DOM - Root Node of the document

About

The root Node is the root of the document tree.

• in html, this the HTML element
• in xml, this the XML element
• in svg, this the SVG element
• …

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Javascript

en-US/docs/Web/API/Document/documentElement

var rootElement = document.documentElement;
var firstTier = rootElement.childNodes;

// firstTier is the NodeList of the direct children of the root element
console.log("The child nodes of the root element are");
for (var i = 0; i < firstTier.length; i++) {
   // do something with each direct kid of the root element
   // as firstTier[i]
   console.log("Node "+i+": Tag Name="+firstTier[i].tagName+", Node Type="+firstTier[i].nodeType);
}

where:

• Node Type