Vue+element implements drop-down menu with local search function example

need:

The backend returns an array object, which is combined into an array on the frontend. The arrays are combined into arrays according to the name and the value returned by the backend is pushed into the array as a child. Custom attributes are used to back up data in the array to prevent the original array from being changed during the search, making the array unable to be rolled back.

insert image description here

Vuex storage is used here, because multiple pages use the same interface; so there is no need to repeat the request
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: Console-Data Access-Floating Menu* @FilePath: \vue-ui\src\store\module\metadata.js
 */
/**
 * Data resource management floating menu data */

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

let loadingInstance
const state = {
    allList: [],
    navList: [],
    name: {}
}
const mutations = {
    SET_NAVLIST: (state, list) => {
        // Use deep copy to prevent page search errors 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) {
                //Prevent duplicate requests 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) //Match the passed in name with the returned key(name) and put it in if (item) {
                                item.children = res.data[i] //Put the array under each object requested back into the corresponding Item.children item.navSearch = ''
                                item.backList = [] //Create a backup to prevent changes to the original array during search}
                        }
                        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
}

Page parent component uses child component
src\views\console\dataAccessManage\dataResourceTable\FileXs.vue

 <transition name="component-fade" mode="out-in">
   <floating-menu v-show="isCollapse" :newList='navList' @getDatails='getDatails' />
</transition>

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

Subcomponents
src\views\console\dataAccessManage\components\floatingMenu.vue

<!--
 * @Author: your name
 * @Date: 2021-09-02 14:01:58
 * @LastEditTime: 2021-09-16 17:43:10
 * @LastEditors: Please set LastEditors
 * @Description: Floating menu in data resource table* @FilePath: \vue-ui\src\views\console\dataAccessManage\components\floatingMenu.vue
-->
<template>
    <div class="data-sheet-main__nav" v-if="sjktcList.length || newList.length">
        <div>
            <div class="nav__item" v-for="(item,index) in sjktcList" :key="'info2-' + index">
                <div class="item_name sjk_name" :class="{ sjk_active: sjkActive == index }" @click="sjktcShow(item.type,index)">{{item.typeName}}</div>
            </div>
        </div>
        <!-- file -->
        <el-collapse class="nav__item" v-model="activeNames">
            <el-collapse-item class="item_name" :title="item.typeName" :name="item.typeName" v-for="(item,index) in newList" :key="index">
                <ul class="nav__item__list">
                    <li class="list__li">
                        <el-input v-input-val-bg v-model="item.navSearch" @input="handleNavSearch(item)" prefix-icon="el-icon-search" size="mini" placeholder="Please enter keywords" clearable></el-input>
                    </li>
                    <li v-for="(key,i) in item.children" :key="i" :class="{ 'list__li--active': key.id == dbId }" class="list__li" @click="getDatails(key,item)">
                        <span :title="key.name" class="list--title">{{key.name}}</span>
                        <span class="list--count">{{key.total || 0}}</span>
                    </li>
                    <li class="no-data" v-if="!item.children.length">No data</li>
                </ul>
            </el-collapse-item>
        </el-collapse>
    </div>
</template>
<script>
import { debounce } from '@/utils'
export default {
    name: 'floatingMenu',
    props: {
        sjktcList: {
            type: Array,
            default: () => []
        },
        newList: {
            type: Array,
            default: () => []
        }
    },
    components: {},
    data() {
        return {
            sjkActive: 0,
            navSearch: '',
            navChildData: [],
            dbId: '',
            activeNames: []
        }
    },
    mounted() {
    },
    methods: {
        // Click on the content in the list getDatails(args, db) {
            this.dbId = args.id
            this.$emit('getDatails', { args, db })
        },
        // eslint-disable-next-line space-before-function-paren
        handleNavSearch:debounce(function (obj) {
            this.$forceUpdate()//Prevent input box assignment failure const currlist = JSON.parse(obj.backList)
            if (obj.navSearch == '') {
                obj.children = currlist
            } else {
                obj.children = currlist.filter(item => {
                    return item.name.toLowerCase().indexOf(obj.navSearch.toLowerCase()) != -1
                })
            }
        }, 100),
        sjktcShow(type, i) {
            this.sjkActive = i
            this.$emit('sjktcShow', [type])
        }
    },
    watch:
        newList: {
            deep: true,
            handler(list) {
                if (list) {
                    // By default, the 0 menus under the expanded list are activated for (let i = 0; i < list.length; i++) {
                        const item = list[i]
                        if (!this.dbId && item.children.length) {
                            this.activeNames = item.typeName
                            this.getDatails(item.children[0], item) //Default request for the first data content}
                    }
                }
            }
        }
    }
}
</script>
<style lang='scss' scoped>
.data-sheet-main__nav {
    width: 180px;
    position: absolute;
    top: 0px;
    left: -190px;
    z-index: 100;
    background: #fff;
    border: 1px solid #6579fe;
    padding-top: 10px;
    .sjk_active {
        color: $theme !important;
    }
    .nav__item {
        position: relative;
        margin-bottom: 15px;

        .item_name {
            width: 100%;
            display: inline-block;
            padding-left: 17px;
            font-size: 14px;
            line-height: 24px;
            color: rgba(0, 0, 0, 0.85);
            /deep/.el-collapse-item__header {
                font-weight: bold;
                border-bottom: none;
                position: relative;
                padding-left: 15px;
                .el-collapse-item__arrow {
                    position: absolute;
                    left: 0;
                    transform: rotate(270deg);
                }
                .el-collapse-item__arrow.is-active {
                    transform: rotate(90deg);
                }
            }

            &:hover {
                cursor: pointer;
            }
        }
        .no-data {
            text-align: center;
            color: #999;
            padding: 10px 0;
            width: 100%;
        }
        img {
            width: 100%;
            height: 50px;
        }
        .nav__item--total {
            position: absolute;
            display: block;
            width: 30px;
            height: 30px;
            background: #fff;
            border: 1px solid #ccc;
            border-radius: 50%;
            line-height: 30px;
            border: 1px solid #71b1ec;
            box-shadow: 0 3px 6px #156d90;
            text-align: center;
            color: #fd0b0b;
            font-size: 16px; /*no*/
            top: 0;
            right: 0;
            transform: translate(25%, -20%);
        }
        .nav__item__list {
            display: flex;
            max-height: 246px;
            overflow-y: auto;
            flex-wrap: wrap;

            .list__li {
                width: 100%;
                margin-top: 5px;
                line-height: 30px;
                padding: 0 6px 0 17px;
                position: relative;
                cursor: pointer;
                color: #333;
                &:hover {
                    color: $blue;
                }
                .list--title {
                    width: 90px;
                    overflow: hidden;
                    text-overflow: ellipsis;
                    white-space: nowrap;
                    float: left;
                    &:hover {
                        color: #409eff;
                    }
                }
                .list--count {
                    color: #46a0fc;
                    float: right;
                }
            }
            .list__li--active {
                color: $blue;
            }
        }
    }
    /deep/.el-collapse {
        border-top: none;
    }
}
.data-sheet-main__list {
    flex: 1;
    margin-left: 20px;
    .list-header {
        flex-direction: column;

        .order {
            text-align: right;
            a {
                background: #6579fe;
                font-family: PingFangSC-Regular;
                font-size: 12px;
                line-height: 22px;
                color: #ffffff;
                padding: 6px;
                border-radius: 4px;
            }
        }
    }
    .handler--fixed-right {
        padding: 25px 10px;
    }
    .nodata {
        text-align: center;
        font-size: 16px;
    }
}
</style>

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