vue3-yuanma/packages/vue/examples/transition/list.html

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<script src="../../../../node_modules/lodash/lodash.min.js"></script>
2019-12-03 04:22:04 +08:00
<script src="../../dist/vue.global.js"></script>
<div id="app">
<button @click="insert">insert at random index</button>
<button @click="reset">reset</button>
<button @click="shuffle">shuffle</button>
<transition-group tag="ul" name="fade" class="container">
<item v-for="item in items"
class="item"
:msg="item"
:key="item"
@rm="remove(item)">
</item>
</transition-group>
</div>
<script>
const getInitialItems = () => [1, 2, 3, 4, 5]
let id = getInitialItems().length + 1
const Item = {
props: ['msg'],
template: `<div>{{ msg }} <button @click="$emit('rm')">x</button></div>`
}
const App = {
components: {
Item
},
data() {
return {
items: getInitialItems()
}
},
methods: {
insert () {
const i = Math.round(Math.random() * this.items.length)
this.items.splice(i, 0, id++)
},
reset () {
this.items = getInitialItems()
},
shuffle () {
this.items = _.shuffle(this.items)
},
remove (item) {
const i = this.items.indexOf(item)
if (i > -1) {
this.items.splice(i, 1)
}
}
}
}
Vue.createApp().mount(App, '#app')
</script>
<style>
.container {
position: relative;
padding: 0;
}
.item {
width: 100%;
height: 30px;
background-color: #f3f3f3;
border: 1px solid #666;
box-sizing: border-box;
}
/* 1. declare transition */
.fade-move, .fade-enter-active, .fade-leave-active {
transition: all .5s cubic-bezier(.55,0,.1,1);
}
/* 2. declare enter from and leave to state */
.fade-enter-from, .fade-leave-to {
opacity: 0;
transform: scaleY(0.01) translate(30px, 0);
}
/* 3. ensure leaving items are taken out of layout flow so that moving
animations can be calculated correctly. */
.fade-leave-active {
position: absolute;
}
</style>