js实现搜索框关键字智能匹配代码
只要使用搜索引擎的朋友应该都有这样的体会,就是当在搜索框输入关键字的时候,会出现自能匹配现象,这绝对是非常好的用户体验,下面就是一段类似的代码,当然这里只是掩饰,所以只能匹配的数据都是本地固定好的,在实际应用中可以才能够数据库读取数据。
效果图:
代码实例如下:
<!DOCTYPE html> <html> <head> <meta charset=" utf-8"> <meta name="author" content="http://www.softwhy.com/" /> <title>搜索框关键字智能匹配实例代码</title> <style> body, ul, li { margin:0; padding:0; } body { font-size:12px; font-family:sumsun, arial; background:#FFFFFF; } .gover_search { position:relative; z-index:99; height:63px; padding:15px 0 0 20px; border:1px solid #b8cfe6; border-bottom:0; background:url(../images/gover_search_bg.gif) repeat-x 0 0; } .gover_search_form {height:36px;} .gover_search .search_t { float:left; width:112px; line-height:26px; color:#666; } .gover_search .input_search_key { float:left; width:462px; height:18px; padding:3px; margin-right:5px; border:1px solid #ccc; line-height:18px; background:#fff; } .gover_search .search_btn { float:left; width:68px; height:26px; overflow:hidden; border:1px solid #ccc; text-align:center; color:#ff3300; letter-spacing:5px; background:url(../images/gover_search_bg.gif) no-repeat 0 -79px; cursor:pointer; font-weight:bold; } .gover_search .search_suggest { position:absolute; z-index:999; left:132px; top:41px; width:468px; border:1px solid #ccc; border-top:none; display:none; color:#004080; } .gover_search .search_suggest li { height:24px; overflow:hidden; padding-left:3px; line-height:24px; background:#fff; cursor:default; } .gover_search .search_suggest li.hover {background:#ddd;} .num_right { float:right; text-align:right; line-height:24px; padding-right:10px } </style> </head> <body> <div class="gover_search"> <div class="gover_search_form clearfix"> <span class="search_t">关键词匹配搜索</span> <input type="text" class="input_search_key" id="gover_search_key" placeholder="请输入关键词直接搜索" /> <button type="submit" class="search_btn">搜索</button> <div class="search_suggest" id="gov_search_suggest"> <ul> </ul> </div> </div> </div> <script type="text/javascript" src="http://www.softwhy.com/mytest/jQuery/jquery-1.8.3.js"></script> <script type="text/javascript"> function oSearchSuggest(searchFuc) { var input = $('#gover_search_key'); var suggestWrap = $('#gov_search_suggest'); var key = ""; var init = function(){ input.bind('keyup',sendKeyWord); input.bind('blur',function(){setTimeout(hideSuggest,100);}) } var hideSuggest = function(){ suggestWrap.hide(); } //发送请求,根据关键字到后台查询 var sendKeyWord = function(event){ //键盘选择下拉项 if(suggestWrap.css('display')=='block'&&event.keyCode == 38||event.keyCode == 40) { var current = suggestWrap.find('li.hover'); if(event.keyCode == 38) { if(current.length>0) { var prevLi = current.removeClass('hover').prev(); if(prevLi.length>0) { prevLi.addClass('hover'); input.val(prevLi.html()); } } else { var last = suggestWrap.find('li:last'); last.addClass('hover'); input.val(last.html()); } } else if(event.keyCode == 40) { if(current.length>0) { var nextLi = current.removeClass('hover').next(); if(nextLi.length>0) { nextLi.addClass('hover'); input.val(nextLi.html()); } } else { var first = suggestWrap.find('li:first'); first.addClass('hover'); input.val(first.html()); } } //输入字符 } else { var valText = $.trim(input.val()); if(valText ==''||valText==key) { return; } searchFuc(valText); key = valText; } } //请求返回后,执行数据展示 this.dataDisplay = function(data){ if(data.length<=0) { suggestWrap.hide(); return; } //往搜索框下拉建议显示栏中添加条目并显示 var li; var tmpFrag = document.createDocumentFragment(); suggestWrap.find('ul').html(''); for(var i=0; i<data.length; i++) { li = document.createElement('LI'); li.innerHTML = data[i]; tmpFrag.appendChild(li); } suggestWrap.find('ul').append(tmpFrag); suggestWrap.show(); //为下拉选项绑定鼠标事件 suggestWrap.find('li').hover(function(){ suggestWrap.find('li').removeClass('hover'); $(this).addClass('hover'); },function(){ $(this).removeClass('hover'); }).bind('click',function(){ $(this).find("span").remove(); input.val(this.innerHTML); suggestWrap.hide(); }); } init(); }; //实例化输入提示的JS,参数为进行查询操作时要调用的函数名 var searchSuggest = new oSearchSuggest(sendKeyWordToBack); //这是一个模似函数,实现向后台发送ajax查询请求,并返回一个查询结果数据,传递给前台的JS,再由前台JS来展示数据。本函数由程序员进行修改实现查询的请求 //参数为一个字符串,是搜索输入框中当前的内容 function sendKeyWordToBack(keyword){ var aData = []; aData.push('<span class="num_right">约100个</span>'+keyword+'返回数据1'); aData.push('<span class="num_right">约200个</span>'+keyword+'返回数据2'); aData.push('<span class="num_right">约100个</span>'+keyword+'返回数据3'); aData.push('<span class="num_right">约50000个</span>'+keyword+'返回数据4'); aData.push('<span class="num_right">约1044个</span>'+keyword+'2012是真的'); aData.push('<span class="num_right">约100个</span>'+keyword+'2012是假的'); aData.push('<span class="num_right">约100个</span>'+keyword+'2012是真的'); aData.push('<span class="num_right">约100个</span>'+keyword+'2012是假的'); //将返回的数据传递给实现搜索输入框的输入提示js类 searchSuggest.dataDisplay(aData); } </script> </body> </html>
更多关于搜索功能的文章请查看专题《JavaScript搜索功能汇总》
希望本文所述对大家学习javascript程序设计有所帮助。
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