jQuery implements adding data to the first row of the list

jQuery implements adding data to the first row of the list_jquery

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Release： 2016-05-16 15:58:20

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In jQuery, you can add data at the end of the list through append, or you can add data at the front of the list through prepend

The method is very simple:

Copy code The code is as follows:

jQuery('#comment_list').prepend('hello www.jb51.net
');

Attached is also the jquery code to continuously add data to the textarea text field.

<%@ page language="java" contenttype="text/html; charset=gbk" pageencoding="gbk"%>
<%@ include file="/pages/common/taglibs.jsp"%>
<!doctype html public "-//w3c//dtd html 4.01 transitional//en" "http://www.w3.org/tr/html4/loose.dtd">
<html>
<head>
<script type="text/javascript" src="jquery-1.4.js"></script>
<script type="text/javascript">
  $(document).ready(function(){
    $("input[id^='buttonvalidate']").click(function(){ //当点击所有的id中包含'buttonvalidate'的input标签时，执行函数
     var btnval=$.trim($(this).val());//trim函数，去掉空格
     var str = $('#textareavalidate').val() + btnval;//
     $('#textareavalidate').val(str);//
    });
  });
</script>
<title>insert title here</title>
</head>
<body>
<form id="form1" name="form1" action="" method="post">
<table id ="table1" class="base_table" cellspacing="0" border="1" style="border-collapse: collapse">
 <tr>
 <td>
 <textarea cols="75" rows="5" id="textareavalidate"></textarea>
 </td>
 </tr>
 <tr id="tr1">
 <td>
 <input id="buttonvalidate1" type="button" value=" + "/> 
 <input id="buttonvalidate2" type="button" value=" - "/> 
 <input id="buttonvalidate3" type="button" value=" * "/>
 <input id="buttonvalidate4" type="button" value=" / "/>   
 <input id="buttonvalidate5" type="button" value=" ! "/>
 <input id="buttonvalidate6" type="button" value=" = "/>
 <input id="buttonvalidate7" type="button" value=" < "/>
 <input id="buttonvalidate8" type="button" value=" > "/>   
 <input id="buttonvalidate9" type="button" value=" & "/>
 <input id="buttonvalidate10" type="button" value=" | "/>
 <input id="buttonvalidate11" type="button" value=" ( "/>
 <input id="buttonvalidate12" type="button" value=" ) "/>
 </td>
 </tr>
</table>
</form>
</body>
</html>

Copy after login

The functions implemented above: click to add to the textarea, click - to add - to the textarea;

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