Method for accessing the nearest node of a node in javascript

In javascript, each node in the document has

ParentNode -- parent node

FirstChild -- the first subnode

LastChild -- last subnode

Previussibling -- brother node next to the front

NextSibling-sibling node next

Five Related nodes. These nodes may not exist and are null. For example, document does not contain the parent node, and TextNode does not.

In this way, you can perform short trips to access some related nodes of the current node.

In addition, there are childNode [] (including all child nodes) and children [] (only child nodes of the element type, excluding textNode ).