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Detailed explanation of Html5 datalist tag and dynamic matching with background data
- Y2JOriginal
- 2017-05-22 10:15:492906browse
HTML5’s new tag datalist enables automatic entry into the database fuzzy query when entering the first letter of Chinese/Pinyin, and returns the corresponding results to generate a datalist. When the input content in the input box changes, the datalist will automatically trigger the drop-down. Frame, the solution is very good. Let me share the example code with you through this article. Friends who need it can refer to it
The recent project involves a small function. When customers choose suppliers, due to the large number of suppliers, There are many (about 3,000), so it is obviously unrealistic to directly generate drop-down boxes, so I changed the solution and planned to use the new tag datalist in HTML5 to automatically enter the database fuzzy query when entering the first letter of Chinese/Pinyin and return the corresponding As a result, a datalist is generated. Since the datalist will automatically trigger the drop-down box when the input content in the input box changes, it is more convenient to use than select. The front-end code is as follows:
Html Code:
<!DOCTYPE html>
<html lang="en">
<head id="head">
<title>库存下拉框测试</title>
<meta charset="utf-8">
<meta content="IE=edge,chrome=1" http-equiv="X-UA-Compatible">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta name="description" content="">
<meta name="author" content="">
<script src="../../Common/content/jquery-1.7.2.min.js"type="text/javascript"></script>
<script src="../../Common/pages/include.js" class="include" type="text/javascript"></script>
<script src="../../Common/js/AjaxJson.js" type="text/javascript"></script>
<script src="../../Common/js/Setting.js" type="text/javascript"></script>
<script src="../../Common/js/Paging.js" type="text/javascript"></script>
<script src="../../Js/warehouseManage/testyy.js" type="text/javascript"></script>
</head>
<body class="">
<!--<![endif]-->
<p class="navbar"></p>
<p class="sidebar-nav"></p>
<p class="content">
<p class="header"><h1 id="ADU" class="page-title">下拉框测试</h1></p>
<p class="container-fluid">
<p class="row-fluid">
<!-- --------------------------多条件查询--------------------------------------------- -->
<p class="well" id="searchDemo">
<p>测试数据(默认均为d00001)：<br> 昆山市大陆配件有限公司 ksdlpjyxgs <br>
亿真企业有限公司 yzqyyxgs <br>
泰州市安誊轴皮厂（集团厂） tzsatzpc(jtc)
</p>
</p>
按 供应商名动态匹配（中文或者拼音均可）：
<input list="bro" id="name" oninput="this.value=this.value.replace(/^ +| +$/g,'');search('name','bro','name')" >
<datalist id="bro"></datalist>
</p>
</p>
</p>
</body>
<!-- -----------------------footer-------------------------- -->
<footer class="foot"></footer>
</html>JavaScript Code:
var listobj=null; //datalist对象
var requestItem=null; //后台返回的json数据中所需的key值
var inputContent=null; //input标签对象
/**search（）说明：
* inputID： input标签的ID
* datalistID： datalist标签的ID
* itemName： 后台返回的json数据中所需的key值（仅需表格中中文字段的属性名）
* */
function search(inputID,datalistID,itemName)
{
inputContent=document.getElementById(inputID);
var datalist=document.getElementById(datalistID);
//防止在无输入内容的情况下产生遗留下拉选项
if(inputContent.value.length==0||inputContent.value==" ")
{
var sub=datalist.childNodes;
if(sub.length>0)
{
for (var i =sub.length-1; i>=0 ; i--)
{
datalist.removeChild(sub[i]);
}
}
listobj=null;
requestItem=null;
inputContent.value=null;
return false;
}
//全局变量赋值
listobj=datalist;
requestItem=itemName;
var data="";
var url="";
if(/^[a-zA-Z]*$/.test(inputContent.value))
{
//检测出是拼音首字母
data="type=searchWords¶m="+inputContent.value; //注意：data-----------需要自定义
url=baseurl + "/servlet/ListDemo"; //注意：url-----------需要自定义
sendRequest("post",url,data,getResult);
}
else if (/^[\u4e00-\u9fa5]*$/.test(inputContent.value))
{
//检测出是中文
data="type=searchChinese¶m="+inputContent.value; //注意：data-----------需要自定义
url=baseurl + "/servlet/ListDemo"; //注意：url-----------需要自定义
sendRequest("post",url,data,getResult);
}
}
//填写仓库下拉框
function getResult(result)
{
var data=result;
var JData=eval("(" + data + ")");
var maxlength=10; //注释：maxlength保证过多查询结果下只显示10条
if(JData.length<=10)
{
maxlength=JData.length;
}
var sub=listobj.childNodes;
for (var i =sub.length-1; i>=0 ; i--)
{
listobj.removeChild(sub[i]); //清空datalist所有的下拉选项
}
if(JData.length==0) //没有查询结果
{
alert("没有符合条件的结果，请重输");
inputContent.value=""; //清空input输入框的值
return false;
}
for (var i=0;i<maxlength;i++)
{
var obj=document.createElement("option");
var indexobj=JData[i];
if(/^[a-zA-Z]*$/.test(inputContent.value))
{
obj.value=indexobj[requestItem];
obj.innerHTML=inputContent.value;
}
if (/^[\u4e00-\u9fa5]*$/.test(inputContent.value))
{
obj.value=indexobj[requestItem];
}
listobj.appendChild(obj);
}
var suffix=document.createElement("option");
suffix.value=" ";
suffix.innerHTML="输入更多有关"+inputContent.value+"的信息";
listobj.appendChild(suffix);
return false;
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