07 · The building blocks
HTML, CSS, and JavaScript
These three languages work together to create most of what people see and use on a webpage.
Plain meaning
HTML is the structure, CSS is the appearance, and JavaScript is the behavior.
Think of a house
- HTML: The walls, rooms, doors, and labels.
- CSS: The paint, furniture, spacing, and lighting.
- JavaScript: The switches, elevators, alarms, and interactive parts.
What this means in practice
A heading and paragraph are HTML. The font, color, and layout are CSS. A menu that opens, a form that validates, or a button that changes something uses JavaScript.
Next step
Start with clean HTML and clear content. Add CSS to make it comfortable. Add JavaScript only when the page needs behavior that HTML and CSS cannot provide.