JQuery 控制内容长度超出规定长度显示省略号

长度超出规定长度，显示省略号

设置class为displayPart，

设置自定义属，displayLength可显示长度（不包含...），双字节字符，长度 *2，

<script type="text/javascript"> 
$.fn.extend({ 
displayPart:function () { 
var displayLength = 100; 
displayLength = this.attr("displayLength") || displayLength; 
var text = this.text(); 
if (!text) return ""; 

var result = ""; 
var count = 0; 
for (var i = 0; i < displayLength; i++) { 
var _char = text.charAt(i); 
if (count >= displayLength) break; 
if (/[^x00-xff]/.test(_char)) count++; //双字节字符，//[u4e00-u9fa5]中文 

result += _char; 
count++; 
} 
if (result.length < text.length) { 
result += "..."; 
} 
this.text(result); 
} 
}); 

$(function () { 
$(".displayPart").displayPart(); 
}); 

</script> 

复制代码代码如下:

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> 
<html> 
<head> 
<title> New Document </title> 
<meta name="Generator" content="EditPlus"> 
<meta name="Author" content=""> 
<meta name="Keywords" content=""> 
<meta name="Description" content=""> 
<script type="text/javascript" src="http://code.jquery.com/jquery-1.9.1.min.js"></script> 
</head> 

<body> 
<h2>hello world</h2> 

<div style="width:500px;"> 
hello worldhello worldhello worldhello worldhello worldhello worldhello worldhello worldhello worldhello worldhello worldhello world!!! 
</div> 
<hr> 
<h2>hello</h2> 
<div class="displayPart" displayLength="40"> hello worldhello worldhello worldhello worldhello worldhello worldhello worldhello worldhelloworldhello worldhello worldhello worldhello worldhello worldhello world 
</div> 
</body> 
</html> 