需求描述
element-ui的 el-autocomplete 组件支持远程搜索输入建议，不过不能翻页，只能搜索到首页内容
要求实现下滑到底部的时候，触发翻页请求，查看更多结果
文档
Input 输入框 https://element.eleme.io/#/zh-CN/component/input
实现效果
实现思路
想办法监听到滚动事件，就能判断是否到达底部，然后进行page++ 搜索
通过自定义指令v-autocomplete-scroll 来监听滚动事件，需要注意事件的监听与移除监听
实现代码
<template> <el-autocomplete popper-class="mo-autocomplete" v-model="keyword" style="width: 300px" :fetch-suggestions="querySearch" :debounce="800" ref="autocomplete" v-autocomplete-scroll="handleScroll" placeholder="搜索" @blur="handleBlur" > </el-autocomplete> </template> <script> import apiData from './data.json' export default { name: '', props: {}, computed: {}, data() { return { page: 1, size: 20, keyword: '', } }, directives: { 'autocomplete-scroll': { bind(el, binding, vnode) { console.log('bind') // 此处为了简单，直接判断触底了 function handleScroll(e) { let isBottom = e.target.clientHeight + e.target.scrollTop == e.target.scrollHeight if (isBottom && !vnode.context.loading) { binding.value() } } // 监听滚动 let wrapDom = el.querySelector('.el-autocomplete-suggestion__wrap') el.__handleScroll__ = handleScroll el.__wrapDom__ = wrapDom wrapDom.addEventListener('scroll', handleScroll, false) }, unbind(el, binding, vnode) { console.log('unbind') // 解除事件监听 el.__wrapDom__.removeEventListener('scroll', el.__handleScroll__, false) }, }, }, methods: { // 分页搜索 async search(keywords) { console.log('page', this.page) let start = (this.page - 1) * this.size let end = start + this.size return apiData.slice(start, end) }, // 焦点触发搜索第一页 async querySearch(queryString, cb) { this.page = 1 let list = await this.search(queryString) // 调用 callback 返回建议列表的数据 cb(list) }, // 滚动触发翻页 async handleScroll() { console.log('handleScroll') // 限制翻页限度 if (this.page > 20) { return } this.page++ let list = await this.search(this.keywords) this.$refs['autocomplete'].$data.suggestions.push(...list) }, handleBlur() { console.log('handleBlur') // 避免上次数据影响 this.$refs['autocomplete'].$data.suggestions.splice( 0, this.$refs['autocomplete'].$data.suggestions.length ) }, }, created() {}, } </script> <style lang="less"></style>
测试数据 data.json
[ { "value": "三全鲜食（北新泾店）", "address": "长宁区新渔路144号" }, { "value": "Hot honey 首尔炸鸡（仙霞路）", "address": "上海市长宁区淞虹路661号" }, { "value": "新旺角茶餐厅", "address": "上海市普陀区真北路988号创邑金沙谷6号楼113" }, { "value": "泷千家(天山西路店)", "address": "天山西路438号" }, { "value": "胖仙女纸杯蛋糕（上海凌空店）", "address": "上海市长宁区金钟路968号1幢18号楼一层商铺18-101" }, { "value": "贡茶", "address": "上海市长宁区金钟路633号" }, { "value": "豪大大香鸡排超级奶爸", "address": "上海市嘉定区曹安公路曹安路1685号" }, { "value": "茶芝兰（奶茶，手抓饼）", "address": "上海市普陀区同普路1435号" }, { "value": "十二泷町", "address": "上海市北翟路1444弄81号B幢-107" }, { "value": "星移浓缩咖啡", "address": "上海市嘉定区新郁路817号" }, { "value": "阿姨奶茶/豪大大", "address": "嘉定区曹安路1611号" }, { "value": "新麦甜四季甜品炸鸡", "address": "嘉定区曹安公路2383弄55号" }, { "value": "Monica摩托主题咖啡店", "address": "嘉定区江桥镇曹安公路2409号1F，2383弄62号1F" }, { "value": "浮生若茶（凌空soho店）", "address": "上海长宁区金钟路968号9号楼地下一层" }, { "value": "NONO JUICE 鲜榨果汁", "address": "上海市长宁区天山西路119号" }, { "value": "CoCo都可(北新泾店）", "address": "上海市长宁区仙霞西路" }, { "value": "快乐柠檬（神州智慧店）", "address": "上海市长宁区天山西路567号1层R117号店铺" }, { "value": "Merci Paul cafe", "address": "上海市普陀区光复西路丹巴路28弄6号楼819" }, { "value": "猫山王（西郊百联店）", "address": "上海市长宁区仙霞西路88号第一层G05-F01-1-306" }, { "value": "枪会山", "address": "上海市普陀区棕榈路" }, { "value": "纵食", "address": "元丰天山花园(东门) 双流路267号" }, { "value": "钱记", "address": "上海市长宁区天山西路" }, { "value": "壹杯加", "address": "上海市长宁区通协路" }, { "value": "唦哇嘀咖", "address": "上海市长宁区新泾镇金钟路999号2幢（B幢）第01层第1-02A单元" }, { "value": "爱茜茜里(西郊百联)", "address": "长宁区仙霞西路88号1305室" }, { "value": "爱茜茜里(近铁广场)", "address": "上海市普陀区真北路818号近铁城市广场北区地下二楼N-B2-O2-C商铺" }, { "value": "鲜果榨汁（金沙江路和美广店）", "address": "普陀区金沙江路2239号金沙和美广场B1-10-6" }, { "value": "开心丽果（缤谷店）", "address": "上海市长宁区威宁路天山路341号" }, { "value": "超级鸡车（丰庄路店）", "address": "上海市嘉定区丰庄路240号" }, { "value": "妙生活果园（北新泾店）", "address": "长宁区新渔路144号" }, { "value": "香宜度麻辣香锅", "address": "长宁区淞虹路148号" }, { "value": "凡仔汉堡（老真北路店）", "address": "上海市普陀区老真北路160号" }, { "value": "港式小铺", "address": "上海市长宁区金钟路968号15楼15-105室" }, { "value": "蜀香源麻辣香锅（剑河路店）", "address": "剑河路443-1" }, { "value": "北京饺子馆", "address": "长宁区北新泾街道天山西路490-1号" }, { "value": "饭典*新简餐（凌空SOHO店）", "address": "上海市长宁区金钟路968号9号楼地下一层9-83室" }, { "value": "焦耳·川式快餐（金钟路店）", "address": "上海市金钟路633号地下一层甲部" }, { "value": "动力鸡车", "address": "长宁区仙霞西路299弄3号101B" }, { "value": "浏阳蒸菜", "address": "天山西路430号" }, { "value": "四海游龙（天山西路店）", "address": "上海市长宁区天山西路" }, { "value": "樱花食堂（凌空店）", "address": "上海市长宁区金钟路968号15楼15-105室" }, { "value": "壹分米客家传统调制米粉(天山店)", "address": "天山西路428号" }, { "value": "福荣祥烧腊（平溪路店）", "address": "上海市长宁区协和路福泉路255弄57-73号" }, { "value": "速记黄焖鸡米饭", "address": "上海市长宁区北新泾街道金钟路180号1层01号摊位" }, { "value": "红辣椒麻辣烫", "address": "上海市长宁区天山西路492号" }, { "value": "(小杨生煎)西郊百联餐厅", "address": "长宁区仙霞西路88号百联2楼" }, { "value": "阳阳麻辣烫", "address": "天山西路389号" }, { "value": "南拳妈妈龙虾盖浇饭", "address": "普陀区金沙江路1699号鑫乐惠美食广场A13" } ]
