function(e){e.something…} What is e?

Question

When I write

$(\"#new_lang\").click(function(e) 
{
  alert(\"something\");
  e.stopPropagation();
});

What is e here, and

Answer 1

e, in this context, is the event object raised by the click event. It will work perfectly well without it (albeit, in your example you will be unable to stopPropagation):

$("#new_lang").click(function() 
{
  alert("something");
});

You can also substitute any name for e, as you would with any function param

$("#new_lang").click(function(eventObj) 
{
  alert("something");
  eventObj.stopPropagation();
});