1.组件：是vue最强大的功能之一，组件化开发，可扩展HTML元素，封装可重用的代码。
<body>
<div id='app'>
<my-component></my-component>
<my-component></my-component>
<my-component></my-component>
<my-component></my-component>
<my-component></my-component>
<ul>
<li></li>
</ul>
</div>
<script src='js/vue.js'></script>
<script>
//全局：
Vue.component('my-component',{
template:`
<ul>
<li></li>
</ul>
`
})
new Vue({
el:'#app',
components:{
'my-component':{
template:``
}
}
})
</script>
</body>
2.组件之间的传值：
父传子：用属性传:
<body>
<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>
</body>
例子：水果列表
<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>
购物车
<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},
]
}
}
})
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:50
}
},
methods:{
add:function(ind){
this.list[ind].count++ ;
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--
}
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>
2.子传父：用事件 click $emit
<body>
<div id='app'>
<my-father></my-father>
</div>
<script src='js/vue.js'></script>
<script>
Vue.component('my-father',{
template:`
<div>
<h1>{{mess}}</h1>
<my-child @send='revMsg'></my-child>
</div>
`,
data:function(){
return{
mess:''
}
},
methods:{
revMsg:function(txt){
this.mess=txt
}
}
})
Vue.component('my-child',{
template:`
<button @click='sendFather'>给父组件</button>
`,
data:function(){
return{
msg:hello world'
}
},
methods:{
sendFather:function(){
// this.$emit('自定义事件',参数)
this.$emit('send',this.msg)
}
}
})
new Vue({
el:"#app"
})
</script>
</body>
例子：添加value
<body>
<div id="app">
<my-father></my-father>
</div>
<script src="js/vue.js"></script>
<script>
Vue.component("my-father", {
template: `
<div>
<h1>这是父组件</h1>
<p>子组件传来的数据为:{{mess}}</p>
<my-child @send="revMsg"></my-child>
</div>
`,
data: function() {
return {
mess: ""
}
},
methods: {
revMsg: function(txt) {
this.mess = txt
}
}
})
Vue.component("my-child", {
template: `
<div>
<h1>这是子组件</h1>
<input type="text" v-model="msg">
<button @click='sendFather'>向父组件传递参数</button>
</div>
`,
data: function() {
return {
msg: ''
}
},
methods: {
sendFather: function() {
this.$emit("send", this.msg)
}
}
})
new Vue({
el: "#app"
})
</script>
</body>
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