Code Layout Trainer

Beginners often get lost because the browser, the editor, and AI are not “looking” at the same mental map. This page teaches you a simple, reliable structure so you always know where code goes and why it goes there.

HTML = structure

What elements exist (divs, buttons, headers).

CSS = style

How it looks (colors, spacing, layout).

JS = behavior

What it does (clicks, API calls, logic).

The “Map”

Click a section to learn what belongs there.

Lesson

Click a section on the left.

What it is

—

What goes here

—

Common mistakes

Example snippet

—

Practice (mini)

Paste an example snippet here and tweak it. This is a learning pad.

Super common beginner bug

“My button doesn’t click.”

Usually it’s one of these:

JS runs before the button exists (script in wrong place)
The ID doesn’t match
CSS overlay blocks clicks