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avoiding duplicate ids with cloneNode

Posted on 2008-10-07
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Last Modified: 2012-06-27
I like to use cloneNode instead of dynamically building up html via DOM methods. However, grabbing the element via getElementBy Id and then clone it, you have duplicate ids.

I usually use the technique in ex 2, but I was wondering if there is anything wrong with the way in ex 1 where I grab the element by id, remove the id attribute, clone the element, set the id attribute back again

<!--  this div just holds templates for cloning -->

<div id="tpl_holder" style="display:none">
 

   <div "confirm_tpl">

   <-- bunch of html here -->

   </div>
 

</div>
 

// ex 1:

var confirm_tpl = getElementByID("confirm_tpl");

confirm_tpl.removeAtrribute("id");

var confirm = confirm_tpl.cloneNode(true);

confirm_tpl.setAtrribute("id","confirm_tpl");
 
 

// ex 2:

var remove_div = getElementsByClassName("commands",getElementByID("tpl_holder"),"div")[0].cloneNode(true);

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Question by:drew22
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Expert Comment

by:David S.
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Why remove the ID of the element before cloning it? Why not just change the ID of the clone before adding it as a child of an element in the document?
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by:drew22
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>>Why not just change the ID of the clone before adding it as a child
because before you change the id of the clone you will have 2 elements with the same id and element ids must be unique
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Accepted Solution

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David S. earned 500 total points
Comment Utility
Yes, but the problem is only if both elements are part of the document. If only one of them is, then it doesn't matter.
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Author Comment

by:drew22
Comment Utility
right, the clone isn't yet part of the document. forgot about that
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