Say,is the following possible:
textNode.appendChild(elementNode);
elementNode
refers to those with nodeType
set to 1
textNode
refers to those with nodeType
set to 2
It's not easy to produce.
The reason I ask this is that I find a function that adds a cite link to the end of a quotation:
function displayCitations() {
var quotes = document.getElementsByTagName("blockquote");
for (var i=0; i<quotes.length; i++) {
if (!quotes[i].getAttribute("cite")) continue;
var url = quotes[i].getAttribute("cite");
var quoteChildren = quotes[i].getElementsByTagName('*');
if (quoteChildren.length < 1) continue;
var elem = quoteChildren[quoteChildren.length - 1];
var link = document.createElement("a");
var link_text = document.createTextNode("source");
link.appendChild(link_text);
link.setAttribute("href",url);
var superscript = document.createElement("sup");
superscript.appendChild(link);
elem.appendChild(superscript);
}
}
see the last line "elem.appendChild(superscript);
" where elem
can be a textNode
?
I think the reason it's difficult to prove it because it's hard to get access to a specified textNode
. Have anyone any way to achieve that?
No, text nodes are always leafs. Instead you must add new nodes to the text node's parent - making them siblings of the text node.
Here's an example where I attempt to add a child to a text node.
<div id="test">my only child is this text node</div>
<script type="text/javascript">
var div = document.getElementById( 'test' );
var textNode = div.childNodes[0];
var superscript = document.createElement("sup");
superscript.text = 'test';
textNode.appendChild( superscript );
</script>
Firefox gives the error
uncaught exception: Node cannot be inserted at the specified point in the hierarchy (NS_ERROR_DOM_HIERARCHY_REQUEST_ERR)
I don't think so; I'm fairly certain that something like
<div>this is some <a href="...">text</a> with an element inside it.</div>
ends up being:
<div>
<textnode/>
<a>
<textnode/>
</a>
<textnode/>
</div>
I don't believe textNodes can have children.
If I had to guess, I'd think that the result of adding a child node to a text node would be to add the element to the text node's parent instead, but I've not tested that at all.
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