: I think you already have your answer really. Explain each topic in it's own chapter as you have them, then create a new chapter which explains this additional feature which alters the behavior

@Ravi5107385

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I think you already have your answer really.
Explain each topic in it's own chapter as you have them, then create a new chapter which explains this additional feature which alters the behavior of these other items.

Use Layers of Explanation Create Layers of Understanding

Breaking it up this way and explaining the foundational points you want your reader to understand first, will create layers of understanding which then make later materials more easy to grasp.

Let's use HTML, CSS and JavaScript as an example.

Chapter 1: What Is HTML?

HTML stands for HyperText Markup Language...
...

HTML is the structure of your document. It allows us to create
the structure of the DOM (Document Object Model) The tag is a
block type of HTML element. ...

Chapter 2: What Is CSS?

CSS is an acronym meaning Cascading Style
Sheets...
...

To style all of the <DIV> tags with a class="book" <DIV>
class="book") we can do something like the following:
#book {color:red; padding: 2px 2px 2px 2px;}

Chapter 3: What Is JavaScript

JavaScript can be used to manipulate the DOM -- the structure of the HTML :

<div id='extra'>test</div>

document.getElementById("extra").appendChild(node);

JavaScript can also be used to alter the style of particular DOM
element.

document.getElementById("p2").style.color = "blue";

Foundation Is Solid

By the time your readers get to the JavaScript (more advanced topic which requires the understanding of the previous information) they will be able to add this new layer of understanding because you've built a foundation for them.

I hope this helps. Good luck with your project.

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