Why are globals bad?

Question

It totaly makes sense to me to use it here. What would be the alternative? How can i generaly avoid to use them and most of all why is it bad according to jsLint to make us

Answer 1

you should define it with var $body, then it would be local in the scope of that function, without var it could be overwritten by everybody

(function($){
  $(function(){
   var $body = $('body'); //this is the local variable

   $.each(somearray ,function(){ $body.dosomething() });

   if (something){
     $body.somethingelse();
   }

  });
}(jQuery));