mootool keep event alive for behavior

[hongclub]

Hi,

I have a span element on my page ... test,

i need to addEvent to pay attention this element, so in my mootool js is kind of like this
var mytest = $('test')
test.addEvent('click', function (e, el) {
.... do something
};

whenever i click the , it will do something ...
on my html ... sometimes i need to toggle to remove that and show that

As what i know ... once i remove that , the event tracking is gone ... i think that's the purpose to avoid memory leak, correct?

But in my case, i kind of need to keep that event tracking even though the is gone ... any suggestion? any options in the mootool addEvent to keep it alive?

hongclub

[anutron]

First, I'm not sure what this has to do with Behavior. None of the code in the above example is using it, so I'm not sure if it even applies. This appears to be a generic MooTools question.

From what I can tell (your description is a little unclear), you have an element on which you have attached an event. Sometimes this element is hidden. You are concerned about having this event listener attached to this element while it is hidden.

In such a case, you needn't worry. You don't need to do any manual garbage collection on events attached with MooTools - this collection is done when you destroy the element or reload the page. If you are showing and hiding it, you needn't remove the event listener; doing so would not improve the performance of your app (indeed, it would slow it down minutely, as each time you showed or hid the element, you must invoke a method on it).

If you destroy the element, MooTools will clean up this event for you. If you unload the page (i.e. navigate away or hit refresh) MooTools will clean up this event then, too.

None of this has anything to do with Behavior, whose filters do provide a mechanism for manual garbage collection. This is useful if you have, for example, a timeout or a periodical running, or attached event listeners from instance of a class upon another, etc.

[anutron]

closing this for the time being unless you can provide clearer instruction as to the nature of the issue and its relation to Behavior.

[hongclub]

sorry for the unclear information.

basically this junk of code is inside a Behavior i created:
....
var mytest = $('test')
test.addEvent('click', function (e, el) {
.... do something
};

On my page .... it initializes this behavior ... that will pay attention to the $('test') span ...
In my development (long story) ... the will be removed completely and show again by my javascript (not even simply adding hidden as hide() and show())
I noticed that once the is removed, i think the event listened to this is also got destroyed ... when i show the the event is not longer there attached it ...

My question is:
how can i bring back the event attached to my , or not destroyed it when i removed ?
any options is can set in either Behavior or addEvent?

Please advise,
hongclub

[anutron]

This isn't related to Behavior, I think. I encourage you to go post this question on the MooTools Users List. I'll answer it there if others do not. I strongly encourage you to create a jsfiddle when you file the issue.

The short answers based on your response above:

1. you should be using delegator for adding events, though that's not a hard rule.
2. your example isn't using behavior, which requires you to create a named filter and an element must declare that filter. further filters don't use $() if properly written, as they are handed the elements that name them.
3. if you are calling .hide and .show nothing, including behavior, is removing your events, so something else is going on. this is why a jsfiddle would be useful.

[hongclub]

anutron, thanks for your response ... definitely gave me a better idea.