Fix for client side 'required' validator which allowed whitespace to …

…be submitted in input value. This library is now works the same way as jQuery Unobtrusive validation on which it is based.

Closes #109

src/index.ts

@@ -153,8 +153,9 @@ export class MvcValidationProviders {
 
             return false;
         }
-        // Default behavior otherwise.
-        return Boolean(value);
+
+        // Default behavior otherwise (trim ensures whitespace only is not seen as valid).
+        return Boolean(value?.trim());
     }
 
     /**