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jquery截取字符串的实现_jquery

时间：2021-07-01 10:21:17 帮助过：4人阅读

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 
<html xmlns="http://www.w3.org/1999/xhtml"> 
<head> 
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" /> 
<title>cookie</title> 
<script src="http://img.jb51.net/jslib/jquery/jquery-1.3.2.min.js" type="text/javascript"></ script> 
<style> 
*{ margin:0; padding:0;font-family:"宋体",Arial, Helvetica, sans-serif;} 
#best{ width:300px; height:200px; border:1px solid #ccc; margin:60px auto 0; line-height:1.6; font-size:14px; padding:10px 0 0 10px} 
.blank{ font-size:18px; font-weight:bold; text-align:center; padding:20px} 
</style> 
<script type="text/javascript"> 
jQuery.fn.limit=function(){ 
    var self = $("div[limit]"); 
    self.each(function(){ 
        var objString = $(this).text(); 
        var objLength = $(this).text().length; 
        var num = $(this).attr("limit"); 
        if(objLength > num){ 
$(this).attr("title",objString); 
            objString = $(this).text(objString.substring(0,num) + "..."); 
        } 
    }) 
} 
$(function(){ 
    $(document.body).limit(); 
}) 
</ script> 
</head> 
<body> 
    <div class="blank">请按F5刷新页面。。。。</div> 
<div id="best"> 
    <div limit="12">计算字串的长度长度长度长度</div> 
    <div limit="10">这边有优化很公开这边</div> 
    <div limit="12">这边有优化很公开长度长度很公开长度</div> 
    <div limit="12">计算字长度长度</div> 
    <div limit="10">这边有优化很边有优化很边有优化很边有优化很边有优化很</div> 
</div> 
</body> 
</html>

[Ctrl+A 全选注:如需引入外部Js需刷新才能执行]

下面是对一些数字进行格式化
我们想改变这么一段代码中间td之间的文本

实现显示为：

1.00

2.00

3.00

4.00

5.00

实现的函数为：
$('#generated_rows td.row_class').each(function() {
var x = Number($(this).text()).toFixed(2);
$(this).text(x);
});
演示代码

<!DOCTYPE html PUBLIC '-//W3C//DTD XHTML 1.0 Transitional//EN' 'http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd'> 
<html xmlns='http://www.w3.org/1999/xhtml'> 
<head> 
<meta http-equiv='Content-Type' content='text/html; charset=gb2312' /> 
<title>需要F5刷新一下</title> 
<script src='http://img.jb51.net/jslib/jquery/jquery-1.3.2.min.js' type='text/javascript'></ script> 
<style> 
*{ margin:0; padding:0;font-family:'宋体',Arial, Helvetica, sans-serif;} 
#best{ width:300px; height:200px; border:1px solid #ccc; margin:60px auto 0; line-height:1.6; font-size:14px; padding:10px 0 0 10px} 
.blank{ font-size:18px; font-weight:bold; text-align:center; padding:20px} 
</style> 
</head> 
<body> 
需要F5刷新一下 
<table> 
<tr id='generated_rows'> 
<td class='row_class' id='row_id_1'>1</td> 
<td class='row_class' id='row_id_2'>2</td> 
<td class='row_class' id='row_id_3'>3</td> 
<td class='row_class' id='row_id_4'>4</td> 
<td class='row_class' id='row_id_5'>5</td> 
</tr> 
</table> 
<script type="text/javascript"> 
$('#generated_rows td.row_class').each(function() { 
var x = Number($(this).text()).toFixed(2); 
$(this).text(x); 
}); 
</ script> 
</body> 
</html>

[Ctrl+A 全选注:如需引入外部Js需刷新才能执行]

jquery截取字符串的实现_jquery

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