jQuery implements adding data to the first row of the list

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jQuery implements adding data to the first row of the list_jquery

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May 16, 2016 pm 03:58 PM

jquery

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>

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

The above is the entire content of this article, I hope you all like it.

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