自定义事件子组件与父组件通信

<div id="app">
<parent @tt="go"></parent>

{{ msg }}
</div>

<script>
var par = {
template: `<div>
<button @click="$emit('tt', 'liang')">点我</button>
</div>`
}
let vm = new Vue({
el: '#app',
data: {
msg: 'init'
},
components: {
parent: par
},
methods: {
go: function(name){
this.msg = name
}
}
})
</script>

<div id="app">
<parent :arts="artList" @change-title="changeTitle"></parent>

{{ msg }}
</div>

<script>
var par = {
template: `
<ul>
<li v-for="art in arts">
<span>{{ art.title }}</span>
<button @click="$emit('change-title', art.title)">点我</button>
</li>
</ul>
`,
props: ['arts']
}

let vm = new Vue({
el: '#app',
data: {
msg: '',
artList: [
{
title: '红色'
},
{
title: '绿色'
},
{
title: '蓝色'
}
]
},
components: {
parent: par
},
methods: {
changeTitle: function(title){
this.msg = title
}
}
})
</script>