',this.msg)
}
}
})
new Vue({
el:"#app"
})
</script>
运行结果：
360截图20180921101129814.jpg
购物车实例：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
<link rel="stylesheet" href="css/bootstrap.css">
</head>
<body>
<div id='app'>
<my-father></my-father>
</div>
<script src='js/vue.js'></script>
<script>
Vue.component('my-father',{
template:`
<div class='container'>
<table class='table table-bordered text-center'>
<thead>
<tr>
<th class='text-center'>编号</th>
<th class='text-center'>名称</th>
<th class='text-center'>单价</th>
<th class='text-center'>数量</th>
<th class='text-center'>小计</th>
</tr>
</thead>
<my-child v-bind:list='fruList'></my-child>
</table>
</div>
`,
data:function(){
return{
fruList:[
{pname:'apple',price:3,count:3,sub:9},
{pname:'pear',price:4,count:4,sub:16},
{pname:'orange',price:5,count:5,sub:25}
]
}
}
})
Vue.component('my-child',{
props:['list'],
template:`
<tbody>
<tr v-for="(value,index) in list">
<td>{{index+1}}</td>
<td>{{value.pname}}</td>
<td>{{value.price}}</td>
<td>
<button @click='add(index)'>+</button>
<span>{{value.count}}</span>
<button @click='redu(index)'>-</button>
</td>
<td>{{value.sub}}</td>
</tr>
<tr>
<td colspan=5>总价:{{sum}}</td>
</tr>
</tbody>
`,
data:function(){
return{
sum:0
}
},
methods:{
add:function(ind){
this.list[ind].count++ ;
//计算小计
this.list[ind].sub=this.list[ind].count*this.list[ind].price;
this.countSum();
},
redu:function(ind){
if(this.list[ind].count>1){
this.list[ind].count--
}
//计算小计
this.list[ind].sub=this.list[ind].count*this.list[ind].price;
this.countSum();
},
countSum:function(){
for(var i=0,total=0;i<this.list.length;i++){
total+=this.list[i].sub;
}
this.sum=total;
}
}
})
new Vue({
el:'#app'
})
</script>
</body>
</html>
360截图20180921101620609.jpg
添加删除：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
</head>
<body>
<div id='app'>
<my-father></my-father>
</div>
<script src='js/vue.js'></script>
<script>
Vue.component('my-father',{
template:`
<div>
<input type='text' v-model='fruit'> <button @click='add'>添加</button>
<my-child v-bind:fruList='list'></my-child>
</div>
`,
data:function(){
return{
list:['apple','pear','orange'],
fruit:''
}
},
methods:{
add:function(){
this.list.push(this.fruit)
}
}
})
Vue.component('my-child',{
props:['fruList'],
template:`
<ul>
<li v-for="(value,index) in fruList">
{{value}}
<button @click='delt(index)'>删除</button>
</li>
</ul>
`,
methods:{
delt:function(ind){
this.fruList.splice(ind,1)
}
}
})
new Vue({
el:'#app'
})
</script>
</body>
</html>
运行结果：
360截图20180921101631979.jpg
