📄 prop_node_firstchild.asp
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<h1>XML DOM firstChild Property</h1><hr />
<a href="dom_node.asp"><img class="navup" src="../images/up.gif" alt="Node Object Reference" border="0" /> Complete Node Object Reference</a>
<hr />
<h2>Definition and Usage</h2>
<p>The firstChild property returns the first child node of the specified node.</p>
<h2>Syntax</h2>
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<pre>nodeObject.firstChild</pre>
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<h2>Tips and Notes</h2>
<p><b>Note:</b> Firefox, and most other browsers, will treat empty white-spaces
or new lines as text nodes, Internet Explorer will not. So,
in the example below, we have a function that checks
the node type of the first child node.</p>
<p>Element nodes has a nodeType of 1, so if the first child node is not an
element node, it moves to the next node, and checks if this node is an element
node. This continues until the first child node (which must be an element node)
is found. This way, the result will be correct in all browsers.</p>
<p><b>Tip:</b> To read more about the differences between browsers, visit our
<a href="dom_mozilla_vs_ie.asp">DOM Browsers</a> chapter in our XML DOM
Tutorial.</p>
<hr />
<h2>Example</h2>
<p>The following code fragment loads "<a target="_blank" href="books.xml">books.xml</a>"
into xmlDoc using <a href="dom_loadxmldoc.asp">
loadXMLDoc()</a> and displays the node name and node type of the
first child node:</p>
<table class="ex" id="table39" border="1" cellspacing="0" width="100%">
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<pre>//check if the first node is an element node
function get_firstchild(n)
{
x=n.firstChild;
while (x.nodeType!=1)
{
x=x.nextSibling;
}
return x;
}</pre>
<pre>xmlDoc=loadXMLDoc("books.xml");</pre>
<pre>x=get_firstchild(xmlDoc);
document.write("Nodename: " + x.nodeName);
document.write(" (nodetype: " + x.nodeType);</pre>
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<p>Output:</p>
<table class="ex" id="table40" border="1" cellspacing="0" width="100%">
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<td>
<pre>Nodename: bookstore (nodetype: 1)</pre>
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<h2>Try-It-Yourself Demos</h2>
<p><a target="_blank" href="tryit.asp@filename=try_dom_doc_firstchild">Get the
first child node of the document</a></p>
<p><a target="_blank" href="tryit.asp@filename=try_dom_doc_lastchild">Get the
last child node of the document</a></p>
<hr />
<a href="dom_node.asp"><img class="navup" src="../images/up.gif" alt="Node Object Reference" border="0" /> Complete Node Object Reference</a>
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