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js implements search box keyword intelligent matching code_javascript skills
js implements search box keyword intelligent matching code_javascript skills
Friends who use search engines should have this experience, that is, when entering keywords in the search box, there will be a self-matching phenomenon. This is definitely a very good user experience. Here is a similar code, Of course, this is just a cover-up, so the data that can only be matched are locally fixed. In actual applications, the data can only be read from the database.
Rendering:
Code examples are as follows:
<!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>I hope this article will be helpful to everyone learning JavaScript programming.
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