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Solution to the problem that the javascript trim function cannot be used in IE_jquery

WBOY
WBOYOriginal
2016-05-16 16:36:31887browse

The trim function of JavaScript can be used under Firefox without any problem

<script language="javascript"> 
var test1 = " aa "; 
test1 = test1.toString(); 
test1 = test1.trim(); 
</script>

There is no problem when using this method under Firefox, but an error occurs under IE
Then we can modify it

String.prototype.trim=function(){return this.replace(/(^\s*)|(\s*$)/g,"");}

Add this sentence to the header, and the above can be run under both IE and FF

Methods provided by JQuery: 

<!DOCTYPE html> 
<html> 
<head> 
<script src="http://code.jquery.com/jquery-latest.js"></script> 
</head> 
<body> 
<button>Show Trim Example</button> 
<script> 

$("button").click(function () { 
var str = " lots of spaces before and after "; 
alert("'" + str + "'"); 

str = jQuery.trim(str); 
alert("'" + str + "' - no longer"); 
}); 

</script> 
</body> 
</html>
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