学习搜索带下拉功能的组件

<div class="col-xs-10" style="width:800px">  <label for="" class="label-control">全文检索</label>  <div class="hint-input-span-container">  <input type="text" name="hint-search" value="" placeholder="选定关键字或按下tab或按下enter来分割关键字"> </div>  <div class="hint-block">  <ul class="hint-ul"> </ul> </div> </div>

* { box-sizing: border-box; } .hint-input-span-container { width:100%; background-color: #fff; border: 1px solid #ccc; box-shadow: inset 0 1px 1px rgba(0, 0, 0, 0.075); display: inline-block; padding: 2px 4px; color: #555; vertical-align: middle; border-radius: 1px; max-width: 100%; line-height: 30px; } .hint-input-span-container .tag { padding: -2px; font-size: 12px; font-family: serif;; margin-right: 2px; margin-top: 2px; margin-bottom: 2px; display: inline-block; } .label { font-size: 10px; padding: 4px 6px; border: none; text-shadow: none; border-radius: 3px; font-weight: 200; } .label-primary { background: #2693FF; color: white; } .hint-input-span-container span i[data-role='remove'] { cursor: pointer; } .tag { margin-right: 2px; color: white; } .tag [data-role="remove"] { margin-left: 2px; cursor: pointer; } input[name='hint-search'] { border: none; box-shadow: none; outline: none; background-color: transparent; padding: 0; margin: 0; width: 100%; max-width: inherit; } .hint-block { position: absolute; width: 100px; max-height: 120px; background-color: #fff; overflow: auto; display: none; z-index: 9999; } .hint-ul { text-decoration: none; list-style-type: none; padding-left: 5px; } .hint-ul li{ font-size: 14px; padding: 2px 4px; } .hint-ul li:hover{ background-color: #eee; }

$(function(){ //json数据包 var data = {data:["123","北京你好","北京欢迎您","北京好","海洋","海洋广利局","我海洋","我吃惊","我啦啦啦啦","我不能忍","机构","日本","俄罗斯的山","埃塞俄比亚","伊巴卡","比比比"]}; //获取后面需要多次调用的dom对象 var $hintSearch = $("input[name='hint-search']"); var $hintSearchContainer = $(".hint-input-span-container"); var $hintBlock = $(".hint-block"); var $hintUl = $(".hint-ul"); //初次调用添加词典 addDictionary(data.data,addUlListener); //设置词典列表宽度 setHintSearchContainerWidth(); //实现响应式监听resize事件 $(window).bind('resize', setHintSearchContainerWidth); //获得焦点 $hintSearch.focus(function(){ animteDown(); }); //失去焦点 //设置延迟为了可以监听到click的响应 $hintSearch.blur(function(){ setTimeout(function(){ animateUp(); },200); }); //TAB 与 enter事件 //监听tab与enter两个键位如果input内有输入的内容，则添加span //注意最后要阻止一下事件冒泡防止跳转与切换焦点 $hintSearch.keydown(function(e){ switch (e.which) { case 9: case 13:{ var text = $hintSearch.val(); if(!$.trim(text)) { $hintSearch.val(""); e.preventDefault(); return; } if( !checkContainerHas(text) ) { $hintSearch.before('<span class="tag label label-primary">'+ text +' <i class="fa fa-times" data-role="remove"></i><i> </i></span>'); addSpanListenr(); } //console.log($hintSearch.val()); $hintSearch.val(""); $hintSearch.focus(); e.preventDefault(); break; } default: ; } }); //检测输入配对 //对输入内容在li中进行匹配如果包含字符串可以找到并返回 //搜索方法可以自行修改，只要保证返回一个搜索后的数组即可 $hintSearch.keyup(function(e){ var text = $hintSearch.val(); if (!$.trim(text)){ updateDictionary(data.data,addUlListener); } var tmparr = data.data.filter(function(x){ return x.indexOf(text) != -1; }) if (tmparr.length === 0) { tmparr.push("无匹配条目"); } updateDictionary(tmparr,addUlListener); }) //函数库 //添加用户常用字典库 function addDictionary(dataarr, callback) { for(var i = 0; i < dataarr.length; i++) { $hintUl.append('<li>'+ dataarr[i] +'</li>'); } callback(); } //更新搜索内容 function updateDictionary(dataarr,callback) { $hintUl.empty(); addDictionary(dataarr,callback); } //向下滑动动画 //封装改变样式边框 function animteDown() { $hintBlock.slideDown('fast').css({'border':'1px solid #96C8DA','border-top' : '0px', 'box-shadow' : '0 2px 3px 0 rgba(34,36,38,.15)'}); $hintSearchContainer.css({'border':'1px solid #96C8DA','border-bottom' : '0px', 'box-shadow' : '0 2px 3px 0 rgba(34,36,38,.15)'}); } //向上滑动动画 function animateUp() { $hintBlock.slideUp('fast',function(){ $hintSearchContainer.css({'border':'1px solid #ccc'}); }); } //检验是否与输入的重复 function checkContainerHas(text) { var flag = 0; $(".hint-input-span-container span").each(function(){ if ($.trim(text) == $.trim($(this).text())) { flag = 1; return; } }); return flag ? true : false; } //设置hint-input-span-container宽度 function setHintSearchContainerWidth() { var hint_width = $hintSearchContainer.width() + 2 * parseInt($hintSearchContainer.css('padding-left').match(/[0-9]+/)[0]) + 2 * parseInt($hintSearchContainer.css('border-left').match(/[0-9]+/)[0]) ; $hintBlock.css({'width': hint_width}); } //绑定click事件 function addUlListener() { $hintUl.delegate('li','click',function(){ var text = $(this).text(); if(!checkContainerHas(text)) { $hintSearch.before('<span class="tag label label-primary">'+ text +' <i class="fa fa-times" data-role="remove"></i><i> </i></span>'); addSpanListenr(); } $hintSearch.val(""); animateUp(); }) } //监听 span事件 function addSpanListenr() { $(".hint-input-span-container span").delegate("i",'click',function(){ $(this).parent().remove(); }) } })