<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
<script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
<link href="https://cdn.bootcdn.net/ajax/libs/animate.css/2.0/animate.css" rel="stylesheet">
<style>
</style>
</head>
<body>
<div id="app">
count : {{size}}
<input type="text" v-model="inputValue">
<button @click="press">press</button>
<ul>
<fade>
<todo-item :content="i"
v-for="(i,index) in list"
:index="index"
:key="index"
@delete="deleteChild(index)"></todo-item>
</fade>
</ul>
</div>
<script>
Vue.component('fade', {
template: `
<transition-group name="fade"
appear
@before-enter="handleBeforeEnter"
@enter="handleEnter"
appear-active-class="animated tada"
:duration="{ enter: 200, leave: 200 }"
enter-active-class="animated swing"
leave-active-class="animated shake"
>
<slot></slot>
</transition-group>
`,
methods:{
handleBeforeEnter:function (el) {
el.style.color = 'blue'
},
handleEnter(el,done) {
setTimeout(()=>{
el.style.color = 'red'
done()
},2000)
}
}
})
let todoItem = {
props: ['content'],
template: `
<li @click="press">{{content}}</li>
`,
methods: {
press(target) {
this.$emit('delete')
}
}
}
const app = new Vue({
el: '#app',
data: {
list: ['第一', '第二'],
inputValue: '',
count: 0
},
components: {
TodoItem: todoItem
},
methods: {
press: function () {
// alert("press")
this.list.push(app.$data.inputValue)
this.inputValue = ''
},
deleteChild: function (childNode) {
console.log(childNode)
this.list.splice(childNode, 1)
}
},
watch: {
list: function (list, newlist) {
this.count = newlist.length
},
inputValue: function (oldVal, newVal) {
console.log(newVal)
}
},
computed: {
size: {
get() {
return this.count;
},
set(value) {
console.log(value)
}
}
}
})
</script>
</body>
</html>