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This article mainly explains "what the node in html5 refers to". The content of the explanation in the article is simple and clear, and it is easy to learn and understand. Please follow the editor's train of thought to study and learn what the node in html5 refers to.

In html5, node is the most basic part of a web page, and every part of a web page can be called a node, such as html elements, attributes, text, comments, the whole document and so on.

The operating environment of this tutorial: windows7 system, HTML5 version, Dell G3 computer.

A node is the most basic part of our web page, and every part of a web page can be called a node:

The entire document is a document node

Each HTML element is an element node

The text within the HTML element is a text node

Each HTML attribute is an attribute node

Comments are comment nodes

Html elements, attributes, text, comments, the entire document, and so on are all nodes.

There are four types of nodes in HTML:

Document node: represents the entire html

Element node: represents the tag and what it contains

Attribute nodes: attributes in HTML tags

Text node: the content text in the label.

Node tree:

Node parents, children and siblings

The nodes in the node tree have hierarchical relationships with each other.

We often use terms such as parent, child and sibling to describe these relationships. The parent node has child nodes. Sibling child nodes are called siblings (brothers or sisters).

In the node tree, the top node is called the root.

Every node has a parent node, except for the root (it has no parent node).

A node can have any number of child nodes.

Siblings are nodes that have the same parent node.

The following picture shows part of the node tree and the relationship between the nodes:

Look at the following HTML snippet:

Node DOM course 1

Hello world!

From the HTML above:

The node has no parent node; it is the root node

The parent node of and is a node

Text node "Hello world!" The parent node of is

Node

And:

The node has two child nodes: and

A node has two child nodes: and node

The node also has a child node: the text node "DOM tutorial"

And

A node is not only a sibling node, but also a child node

And:

An element is the first child node of an element

The element is the last child node of the element

An element is the first child node of an element

The element is the last child node of the element

Thank you for your reading, the above is the content of "what does the node in html5 refer to". After the study of this article, I believe you have a deeper understanding of what the node in html5 refers to, and the specific use needs to be verified in practice. Here is, the editor will push for you more related knowledge points of the article, welcome to follow!

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