<!DOCTYPE html>
<html>
<head>
<title></title>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<link rel="stylesheet" type="text/css" href="./animate.css">
<script src="./vue.js"></script>
<!-- <script src="http://cdn.staticfile.org/vue/2.6.10/vue.common.dev.js"></script> -->
</head>
<body>
<div id="root">
//性能考慮，儘量不用index作爲key值 <br>
<div v-for="(item) of list" :key="item.id">
{{item.title}}
</div>
<button @click="handBtnClick">add</button>
</div>
<script type="text/javascript">
var count = 0;
var vm = new Vue({
el: "#root",
data: {
list: []
},
methods: {
handBtnClick: function() {
this.list.push({
id: count++,
title: "hello"
});
}
}
});
</script>
</body>
</html>之前是對單個或多個元素之間做切換動畫效果，現在，對一個列表過渡效果，用標籤<transition-group>：
<!DOCTYPE html>
<html>
<head>
<title></title>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<link rel="stylesheet" type="text/css" href="./animate.css">
<script src="./vue.js"></script>
<!-- <script src="http://cdn.staticfile.org/vue/2.6.10/vue.common.dev.js"></script> -->
<style type="text/css">
/*因爲沒有給它命名，所以用默認v開頭的class名*/
.v-enter, .v-leave-to {
opacity: 0;
}
.v-enter-active, .v-leave-active {
transition: opacity 1s;
}
</style>
</head>
<body>
<div id="root">
//性能考慮，儘量不用index作爲key值 <br>
<transition-group>
<div v-for="(item) of list" :key="item.id">
{{item.title}}
</div>
</transition-group>
<button @click="handBtnClick">add</button>
</div>
<script type="text/javascript">
var count = 0;
var vm = new Vue({
el: "#root",
data: {
list: []
},
methods: {
handBtnClick: function() {
this.list.push({
id: count++,
title: "hello"
});
}
}
});
</script>
</body>
</html>爲啥上面的效果是增加的都有漸顯效果呢？
用一對<transition-group>標籤包裹
<transition-group>
<div>hello</div>
<div>hello</div>
<div>hello</div>
</transition-group>
相當於每一個都用一對<transition>標籤包裹
<transition>
<div>hello</div>
</transition>
<transition>
<div>hello</div>
</transition>
<transition>
<div>hello</div>
</transition>