vue3使用element-plus 树组件（el-tree）数据回显_vue3 el-tree ref

html

<el-tree ref="treeRef" :data="data" show-checkbox :default-expand-all="false" node-key="id" highlight-current
        :props="defaultProps" @check="handleCheckChange" />

js

// 编辑按钮
let Jedit = (row: any) => {
  console.log(row);
  dialogFormVisible.value = true
  adds.value = false
  edits.value = true
  charnam.value = row.name
  RoleType.value = row.type == 1 ? '超管' : row.type == 2 ? "劳务公司" : row.type == 3 ? "项目部" : "审核员"
  Mid.value = row.menus
  row.value = row.menus
  
//数据回显，row.menus_id就是接口返回选中的树节点id集合
//菜单树数据
  menuVos.value = row.menus
  //数据回显操作
  nextTick(() => {
    const arr: any = []
    row.menus_id.forEach((item: any) => {
      if (
        !treeRef.value?.getNode(item).childNodes ||
        !treeRef.value?.getNode(item).childNodes.length
      ) {
        arr.push(item)
      }
    })
    roleForm.menuIds = arr
    treeRef.value?.setCheckedKeys(arr)
  })
};

const menuVos = ref([]) //菜单树列表
const roleForm: any = reactive({})
function handleCheckChange(data1: any, data2: any) {
  // 选中的子节点
  const checkedKeys = data2.checkedKeys
  // 选中的父节点
  const halfCheckedKeys = data2.halfCheckedKeys
  checkMenuList.value = [...checkedKeys, ...halfCheckedKeys]
}

非常好用，拿过来修改一下check事件，ref获取就直接可以使用了