elementUI tree常见问题解决办法

本文详细介绍了如何使用Vue中的树形组件进行各种操作,包括设置节点展开与选中、数据更新后的树刷新、监听节点检查状态变化及实现按层级加载数据等功能。适用于需要处理层级数据的前端开发者。

 

设置节点展开与选中:

let expandNode = this.$refs.treeLazy.getNode(data.data[0]);
expandNode.expand();
this.$refs.treeLazy.setCurrentNode(data.data[0]);

某个数据更新后要重新刷新树的数据:

if (this.$refs.treeLazy && this.$refs.treeLazy.root) {
   this.$refs.treeLazy.root.loaded = false;
   this.$refs.treeLazy.root.loadData();
}

单选树的节点,@check事件触发:

let nodeChecked = this.$refs.treeLazy.getNode(data).checked;
if (nodeChecked) {
   this.$refs.treeLazy.setCheckedNodes([data]);
} else {
   this.$refs.treeLazy.setCheckedNodes([]);
}

树节点按层数加载:

if (node.level === 0) {
	resolve(data)
}
if (node.level === 1) {
	resolve(data1);
}
if (node.level === 2) {
	resolve([])
}

 

D:\2025-2026\Vue.js\vue2>npm i yarn -g npm warn Unknown user config "registnpm". This will stop working in the next major version of npm. npm warn Unknown user config "set". This will stop working in the next major version of npm. npm warn Unknown user config "//registry.npmjs.org/" (https://registry.npmjs.org/). This will stop working in the next major version of npm. npm error code EPERM npm error syscall open npm error path D:\App\Node\node_cache\_cacache\tmp\3a2875ad npm error errno EPERM npm error FetchError: Invalid response body while trying to fetch https://registry.npmmirror.com/yarn: EPERM: operation not permitted, open 'D:\App\Node\node_cache\_cacache\tmp\3a2875ad' npm error at D:\App\Node\node_global\node_modules\npm\node_modules\minipass-fetch\lib\body.js:170:15 npm error at async Response.json (D:\App\Node\node_global\node_modules\npm\node_modules\minipass-fetch\lib\body.js:75:17) npm error at async RegistryFetcher.packument (D:\App\Node\node_global\node_modules\npm\node_modules\pacote\lib\registry.js:98:25) npm error at async RegistryFetcher.manifest (D:\App\Node\node_global\node_modules\npm\node_modules\pacote\lib\registry.js:128:23) npm error at async #fetchManifest (D:\App\Node\node_global\node_modules\npm\node_modules\@npmcli\arborist\lib\arborist\build-ideal-tree.js:1215:20) npm error at async #nodeFromEdge (D:\App\Node\node_global\node_modules\npm\node_modules\@npmcli\arborist\lib\arborist\build-ideal-tree.js:1053:19) npm error at async #buildDepStep (D:\App\Node\node_global\node_modules\npm\node_modules\@npmcli\arborist\lib\arborist\build-ideal-tree.js:917:11) npm error at async Arborist.buildIdealTree (D:\App\Node\node_global\node_modules\npm\node_modules\@npmcli\arborist\lib\arborist\build-ideal-tree.js:182:7) npm error at async Arborist.reify (D:\App\Node\node_global\node_modules\npm\node_modules\@npmcli\arborist\lib\arborist\reify.js:126:5) npm error at async Install.exec (D:\App\Node\node_global\node_modules\npm\lib\commands\install.js:150:5) { npm error code: 'EPERM', npm error errno: 'EPERM', npm error syscall: 'open', npm error path: 'D:\\App\\Node\\node_cache\\_cacache\\tmp\\3a2875ad', npm error type: 'system', npm error requiredBy: '.' npm error } npm error npm error The operation was rejected by your operating system. npm error It's possible that the file was already in use (by a text editor or antivirus), npm error or that you lack permissions to access it. npm error npm error If you believe this might be a permissions issue, please double-check the npm error permissions of the file and its containing directories, or try running npm error the command again as root/Administrator. npm error Log files were not written due to an error writing to the directory: D:\App\Node\node_cache\_logs npm error You can rerun the command with `--loglevel=verbose` to see the logs in your terminal
最新发布
09-05
### ElementUI Tree 组件的使用方法 ElementUI 的 `Tree` 组件是一个用于展示树形结构数据的强大工具[^1]。它支持多种功能,例如节点的选择、展开/折叠控制以及自定义渲染等。 #### 基本属性配置 以下是 `Tree` 组件的一些常用属性及其作用: | 属性名 | 类型 | 默认值 | 描述 | |--------------|----------|-----------|----------------------------------------------------------------------| | data | array | [] | 树形结构的数据源 | | node-key | string | | 每个树节点用来作为唯一标识的属性 | | props | object | {} | 配置选项对象 | | default-expand-all | boolean | false | 是否默认展开所有节点 | 通过设置这些基本属性可以快速构建一棵基础的树状视图[^2]。 #### 示例代码 下面提供了一个简单的例子来说明如何初始化并显示一个带有子项的树形列表: ```vue <template> <el-tree :data="treeData" show-checkbox node-key="id" :props="defaultProps"></el-tree> </template> <script> export default { data() { return { treeData: [{ id: 1, label: 'Parent Node', children: [{ id: 2, label: 'Child Node' }] }], defaultProps: { children: 'children', label: 'label' } }; } }; </script> ``` 此段代码展示了如何利用 Vue.js 和 ElementUI 创建具有复选框功能的基础树形控件[^3]。 #### 节点操作事件处理 除了静态呈现外,还可以监听各种交互行为比如点击某个特定节点时触发相应逻辑动作。常见的有以下几个事件回调函数可供绑定使用: - **node-click**: 当用户单击某节点时调用该方法。 示例实现如下所示: ```javascript handleNodeClick(data){ console.log('Selected:', data); } ``` 随后将其加入到模板部分中的 event handler 定义里即可生效[^4]。 ---
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