CodeLab

Learn by reading real code

Examples and small projects from our lessons. Read the explanation, copy or download the code, run front-end examples live, and experiment in the Playground.

8Examples

2Projects

6Languages

6Live previews

playground.js

const learner = { name: 'You', level: 'beginner' };

function practise(topic) {
  console.log(`${learner.name} is learning ${topic}!`);
  learner.level = 'getting better';
}

['HTML', 'CSS', 'JavaScript'].forEach(practise);

Open the PlaygroundWrite HTML, CSS & JavaScript and see it run

Results 2

Any level Beginner Intermediate Advanced

Layout Beginner Clear all

index.html

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Profile card</title>
  <style>

Beginner Live preview

A responsive profile card

Build a clean profile card with semantic HTML and a few lines of CSS.

HTML

25 lines View snippet

style.css

.stage {
  display: flex;
  justify-content: center; /* horizontal */
  align-items: center;     /* vertical */
  height: 100vh;
  margin: -8px;
  background: linear-gradient(135deg, #0b3d24, #16a862);

Beginner Live preview

Centre anything with Flexbox

The three lines of CSS that centre an element both ways.

CSS

16 lines View snippet