String trim() Method

The trim() method removes all leading and trailing white space:

 
<!DOCTYPE html>
<html>
<head>
    <title>Example</title>
    <script type="text/javascript">
    
        var stringValue = " hello world "; 
        var trimmedStringValue = stringValue.trim(); 
        document.writeln(stringValue); //" hello world " 
        document.writeln(trimmedStringValue); //"hello world" 

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

Click to view the demo

The original string remains intact.