这个是在若依框架无意中发现的一个下拉树通用组件。@riophae/vue-treeselect 是一个基于 Vue.js 的树形选择器组件,可以用于选择树形结构的数据。它支持多选、搜索、异步加载等功能,可以自定义选项的样式和模板。该组件易于使用和扩展,适用于各种类型的项目。
npm:https://www.npmjs.com/package/@riophae/vue-treeselect
首先安装:
使用自己习惯使用的包管理器安装就可以了
pnpm add @riophae/vue-treeselect
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引入注册:
import Treeselect from '@riophae/vue-treeselect' import '@riophae/vue-treeselect/dist/vue-treeselect.css' export default { components: { Treeselect } }
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基本使用:
<template> <div id="app"> <treeselect v-model="value" :multiple="true" :options="options" /> </div> </template> <script> // import the component import Treeselect from '@riophae/vue-treeselect' // import the styles import '@riophae/vue-treeselect/dist/vue-treeselect.css' export default { // register the component components: { Treeselect }, data() { return { // define the default value value: null, // define options options: [ { id: 'a', label: 'a', children: [ { id: 'aa', label: 'aa', }, { id: 'ab', label: 'ab', } ], }, { id: 'b', label: 'b', }, { id: 'c', label: 'c', } ], } }, } </script>
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里面可配置的属性很多,下面是在源码中看到的:
部分注释百度翻译成中文了,但太多了,懒得挨个翻译了,直接看也大概知道啥意思
props: { /** * 即使有禁用的选定节点,是否允许重置值 */ allowClearingDisabled: { type: Boolean, default: false, }, /** * 选择/取消选择祖先节点时,是否应选择/取消选中其禁用的后代 * 和 allowClearingDisabled 一起使用 */ allowSelectingDisabledDescendants: { type: Boolean, default: false, }, /** * 菜单是否应始终打开 */ alwaysOpen: { type: Boolean, default: false, }, /** * 是否将菜单加到body上 */ appendToBody: { type: Boolean, default: false, }, /** * 是否启用异步搜索模式 */ async: { type: Boolean, default: false, }, /** * 是否自动将组件集中在装载上? */ autoFocus: { type: Boolean, default: false, }, /** * 装载时自动加载根选项。当设置为“false”时,打开菜单时将加载根选项。 */ autoLoadRootOptions: { type: Boolean, default: true, }, /** * 当用户取消选择一个节点时,会自动取消选择其祖先。仅适用于平面模式。 */ autoDeselectAncestors: { type: Boolean, default: false, }, /** * 当用户取消选择节点时,会自动取消选择其子节点。仅适用于平面模式。 */ autoDeselectDescendants: { type: Boolean, default: false, }, /** * 当用户选择一个节点时,会自动选择其祖先。仅适用于平面模式。 */ autoSelectAncestors: { type: Boolean, default: false, }, /** * 当用户选择一个节点时,会自动选择其子节点。仅适用于平面模式。 */ autoSelectDescendants: { type: Boolean, default: false, }, /** * 如果没有文本输入,按退格键是否删除最后一项。 */ backspaceRemoves: { type: Boolean, default: true, }, /** * 在清除所有输入字段之前进行处理的函数。 * 返回“false”以防止清除值 * @type {function(): (boolean|Promise<boolean>)} */ beforeClearAll: { type: Function, default: constant(true), }, /** * 在叶节点之前显示分支节点? */ branchNodesFirst: { type: Boolean, default: false, }, /** * 是否应该缓存每个搜索请求的结果? */ cacheOptions: { type: Boolean, default: true, }, /** * 是否显示重置值的“×”按钮? */ clearable: { type: Boolean, default: true, }, /** * 清楚文本,multiple为true时 */ clearAllText: { type: String, default: 'Clear all', }, /** * 选择后是否清除搜索输入。 * 仅当“multiple”为“true”时使用。 * 对于单选模式,无论道具值如何,它总是**在选择一个选项后清除输入。 */ clearOnSelect: { type: Boolean, default: false, }, /** * “×”按钮的标题。 */ clearValueText: { type: String, default: 'Clear value', }, /** * 选择选项后是否关闭菜单? * 仅当“multiple”为“true”时使用。 */ closeOnSelect: { type: Boolean, default: true, }, /** * 加载时应自动展开多少级别的分支节点。 * 设置Infinity以使所有分支节点在默认情况下展开。 */ defaultExpandLevel: { type: Number, default: 0, }, /** * 在用户开始搜索之前要显示的默认选项集。用于异步搜索模式。 * 当设置为“true”时,将自动加载作为空字符串的搜索查询结果。 * @type {boolean|node[]} */ defaultOptions: { default: false, }, /** * 如果没有文本输入,按delete键是否删除最后一项。 */ deleteRemoves: { type: Boolean, default: true, }, /** * 用于连接隐藏字段值的多个值的分隔符。 */ delimiter: { type: String, default: ',', }, /** * 仅显示与搜索值直接匹配的节点,不包括其祖先。 * * @type {Object} */ flattenSearchResults: { type: Boolean, default: false, }, /** * 是否阻止选择分支节点? */ disableBranchNodes: { type: Boolean, default: false, }, /** * 禁用控制? */ disabled: { type: Boolean, default: false, }, /** * 是否禁用模糊匹配功能? */ disableFuzzyMatching: { type: Boolean, default: false, }, /** *是否启用平面模式。非平面模式(默认)是指: * - 每当检查分支节点时,它的所有子节点也将被检查 * - 每当一个分支节点检查了所有子节点时,该分支节点本身也会被检查 * 设置“true”以禁用此机制 */ flat: { type: Boolean, default: false, }, /** * 将以所有事件作为最后一个参数进行传递。 * 有助于识别事件的起源。 */ instanceId: { // Add two trailing "$" to distinguish from explictly specified ids. default: () => `${instanceId++}$$`, type: [String, Number], }, /** * Joins multiple values into a single form field with the `delimiter` (legacy mode). * 使用“分隔符”将多个值合并到一个表单字段中(传统模式)。 */ joinValues: { type: Boolean, default: false, }, /** * 限制所选选项的显示。 * 其余部分将隐藏在limitText字符串中。 */ limit: { type: Number, default: Infinity, }, /** * Function that processes the message shown when selected elements pass the defined limit. * @type {function(number): string} */ limitText: { type: Function, default: function limitTextDefault(count) { // eslint-disable-line func-name-matching return `and ${count} more` }, }, /** * Text displayed when loading options. */ loadingText: { type: String, default: 'Loading...', }, /** * Used for dynamically loading options. * @type {function({action: string, callback: (function((Error|string)=): void), parentNode: node=, instanceId}): void} */ loadOptions: { type: Function, }, /** * Which node properties to filter on. */ matchKeys: { type: Array, default: constant(['label']), }, /** * Sets `maxHeight` style value of the menu. */ maxHeight: { type: Number, default: 300, }, /** * Set `true` to allow selecting multiple options (a.k.a., multi-select mode). */ multiple: { type: Boolean, default: false, }, /** * Generates a hidden <input /> tag with this field name for html forms. */ name: { type: String, }, /** * Text displayed when a branch node has no children. */ noChildrenText: { type: String, default: 'No sub-options.', }, /** * Text displayed when there are no available options. */ noOptionsText: { type: String, default: 'No options available.', }, /** * Text displayed when there are no matching search results. */ noResultsText: { type: String, default: 'No results found...', }, /** * Used for normalizing source data. * @type {function(node, instanceId): node} */ normalizer: { type: Function, default: identity, }, /** * By default (`auto`), the menu will open below the control. If there is not * enough space, vue-treeselect will automatically flip the menu. * You can use one of other four options to force the menu to be always opened * to specified direction. * Acceptable values: * - `"auto"` * - `"below"` * - `"bottom"` * - `"above"` * - `"top"` */ openDirection: { type: String, default: 'auto', validator(value) { const acceptableValues = ['auto', 'top', 'bottom', 'above', 'below'] return includes(acceptableValues, value) }, }, /** * Whether to automatically open the menu when the control is clicked. */ openOnClick: { type: Boolean, default: true, }, /** * Whether to automatically open the menu when the control is focused. */ openOnFocus: { type: Boolean, default: false, }, /** * Array of available options. * @type {node[]} */ options: { type: Array, }, /** * Field placeholder, displayed when there's no value. */ placeholder: { type: String, default: 'Select...', }, /** * Applies HTML5 required attribute when needed. */ required: { type: Boolean, default: false, }, /** * Text displayed asking user whether to retry loading children options. */ retryText: { type: String, default: 'Retry?', }, /** * Title for the retry button. */ retryTitle: { type: String, default: 'Click to retry', }, /** * Enable searching feature? */ searchable: { type: Boolean, default: true, }, /** * Search in ancestor nodes too. */ searchNested: { type: Boolean, default: false, }, /** * Text tip to prompt for async search. */ searchPromptText: { type: String, default: 'Type to search...', }, /** * Whether to show a children count next to the label of each branch node. */ showCount: { type: Boolean, default: false, }, /** * Used in conjunction with `showCount` to specify which type of count number should be displayed. * Acceptable values: * - "ALL_CHILDREN" * - "ALL_DESCENDANTS" * - "LEAF_CHILDREN" * - "LEAF_DESCENDANTS" */ showCountOf: { type: String, default: ALL_CHILDREN, validator(value) { const acceptableValues = [ALL_CHILDREN, ALL_DESCENDANTS, LEAF_CHILDREN, LEAF_DESCENDANTS] return includes(acceptableValues, value) }, }, /** * Whether to show children count when searching. * Fallbacks to the value of `showCount` when not specified. * @type {boolean} */ showCountOnSearch: null, /** * In which order the selected options should be displayed in trigger & sorted in `value` array. * Used for multi-select mode only. * Acceptable values: * - "ORDER_SELECTED" * - "LEVEL" * - "INDEX" */ sortValueBy: { type: String, default: ORDER_SELECTED, validator(value) { const acceptableValues = [ORDER_SELECTED, LEVEL, INDEX] return includes(acceptableValues, value) }, }, /** * Tab index of the control. */ tabIndex: { type: Number, default: 0, }, /** * The value of the control. * Should be `id` or `node` object for single-select mode, or an array of `id` or `node` object for multi-select mode. * Its format depends on the `valueFormat` prop. * For most cases, just use `v-model` instead. * @type {?Array} */ value: null, /** * Which kind of nodes should be included in the `value` array in multi-select mode. * Acceptable values: * - "ALL" - Any node that is checked will be included in the `value` array * - "BRANCH_PRIORITY" (default) - If a branch node is checked, all its descendants will be excluded in the `value` array * - "LEAF_PRIORITY" - If a branch node is checked, this node itself and its branch descendants will be excluded from the `value` array but its leaf descendants will be included * - "ALL_WITH_INDETERMINATE" - Any node that is checked will be included in the `value` array, plus indeterminate nodes */ valueConsistsOf: { type: String, default: BRANCH_PRIORITY, validator(value) { const acceptableValues = [ALL, BRANCH_PRIORITY, LEAF_PRIORITY, ALL_WITH_INDETERMINATE] return includes(acceptableValues, value) }, }, /** * Format of `value` prop. * Note that, when set to `"object"`, only `id` & `label` properties are required in each `node` object in `value` prop. * Acceptable values: * - "id" * - "object" */ valueFormat: { type: String, default: 'id', }, /** * z-index of the menu. */ zIndex: { type: [Number, String], default: 999, } }
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然后我简单看了一下好像一共向外暴露了6个方法如下:
@input // // 选中触发(第一次回显的时候会触发,清除值的时候会触发, value值为undefined) input事件用于v-model双向绑定组件更新父组件值 @select // 选中触发(清除值的时候不会触发) @deselect // 移除选项时触发 当设置multiple为true时生效 raw为当前移除的对象 @search-change // 搜索触发(输入框输入 值改变时) @open // 展开时触发 @close // 关闭时触发
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下面是我测试的一个例子,一般的需求应该足够了
字体样式简单调了一下
<template> <div class="main"> <div class="tree"> <Treeselect v-model="value" :options="options" :placeholder="'请选择人员'" :normalizer="tenantIdnormalizer" :multiple="true" @input="treeSelectInput" @select="treeSelectChange" @deselect="treeSelectDeselect" @search-change="treeSelectSearch" @open="treeSelectOpen" @close="treeSelectClose" /> </div> </div> </template> <script> import Treeselect from '@riophae/vue-treeselect' import '@riophae/vue-treeselect/dist/vue-treeselect.css' import treeData from './data/tree' export default { data() { return { value: null, options: [] } }, components: { Treeselect }, mounted(){ // 延迟模拟请求数据 setTimeout(() => { this.options = treeData this.value = [111, 113] // 测试回显操作 }, 300) }, methods:{ // 选中触发(第一次回显的时候会触发,清除值的时候会触发, value值为undefined) input事件用于v-model双向绑定组件更新父组件值 treeSelectInput(value, instanceId) { console.log(value, 'input事件') console.log(this.value, 'this.value -- input') // 这个不需要 延迟 }, // 选中触发(清除值的时候不会触发) treeSelectChange(raw, instanceId) { console.log(raw, '当前的对象') setTimeout(() => { // 如果用到this.value 需要setTimeout延迟一下拿到最新的值 console.log(this.value, 'this.value -- select') }) }, // 移除选项时触发 当设置multiple为true时生效 raw为当前移除的对象 treeSelectDeselect(raw, instanceId) { console.log(raw, 'deselect-->>') }, // 搜索 treeSelectSearch(searchQuery, instanceId) { console.log(searchQuery, '当前搜索的值') }, // 展开触发 treeSelectOpen(instanceId) { console.log('展开了') }, // 关闭触发 treeSelectClose(value, instanceId) { console.log(value, '当前的value值') }, // 字段默认 id label 用于规范化数据源 tenantIdnormalizer(node, instanceId) { if (node.children && !node.children.length) { delete node.children } return { id: node.id, label: node.title, children: node.children } } } } </script> <style scoped> .main { width: 100%; height: 100%; padding: 60px 0 0 200px; } .main .tree { width: 240px; height: 40px; } ::v-deep .vue-treeselect__label { color: #606266; } </style>
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测试数据:
export default [ { "title": "系统管理", "parentId": 0, "id": 1, "children": [ { "title": "菜单管理", "parentId": 1, "id": 11, "children": [ { "title": "菜单新增", "parentId": 11, "id": 111 }, { "title": "菜单编辑", "parentId": 11, "id": 112 }, { "title": "菜单删除", "parentId": 11, "id": 113 } ] }, { "title": "角色管理", "parentId": 1, "id": 22, "children": [ { "title": "角色编辑", "parentId": 22, "id": 222 }, { "title": "角色新增", "parentId": 22, "id": 221 }, { "title": "角色删除", "parentId": 22, "id": 223 } ] } ] }, { "title": "用户管理", "parentId": 0, "id": 33, "children": [ { "title": "用户新增", "parentId": 33, "id": 331 }, { "title": "用户编辑", "parentId": 33, "id": 332 }, { "title": "用户删除", "parentId": 33, "id": 333 } ] } ]
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效果如下: