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mediumMachine Coding

Build an Image Carousel

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01

Understand the problem

Build a carousel with next/prev, dots and optional autoplay.

ReactTimersUI
02

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03

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Building an Image Carousel in React

Mental model: A carousel is an index into a slides array plus a translated track. next/prev move the index (wrapping with modulo); a CSS translateX(-index * 100%) slides the strip. Autoplay is an interval that calls next, paused on hover and cleaned up on unmount.

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04

React solution

Complete solutionRun Playground
import React from 'react';
import Carousel from './src/Carousel';

const slides = [
  { id: 1, color: '#2563eb', label: 'Slide 1' },
  { id: 2, color: '#16a34a', label: 'Slide 2' },
  { id: 3, color: '#d97706', label: 'Slide 3' },
  { id: 4, color: '#dc2626', label: 'Slide 4' },
];

export default function App() {
  return (
    <div style={{ fontFamily: 'sans-serif', padding: 20 }}>
      <h1>Carousel Demo</h1>
      <Carousel slides={slides} />
    </div>
  );
}
05

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Dossier 23 of 87 decoded in the Frontend Machine Coding track. One more won't hurt.

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