index.vue
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<template>
<el-select ref="dragSelect" v-model="selectVal" v-bind="$attrs" class="drag-select" multiple v-on="$listeners">
<slot />
</el-select>
</template>
<script>
import Sortable from 'sortablejs'
export default {
name: 'DragSelect',
props: {
value: {
type: Array,
required: true
}
},
computed: {
selectVal: {
get() {
return [...this.value]
},
set(val) {
this.$emit('input', [...val])
}
}
},
mounted() {
this.setSort()
},
methods: {
setSort() {
const el = this.$refs.dragSelect.$el.querySelectorAll('.el-select__tags > span')[0]
this.sortable = Sortable.create(el, {
ghostClass: 'sortable-ghost', // Class name for the drop placeholder,
setData: function(dataTransfer) {
dataTransfer.setData('Text', '')
// to avoid Firefox bug
// Detail see : https://github.com/RubaXa/Sortable/issues/1012
},
onEnd: evt => {
const targetRow = this.value.splice(evt.oldIndex, 1)[0]
this.value.splice(evt.newIndex, 0, targetRow)
}
})
}
}
}
</script>
<style scoped>
.drag-select >>> .sortable-ghost {
opacity: .8;
color: #fff!important;
background: #42b983!important;
}
.drag-select >>> .el-tag {
cursor: pointer;
}
</style>