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HTML DOM Nodes

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Everything in an HTML document is a node.


Nodes

According to the DOM, everything in an HTML document is a node.

The DOM says that:

  • The entire document is a document node
  • Every HTML tag is an element node
  • The texts contained in the HTML elements are text nodes
  • Every HTML attribute is an attribute node
  • Comments are comment nodes

Node Hierarchy

Nodes have a hierarchical relationship to each other.

All nodes in an HTML document form a document tree (or node tree). The tree starts at the document node and continues to branch out until it has reached all text nodes at the lowest level of the tree.

The following figure represents a document tree (node tree):

DOM HTML tree


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