How to Remove Empty leading, trailing spaces using Angular JS

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jQuery

AngularJs

Hi All,

I have a text box, where I am using Angular JS.. and My code is

<input type="text"
name="XX"
class="username"
ng-model="XX"
ng-pattern ="/\s/"
ng-trim="false"
required placeholder="">

And at Span I used :

ng-show="$scope.UsernameInvalid">
User name entered is not a valid username or having leading, trailing spaces



Which is not working... so please suggest Me ASAP.

Thanks in Advance....