[jQuery] Can you help me understand .end() ?
Please reference http://docs.jquery.com/How_jQuery_Works, the
Chainability segment.
I'm confused on the given description of .end():
You can take this even further, by adding or removing elements from
the selection, modifying those elements and then reverting to the old
selection, for example:
$("a")
.filter(".clickme")
.click(function(){
alert("You are now leaving the site.");
})
.end()
<a href="http://google.com/" class="clickme">I give a message when you
leave</a>
Methods that modify the jQuery selection and can be undone with end(),
are the following:
add(),
children(),
eq(),
filter(),
find(),
next(),
not(),
parent(),
parents(),
siblings() and
slice().
What does reverting and undone mean here? When I run the code, the
link click event runs the alert, I hit Ok, and it passes me to
Google. So the words reverting and undone confuse me, as I would take
this to mean the modified click event would be "undone" and never
executed. So what does .end() really do? A friend thinks it could
be a chain terminator, though he never uses it. Is it just a cleanup
thing part of good practice and not technically needed?
Thanks for educating a real jQuery beginner.