HTML Dom tutorial 3-html Dom Node

Source: Internet
Author: User

HTML Dom tutorial 3-html Dom node (node)

 

1: Concepts and types of nodes

According to the Dom, each component in the HTML document is a node.

There are five types of nodes in DOM:

    • The entire document isDocument Node
    • Each HTML tag isElement Node
    • The text contained in the HTML element isText Node
    • Each HTML attribute isAttribute node
    • Annotation belongsComment nodes

2: node hierarchy

TreeStartAnd then stick out until all the text nodes at the lowest level of the tree.

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

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