vue实现拖拽交换位置
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<template>
<div class="root">
<transition-group tag="div" class="container">
<div
class="item"
:class="'item' + i"
v-for="(item, i) in items"
:key="item.key"
:style=" 'background-color': item.color, border: '1px solid' "
draggable="true"
@dragstart="handleDragStart($event, item)"
@dragover.prevent="handleDragOver($event, item)"
@dragenter="handleDragEnter($event, item)"
@dragend="handleDragEnd($event, item)"
>
<div> item </div>
</div>
</transition-group>
</div>
</template>
<script>
export default
name: "Toolbar",
data()
return
items: [
key: 1, color: "#3883a0" ,
key: 2, color: "#4883a0" ,
key: 3, color: "#5883a0" ,
key: 4, color: "#6883a0" ,
key: 5, color: "#7883a0" ,
key: 6, color: "#8883a0" ,
key: 7, color: "#9883a0" ,
],
ending: null,
dragging: null,
;
,
methods:
handleDragStart(e, item)
this.dragging = item;
,
handleDragEnd(e, item)
if (this.ending.key === this.dragging.key)
return;
let newItems = [...this.items];
const src = newItems.indexOf(this.dragging);
const dst = newItems.indexOf(this.ending);
newItems.splice(src, 1, ...newItems.splice(dst, 1, newItems[src]));
console.log(newItems);
this.items = newItems;
this.$nextTick(() =>
this.dragging = null;
this.ending = null;
);
,
handleDragOver(e)
// 首先把div变成可以放置的元素,即重写dragenter/dragover
// 在dragenter中针对放置目标来设置
e.dataTransfer.dropEffect = "move";
,
handleDragEnter(e, item)
// 为需要移动的元素设置dragstart事件
e.dataTransfer.effectAllowed = "move";
this.ending = item;
,
,
;
</script>
<style lang="less" scoped>
.container
display: flex;
flex-wrap: wrap;
.item
width: 200px;
height: 200px;
margin: 10px;
color: #fff;
transition: all linear 0.3s;
.item0
width: 400px;
</style>
效果
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