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Accessing div created dynamically with JS

Posted on 2014-01-14
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Last Modified: 2014-01-16
Hi

I am using cycle2 to create a carousel of logos.

Seen on this page http://facilitiescollective.com/founding-partners.php
(alongside title "founding partners")

When clicked it drops down some information.

As the carousel loops cycle2 is creating duplicates. The duplicated logos don't drop down information and it appears i cant access them. Any ideas why?

(try clicking the 8th logo which is a duplicate of the 1st for an example of the problem)

Thanks
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Question by:coolispaul
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8 Comments
 
LVL 38

Expert Comment

by:Tom Beck
ID: 39780492
I can see one problem but I haven't determined if it's THE problem. Whatever code is duplicating the logo containers is also duplicating the ids of those containers causing multiple elements with the same id on the page. That will cause problems on a page where a script is trying to access elements by id.
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LVL 58

Expert Comment

by:Gary
ID: 39780515
You are targeting your dropdown by the class (item1,item2 etc)  but you have multiple elements with the same class - I'm surprised it's even working properly for the initial logos (before they are replicated)
Your dropdowns should probably have an ID using text1, text2 etc
Then in your js you can target a definitive element by changing
$("."+el).slideDown();
to
$("#"+el).slideDown();

You then should remove the ID from your slideshow logo's.
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LVL 58

Expert Comment

by:Gary
ID: 39780578
You should also target your logos with more specificity

Not this way which attaching itself to every div within the container
$("#partners div").on("click", function(){

But this way which only targets the logos
$("#partners .cycle-carousel-wrap .item").on("click", function(){
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LVL 43

Accepted Solution

by:
Chris Stanyon earned 500 total points
ID: 39782138
Drop the item1, item2 classes etc. from the logo containers as well as the IDs. Add a data attribute to the logos themselves (call it panel for example) containing the class of the element you want to slide, and then bind the click event to the images rather than the DIVs. Because they're dynamically created you need to delegate the event to something that exists on page load (#partners for example)

<div class="item"><img data-panel="item1" src="/admin/resources/pgsfinal2.jpg" /></div>
<div class="item"><img data-panel="item2" src="/admin/resources/miltonabbeyfinal2.jpg" /></div>
<div class="item"><img data-panel="item3" src="/admin/resources/kimboltonfinal2.jpg" /></div>

Open in new window

Then your jQuery would just need to grab the panel data attribute from the clicked image

$("#partners").on("click", ".item img", function() {
   var el = $(this).data('panel');
   $("#partners .text").slideUp();
   $("."+el).slideDown();
   ...

Open in new window

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Author Comment

by:coolispaul
ID: 39785235
thanks chris Stanyon this works great

Would you mind explaining why this works and mine didnt?

Thanks
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LVL 43

Expert Comment

by:Chris Stanyon
ID: 39785250
Normally events are bound to the elements when the page first loads. When your page loaded, the click event was bound to your original logos. Once the carousel starts it duplicates the logos so they can cycle, but the event binding has already taken place, so the duplicated logos won't have the click event bound to them (because they didn't exist at the start).

This is why you need to bind the event to an element that already exists at the start (#partners) and then delegate to the img. That way the event will apply to any images inside #partners irrespective of when they were created.

Glad it worked - binding events to dynamically created elements can be a bit of a gotcha if you're not careful :)
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Author Comment

by:coolispaul
ID: 39785266
perfect thanks for your help
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Author Closing Comment

by:coolispaul
ID: 39785268
great explanation also, helping my understanding
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