Full-stack JavaScript (7) Learning Comment nodes.

Comment in the DOM, represented by Comment nodes. The constructor function is: function Comment () {[native code]}.

Features of comment nodes:

• NodeType: 8
• NodeName: # comment,
• NodeValue: Comment content,
• ParsentNode: it may be an Element node or a Document node. (comments outside the html Tag)
• Subnodes are not supported.

Both the Comment and Text types inherit from the CharacterData type. All operations except the splitText () method are the same as those of the Text type node.

Document. createComment (), which can be used to create a Comment node. The parameter is a string.

In actual development, note nodes are rarely created and accessed, because note nodes have little impact on algorithms. In addition, the browser does not recognize the comment behind the