直接上代码
<a-tree-select
show-search
v-model="form.goods_type"
tree-node-filter-prop="title"
style="width: 100%"
:dropdown-style="{
maxHeight: '400px',
overflowY: 'auto',
width: '85%',
minWidth: '',
}"
:tree-data="treeData"
placeholder="请选择"
:treeDefaultExpandedKeys="treeDefaultExpandedKeys"
:getPopupContainer="
triggerNode => {
return triggerNode.parentNode;
}
"
>
</a-tree-select>
:treeDefaultExpandedKeys="treeDefaultExpandedKeys"
这一行是关键
data里面声明即可,里面可以写字符串或者是数值型
treeDefaultExpandedKeys: ['key值'],