关于vue-treeselect绑值、回显等常见问题的总结
目录
- vue-treeselect绑值、回显常见问题
- 这里以表单里的举例
- 最主要的几点就是
- vue3-treeselect绑定数据有bug问题
vue-treeselect绑值、回显常见问题
最近vue-treeselect使用的比较多,分享一波
可以用在表单里,也可以用在可编辑的表格内
这里以表单里的举例
在main.js中引入
import ElTreeSelect from ‘el-tree-select' import Treeselect from ‘@riophae/vue-treeselect' import ‘@riophae/vue-treeselect/dist/vue-treeselect.css' Vue.use(ElTreeSelect) Vue.component(‘TreeSelect', Treeselect)
最主要的几点就是
1、绑值:value=“form.astdeptId”,主要绑的就是id或者code,通过id或code找到对应的label回显
2、options是数据源,正常调接口获取就行了
3、append-to-body="true"这个最好加上,可能会遇到下拉的弹窗打不开或者只有一点点高的情况
4、normalizer就是把我们自己的后端返的数据格式按树插件需要的格式转换
5、select点击事件里赋值
6、插槽slot=“option-label” 是下拉框的值
7、插槽slot=“value-label” 是输入框回显的值
<el-form-item label="上级部门:"> <TreeSelect :value="form.astdeptId" :options="zoneCodeOptions" clearable no-options-text="暂无可用选项" :append-to-body="true" :normalizer="tenantIdnormalizer" open-direction="bottom" placeholder="请选择父级节点" @select="node => tenantIdHandleSelect(node)" > <div slot="option-label" slot-scope="{ node }" style="white-space: nowrap; font-size: 14px"> {{ node.raw.name ? node.raw.name : '' }} </div> <div slot="value-label" slot-scope="{ node }">{{ node.raw.name ? node.raw.name : '' }}</div> </TreeSelect> </el-form-item>
打印node,拿对应的id,label和children
tenantIdnormalizer(node) { if (node.children && !node.children.length) { delete node.children } return { id: node.astdeptId, label: node.name, children: node.children, } },
赋值给 this.form.astdeptId
tenantIdHandleSelect(node) { this.form.astdeptId = node.astdeptId this.form.name = node.name },
vue3-treeselect绑定数据有bug问题
问题,Vue3-treeSelect,在第一次绑定值的时候没有问题,但是第二次开始无法绑定,知道各位有没有什么好的解决方法,我比较菜搞不太懂。
所以,我重写了个简单的,没那么多功能的就只有v-model,options,placeholder,normalizer4个参数,下面把代码贴出来,需要注意的是,placeholder,normalizer这俩是非必须项,如果不需要可以不写,
placeholder不写,默认是空,normalizer不写默认是
{ id: ‘id', label: ‘label', children: ‘children', }
不过大佬们看看代码估计也就懂了
<template> <div class="tree-container"> <el-select ref="singleTree" v-model="singleSelectTreeVal" class="vab-tree-select" clearable :placeholder="placeholder" popper-class="select-tree-popper" value-key="id" @clear="selectTreeClearHandle('single')" > <el-option :value="singleSelectTreeKey"> <el-tree id="singleSelectTree" ref="singleSelectTree" :current-node-key="singleSelectTreeKey" :data="selectTreeData" :default-expanded-keys="selectTreeDefaultSelectedKeys" :highlight-current="true" :node-key="selectTreeDefaultProps.id" :props="selectTreeDefaultProps" @node-click="selectTreeNodeClick" > <template #defalut="{ node }" class="vab-custom-tree-node"> <span class="vab-tree-item">{{ node.label }}</span> </template> </el-tree> </el-option> </el-select> </div> </template>
<script> import { onBeforeMount, onMounted, reactive, toRefs, watch } from 'vue' export default { name: 'VabSingleSelectTree', props: { //这里是绑定参数 modelValue: { type: Number, default: undefined, }, //这里是数组 options: { type: Array, default: undefined, }, //placeholder placeholder: { type: String, default: '', }, //这里是转换方法 normalizer: { type: Object, default: undefined, }, }, emits: ['update:modelValue'], // { emit } setup(props, { emit }) { //$emit('update:modelValue', $event.target.value) const state = reactive({ singleSelectTree: null, singleTree: null, singleSelectTreeKey: props.modelValue, singleSelectTreeVal: null, selectTreeData: props.options, selectTreeDefaultSelectedKeys: [], selectTreeDefaultProps: props.normalizer, }) onBeforeMount(() => { defaultNormalizer() }) //首次加载 onMounted(() => { initialize() }) watch(props, (newValue) => { //这里props里的值不会自动赋值给state中常量,只有第一次过来的时候才会赋值之后需要手动赋值 state.singleSelectTreeKey = newValue.modelValue state.selectTreeData = newValue.options initialize() }) //防止不写Normalizer报错 const defaultNormalizer = () => { if (!state.selectTreeDefaultProps) { state.selectTreeDefaultProps = { id: 'id', label: 'label', children: 'children', } } } //初始化 const initialize = () => { if (state.singleSelectTreeKey != null) { state['singleSelectTree'].setCurrentKey(state.singleSelectTreeKey) // 设置默认选中 let node = state['singleSelectTree'].getNode( state.singleSelectTreeKey ) state.singleSelectTreeVal = node.data[state.selectTreeDefaultProps['label']] state.singleSelectTreeKey = node.data[state.selectTreeDefaultProps['id']] } else { selectTreeClearHandle() } } // 清除单选树选中 const selectTreeClearHandle = () => { state.selectTreeDefaultSelectedKeys = [] clearSelected() emit('update:modelValue', null) state.singleSelectTreeVal = '' state.singleSelectTreeKey = null state['singleSelectTree'].setCurrentKey(null) // 设置默认选中 } const clearSelected = () => { const allNode = document.querySelectorAll( '#singleSelectTree .el-tree-node' ) allNode.forEach((element) => element.classList.remove('is-current')) } const selectTreeNodeClick = (data) => { state.singleSelectTreeVal = data[state.selectTreeDefaultProps['label']] state.singleSelectTreeKey = data[state.selectTreeDefaultProps['id']] emit('update:modelValue', state.singleSelectTreeKey) state['singleTree'].blur() //data // if (data.rank >= this.selectLevel) { // // } } return { ...toRefs(state), selectTreeClearHandle, selectTreeNodeClick, defaultNormalizer, initialize, } }, } </script> <style scoped></style>
/* .vab-hey-message */ .vab-hey-message { @mixin vab-hey-message { min-width: 246px; padding: 15px; background-color: $base-color-white; border-color: $base-color-white; box-shadow: 0 5px 10px rgba(0, 0, 0, 0.15); .el-message__content { padding-right: $base-padding; color: #34495e; } .el-icon-close { color: #34495e; &:hover { opacity: 0.8; } } }
有需要的各位随意取用吧
以上为个人经验,希望能给大家一个参考,也希望大家多多支持我们。
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