HTML, CSS and JavaScript are the browser layer.

Every website starts with the same three foundations: HTML gives content meaning, CSS turns that content into an interface, and JavaScript makes the page respond to the user.

Start with HTML View roadmap

<section class="hero">
  <h1>Build the interface</h1>
  <button>Start lesson</button>
</section>

.hero {
  display: grid;
  gap: 2rem;
}

button.addEventListener("click", startLesson);

Learning path

The frontend stack, in the right order.

The goal is not to memorize tags or properties. The goal is to understand how the browser reads code, builds a page, applies design rules and reacts to user input.

HTML structure

Learn documents, headings, paragraphs, links, sections, forms, semantic elements and accessible markup.

Open HTML fundamentals

CSS layout

Learn selectors, the cascade, box model, spacing, colors, typography, flexbox, grid and responsive design.

Open CSS course

JavaScript behavior

Learn variables, functions, events, DOM updates, form handling, fetch requests and component behavior.

Open JavaScript course

What is frontend development?

Frontend development is the part of web development that runs in the browser. It controls what the user sees, how the interface is structured, how it adapts to screen sizes and how it responds when someone clicks, types, scrolls or submits a form.

How the browser reads a page

The browser receives HTML first. From that document it discovers CSS files, JavaScript files, images and fonts. It builds the document tree, applies style rules and paints pixels to the screen. JavaScript can then read and change the page through the DOM.

Why start with HTML?

HTML is the foundation. Bad HTML makes CSS harder, JavaScript messier, accessibility weaker and SEO less clear. Good HTML gives every page a readable structure before design and interaction are added.