vue2 增加左侧目录搜索功能

1：效果图如下

不多说上代码

2：引入方式 （fuse更多使用功能可以百度搜索）

方式一：cdn方式引入 fuse.js 轻量级模糊搜索，在html页面里面引入，引入后记得重启，不然不生效
https://cdn.bootcdn.net/ajax/libs/fuse.js/7.0.0/fuse.basic.min.js

方式二：也可以不用cdn方式，npm install fuse.js，需要在子组件里面加上这个 import Fuse from 'fuse.js'

3：可以把这个封装成一个组件使用  

父：

<headerSearch id="header-search" class="right-menu-item" />

import headerSearch from "./headerSearch";

components：{headerSearch}

子：就是下面代码 （cdn方式）

<template>
    <div :class="{'show':show}" class="header-search">
      <svg-icon class-name="search-icon" icon-class="search" @click.stop="click" />
      <el-select
        ref="headerSearchSelect"
        v-model="search"
        :remote-method="querySearch"
        filterable
        default-first-option
        remote
        placeholder="请输入要搜索的左侧目录"
        class="header-search-select"
        @change="change"
      >
        <el-option v-for="item,index in options" :key="index" :value="item.item.urlLabel" :label="item.item.name.join(' > ')" />
      </el-select>
    </div>
  </template>
  
  <script>
  // fuse is a lightweight fuzzy-search module
  // make search results more in line with expectations
    //import Fuse from 'fuse.js'
  import path from 'path'
  
  export default {
    name: 'HeaderSearch',
    data() {
      return {
        search: '',
        options: [],
        searchPool: [],
        show: false,
        fuse: undefined
      }
    },
    computed: {
      routes() {
        return this.$store.getters.navList
      }
    },
    watch: {
      routes() {
        this.searchPool = this.generateRoutes(this.routes)
      },
      searchPool(list) {
        this.initFuse(list)
      },
      show(value) {
        if (value) {
          document.body.addEventListener('click', this.close)
        } else {
          document.body.removeEventListener('click', this.close)
        }
      }
    },
    mounted() {
      this.searchPool = this.generateRoutes(this.routes)
    },
    methods: {
      click() {
        this.show = !this.show
        if (this.show) {
          this.$refs.headerSearchSelect && this.$refs.headerSearchSelect.focus()
        }
      },
      close() {
        this.$refs.headerSearchSelect && this.$refs.headerSearchSelect.blur()
        this.options = []
        this.show = false
      },
      change(val) {
        this.$router.push(val)
        this.search = ''
        this.options = []
        this.$nextTick(() => {
          this.show = false
        })
      },
      initFuse(list) {
        this.fuse = new Fuse(list, {
          shouldSort: true,
          threshold: 0.4,
          location: 0,
          distance: 100,
          maxPatternLength: 32,
          minMatchCharLength: 1,
          keys: [{
            name: 'name',
            weight: 0.7
          }, {
            name: 'urlLabel',
            weight: 0.3
          }]
        })
      },
      // Filter out the routes that can be displayed in the sidebar
      // And generate the internationalized title
      generateRoutes(routes, basePath = '/', prefixTitle = []) {
        let res = []
  
        for (const router of routes) {
          // skip hidden router
          if (router.hidden) { continue }
          // console.log(router)
          const data = {
            urlLabel: path.resolve(basePath, router.urlLabel),
            name: [...prefixTitle]
          }
  
          if (router && router.name) {
            data.name = [...data.name, router.name]
  
            // if (router.redirect !== 'noRedirect') {
              // only push the routes with title
              // special case: need to exclude parent router without redirect
              res.push(data)
            // }
          }
  
          // recursive child routes
          if (router.children) {
            const tempRoutes = this.generateRoutes(router.children, data.urlLabel, data.name)
            if (tempRoutes.length >= 1) {
              res = [...res, ...tempRoutes]
            }
          }
        }
        
        return res
      },
      querySearch(query) {
        if (query !== '') {
          this.options = this.fuse.search(query)
        } else {
          this.options = []
        }
        // console.log(this.options)
      }
    }
  }
  </script>
  
  <style lang="scss" scoped>
  .header-search {
    font-size: 0 !important;
  
    .search-icon {
      cursor: pointer;
      font-size: 18px;
      vertical-align: middle;
    }
  
    .header-search-select {
      font-size: 18px;
      transition: width 0.2s;
      width: 0;
      overflow: hidden;
      background: transparent;
      border-radius: 0;
      display: inline-block;
      vertical-align: middle;
  
      ::v-deep .el-input__inner {
        border-radius: 0;
        border: 0;
        padding-left: 0;
        padding-right: 0;
        box-shadow: none !important;
        border-bottom: 1px solid #d9d9d9;
        vertical-align: middle;
      }
    }
  
    &.show {
      .header-search-select {
        width: 210px;
        margin-left: 10px;
      }
    }
  }
  </style>
  

5：数据结构

        routes() {

        return this.$store.getters.navList

      }

navList对应的数据结构是这样的

有其他问题可以评论联系，*★,°*:.☆(￣▽￣)/$:*.°★* 。