vue+element实现下拉菜单并带本地搜索功能示例详解

需求:

后台返回数组对像,前端组合成数组,根据name组合成一个个数组并把后台返回的值当成一个children推入数组,在数组中自定义属性备份数据防止搜索的时候改变原数组使得数组无法回退

这里是用的vuex存储,因为多个页面使用同一个接口;所以没必要重复请请求
src\store\module\metadata.js

/*
 * @Author: your name
 * @Date: 2021-09-02 15:46:45
 * @LastEditTime: 2021-09-16 17:39:53
 * @LastEditors: Please set LastEditors
 * @Description: 控制台-数据接入-悬浮菜单
 * @FilePath: \vue-ui\src\store\module\metadata.js
 */
/**
 * 数据资源管理悬浮菜单数据
 */

import { Loading, Message } from 'element-ui'
import { apiManager } from '@/plugins/ajax'

let loadingInstance
const state = {
    allList: [],
    navList: [],
    name: {}
}
const mutations = {
    SET_NAVLIST: (state, list) => {
        // 使用深拷贝,防止页面搜索时报错
        state.navList = list.map(item => {
            if (item.children) {
                item.backList = JSON.stringify(item.children)
            }
        })
    },
    SET_ALLLIST: (state, list) => {
        state.allList = list
    },
    SET_NAME: (state, obj) => {
        Object.assign(state.name, obj)
    }
}
const actions = {
    requestMetadata({ commit, state }, { name, navList }) {
        return new Promise(resolve => {
            const nameKey = Object.keys(state.name)
            if (nameKey.indexOf(name) !== -1) {
                //阻止重复请求
                resolve(state.name[name])
            } else {
                loadingInstance = Loading.service()
                state.name[name] = name
                apiManager
                    .post('/metadata/tableInfo/query')
                    .then(res => {
                        commit('SET_ALLLIST', res.data)
                        for (const i in res.data) {
                            const item = navList.find(v => v.name === i) //把传入的name和请回来的key(name)匹配放入
                            if (item) {
                                item.children = res.data[i] //把请求回来的每个对象下的数组放入对应的Item.children中
                                item.navSearch = ''
                                item.backList = [] //建立备份,在搜索的时候防止改变原数组
                            }
                        }
                        commit('SET_NAVLIST', navList)
                        commit('SET_NAME', { [name]: navList })
                        resolve(navList)
                        loadingInstance.close()
                    })
                    .catch(err => {
                        resolve([])
                        loadingInstance.close()
                        Message.error(err)
                    })
            }
        })
    }
}

export default {
    namespaced: true,
    state,
    mutations,
    actions
}

页面父组件使用子组件
src\views\console\dataAccessManage\dataResourceTable\FileXs.vue

data() {
      return {
          navList: [
              {
                  imgSrc: require('./../../../../../public/images/m6.png'),
                  name: 'ftp',
                  typeName: 'FTP服务器',
                  children: [],
                  total: 0
              },
              {
                  imgSrc: require('./../../../../../public/images/m5.png'),
                  name: 'txt',
                  typeName: '文件服务器',
                  children: [],
                  total: 0
              }
          ],
          
   },
  async mounted() {
    const param = {
        name: 'fileXs',
        navList: this.navList
    }
    // 请求vuex
    this.navlist = await this.$store.dispatch('metadata/requestMetadata', param)
},

子组件
src\views\console\dataAccessManage\components\floatingMenu.vue

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