格式：this.$emit('自定义事件名'，参数)；
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<div id="app">
<todo>
<todo-title slot="todo-title" :title="title"></todo-title>
<todo-items slot="todo-items" v-for="(item,index) in todoItems"
:items="item" :index="index" v-on:toremove="removeItems(index)" :key="index"></todo-items>
</todo>
</div>
<script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/vue.js"></script>
<script>
//slot插槽
Vue.component("todo",{
template:'<div>\
<slot name="todo-title"></slot>\
<ul>\
<slot name="todo-items"></slot>\
</ul>\
</div>'
});
Vue.component("todo-title",{
props:['title'],
template: '<div>{{title}}</div>'
});
Vue.component("todo-items",{
props:['items'],
template: '<li>{{items}} <button @click="remove">删除</button></li>',
methods: {
remove:function (index) {
//this.$emit 自定义事件分发
this.$emit('toremove',index);
}
}
});
var vm = new Vue({
el:"#app",
data:{
title:"我是标题",
todoItems:['a','b','c']
},
methods:{
removeItems:function (index) {
console.log("删除了："+this.todoItems[index]);
this.todoItems.splice(index,1); //删除当前index的一个元素
}
}
})
</script>
</body>
</html>
效果如下：实现了删除效果
