前言: 在vue中, 因为element-ui 2.X是没有tree-select组件的,到了element-plus就有了 @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。
1. 安装第三方包
npm i @riophae/vue-treeselect
2. 导入并注册
import Treeselect from '@riophae/vue-treeselect'
import '@riophae/vue-treeselect/dist/vue-treeselect.css'
export default {
components: { Treeselect }
}
3. 基本使用
4. 比较全面的属性配置参考
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)}
*/
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 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,
}
}
5. 插件的的方法配置
@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
6. 最终的效果