Remove spaces at both ends of the JavaScript string, and press Enter.

Many languages have specialized functions or methods to delete spaces at the beginning and end of a string, such as chomp of Perl and strip of Python. Then JavaScript does not seem to have similar functions, which are not mentioned in some manuals. In fact, the trim function has been added to JavaScript 1.8.1 to implement this function. Most browsers also provide support. The following provides a simple implementation.

Method to add a String object:

1. If (typeof (String. prototype. trim) = "undefined ")
   
2. {
   
3. String. prototype. trim = function ()
   
4. {
   
5. Return String (this). replace (/^ \ s + | \ s + $/g ,'');
   
6. };
   
7. }
   
8. 
   
9. 
   
10. "Dog". trim () = "dog"