vue笔记9.20
2018-09-21 本文已影响0人
那年的雨
在vue中父组件向自子组件传递props
子组件向父组件传递属性是用$emit
shopping：
<!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>
浏览器打开：
图片.png
子传父：
<!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>
<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:'张世远是共产主义接班人'
}
},
methods:{
sendFather:function(){
// this.$emit('自定义事件',参数)
this.$emit('send',this.msg)
}
}
})
new Vue({
el:"#app"
})
</script>
</body>
</html>
浏览器打开：
图片.png
图片.png
子组件给父组件传值：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
</head>
<body>
<div id='app'>
<father></father>
</div>
<script src='js/vue.js'></script>
<script>
Vue.component('father',{
template:`
<div>
<h1>{{mess}}</h1>
<son @send='rcvMsg'></son>
</div>
`,
data:function(){
return{
mess:''
}
},
methods:{
rcvMsg:function(txt){
this.mess=txt;
}
}
})
Vue.component('son',{
template:`
<button @click='sendToFather'>我是子组件，我要向父组件传值</button>
`,
data:function(){
return{
msg:'子组件向父组件传值'
}
},
methods:{
sendToFather:function(){
this.$emit('send',this.msg )
}
}
})
new Vue({
el:"#app",
})
</script>
</body>
</html>
