what does stoppropagation do code example

Example 1: event .stoppropagation

event.stopPropagation();

Example 2: stop propagation event

$("span").click(function(event){
  event.stopPropagation();
  alert("The span element was clicked.");
});
$("p").click(function(event){
  alert("The p element was clicked.");
});
$("div").click(function(){
  alert("The div element was clicked.");
});

Example 3: js propagation stop

	oi


func(e?)
{
	if(e) e.stopPropagation();
}