In jQuery documentation , we have the explanation of event.namespace .
This allows you to use a jQuery specific event (or create a specific event)
with a namespace, through a . point and a name in front of that event.
Example:
$(document).on('click.first_event', function (event)
{
alert(event.namespace);
});
I would like to know what is the advantage of using events with these namespaces in jQuery?
What is the purpose of these namespaces ?
A event.namespace can be useful for tracking which specific events I want to remove.
Example:
Suppose I have three events of scroll linked to window .
I want to remove one of them specifically, but not all of them.
If I did so:
$(window).scroll(function (){
alert('1');
}
$(window).scroll(function (){
alert('1');
}
$(window).off('scroll');
I would remove all events.
But if I did, I would succeed, thanks to event.namespace .
$(window).bind('scroll.alert_1', function ()
{
alert('1');
});
$(window).bind('scroll.alert_1', function ()
{
alert('2');
});
$(window).unbind('scroll.alert_1');
In the above case, only alert('2') will be displayed, since I was able to remove a specific event on account of this namespace .