做项目过程中问题小汇总 | vue3 elementplus js

el-card去除阴影

<el-card style="box-shadow: none;">
</el-card>

el-button按钮加图标

<el-button type="primary" size="default" icon="Plus"
           @click="addRole">添加职位</el-button>

el-table表头的文字居中

:header-cell-style="{textAlign: 'center'}"、加边框 border

<el-table :data="PermisstionArr" style="width: 100%; margin-bottom: 20px" row-key="aid" 
      border :header-cell-style="{textAlign: 'center'}" >
        <el-table-column label="名称" prop="aname"></el-table-column>
        <el-table-column label="权限值" prop="code"></el-table-column>
        <el-table-column label="修改时间" prop="updatetime"></el-table-column>
    </el-table>

el-table树形结构默认展开 default-expand-all

<el-table :data="PermisstionArr" style="width: 100%; margin-bottom: 20px" row-key="aid" 
      border :header-cell-style="{textAlign: 'center'}"  default-expand-all >
 ......
</el-table>

JS找出对象数组中某个key的所有value

let array = [
  { name: 'Apple', aid: 10101 },
  { name: 'Banana', aid: 10102 },
  { name: 'Cherry', aid: 10103 }
];

let allaid = array.map(item=>item.aid)

JS 从一个数组中删除另一个数组中不存在的元素

const aids = [
  10101, 10102, 10103,
  10104, 10201, 10202,
  10203, 10301, 10302,
  10303, 10304
]

const array = [10101, 22222]

22222 在aids中不存在，所以要把 22222 从array数组中剔除

function removeNonExistingElements(arr1, arr2) {
  return arr1.filter(item => arr2.includes(item));
}

const result = removeNonExistingElements(aids , array );

JS 数组截取固定的值

array.slice(开始索引，结束索引)

vue3 控制台怎么不要提示vue warn

• main.ts

const app = createApp(App)
app.config.warnHandler=()=>null

el-tree

setCheckedKeys

setCurrentKey

<el-tree  ref="tree">
</el-tree>

<script>
let tree = ref<any>();//获取tree组件实例
//清空选中的节点
tree.value.setCheckedKeys([])
</script>

el tree 获取选中节点 getCheckedNodes

tree.value.getCheckedNodes()