HTML DOM Nodes
In the DOM, everything in an HTML document is a node.
Nodes
According to the DOM, everything in an HTML document is a node.
The DOM says:
- The
entire document is a document node
- Every HTML tag is an element node
- The text in the HTML elements are text
nodes
- Every HTML attribute is an attribute node
- Comments are comment nodes
DOM Example
Look at the following HTML document:
<html>
<head>
<title>DOM Tutorial</title>
</head>
<body>
<h1>DOM Lesson one</h1>
<p>Hello world!</p>
</body>
</html>
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The root node in the HTML above is <html>. All other nodes in the document
are contained within <html>.
The <html> node has two child nodes; <head> and <body>.
The <head> node holds a <title> node. The <body> node holds a <h1> and <p>
node.
Text is Always Stored in Text Nodes
A common error in DOM processing is to expect an element node to contain
text.
However, the text of an element node is stored in a text node.
In this example: <title>DOM Tutorial</title>, the element node
<title>, holds a text node with the value "DOM Tutorial".
"DOM Tutorial" is not the value of the <title> element!
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