javascript - Is text considered a node too in the DOM?

I started to read about JavaScript and DOM and I found as on this site that in a structure like this:

  
    
  
  

     The body
   

the text The title and The body are considered nodes too, as represented in the following image (from the same site):

note that The title and The body are represented as children of the actual title respective body nodes. What confuses me is: aren't The title and The body text just values of the nodes




DOM Lesson one

Hello world!

the values of

and

elements are described like nodes too:

has one child: "DOM Lesson one"

has one child: "Hello world!"

Why are text values inside nodes considered different nodes and not just text values of the nodes which contain them?

Thank you!

Answer

What confuses me is: aren't The title and The body text just values of
the nodes and ?

No, they are actually children of the those nodes. You can see it by outputting children property of a title tag:

document.querySelector('title').children

Text nodes are represented as Node.TEXT_NODE=3 as mentioned here. Only form DOM elements, like input, have value property and the text entered in these inputs is contained there.

Besides text nodes, there are comment nodes, like this:

Why are text values inside nodes considered different nodes and not
just text values of the nodes which contain them?

Possible because they need to represent different structure in memory so that it's possible to manipulate it, for example, change color of a text.