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manipulating childnodes unobtrusively

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Oct 09.2006

i’m just starting to scratch the surface of unobtrusive JS so bare with me…

I have a parent <div> with an id of “content” that contains everything i want to manipulate. Within that <div> there are going to be 1 or more <div>s separating blocks of content (see code). Here’s the deal…

1) I want to capture an array of the “block” <div>s that are one level below the “content” div.
2) I want to capture the array of <div>s that are one level below each “block” div.

I’m assuming if i use the following it will capture ALL <div>s below the “content” not just those one level deep…right?

[code]var blocks=document.getElementById(‘content’).getElementsByTagName(‘div’);[/code]

i’ve been playing with using childnode calls, but i’m not grasping it i guess. i also have to deal with other possible content besides the divs. Any suggestions?

…and here’s the markup…

[code]<div id=”content”>

<div><!– BEGIN BLOCK 1 –>
<img src=”xxx” />
<div>
stuff here…
</div>
<div>
stuff here…
</div>
<div>
stuff here…
</div>
</div><!– END BLOCK 1 –>

<div><!– BEGIN BLOCK 2 –>
<img src=”xxx” />
<div>
stuff here…
</div>
<div>
stuff here…
</div>
<div>
stuff here…
</div>
</div><!– END BLOCK 2 –>

</div>[/code]

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JavaScript

2 Comments(s) ↴

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@KorOct 09.2006 — a parent has childNodes. (this is what you have called "one level below the parent"). The childNodes might have different nodeType and nodeName - that means they might be "tagged" childNodes (elements), text (textNodes), comments.... and if they are tags, they might have differenmt tag names (nodeName) - DIV, SPAN...

So that, first you must build the childNodes collection

var kids=[I]root[/I].childNodes;

Then you have to circle through the childNodes and to build a new "sub-collection" of the childNodes which are DIVs (nodeName=='DIV')

var i=0, k=[], allK

while(allK=kids[i++]){

allK.nodeName=='DIV'?k[k.length]=allK:null;

}

Now here's an example:
<i>
</i>&lt;!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"&gt;
&lt;html&gt;
&lt;head&gt;
&lt;title&gt;Untitled Document&lt;/title&gt;
&lt;meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1"&gt;
&lt;meta http-equiv="Content-Style-Type" content="text/css"&gt;
&lt;meta http-equiv="Content-Script-Type" content="text/javascript"&gt;
&lt;script type="text/javascript"&gt;
function returnKids(root){
var kids=root.childNodes;
var i=0, k=[], allK
while(allK=kids[i++]){
allK.nodeName=='DIV'?k[k.length]=allK:null;
}
return k
}
onload=function(){
var firstLevelDivs=returnKids(document.getElementById('content'));
alert(firstLevelDivs[0].innerHTML);
alert(firstLevelDivs[1].innerHTML)
}
&lt;/script&gt;

&lt;/head&gt;
&lt;body&gt;
&lt;div id="content"&gt;

&lt;div&gt;
&lt;div&gt;block1 div1&lt;/div&gt;
&lt;div&gt;block1 div 2&lt;/div&gt;
&lt;/div&gt;

&lt;div&gt;
&lt;div&gt;block2 div 1&lt;/div&gt;
&lt;div&gt;block2 div 2&lt;/div&gt;
&lt;/div&gt;

&lt;/div&gt;
&lt;/body&gt;
&lt;/html&gt;
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@bcamp1973authorOct 11.2006 — exactly what i was looking for, thank you! ?
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