Sign in
Skip to solution
easyMachine Coding

Build a Dropdown Menu

299 views
01

Understand the problem

Build a button-triggered dropdown menu with keyboard support.

ReactMenuAccessibility
02

Attempt it yourself

Sketch your approach before reading the solution — that's what interviews test.

Nudge consolestandby

Stuck? Beam a request up — the console returns a conceptual nudge that guides your logic without spoiling the implementation.

03

Study the solution

Solve in

Build a Dropdown Menu in React

Mental Model: The core idea is to manage the dropdown's visibility with a state variable. We'll use a button to toggle this state and an onClick handler on the document to close it when clicking outside. Keyboard navigation will involve onKeyDown handlers to manage focus and v

Solution ready — 2 min read

Classified // press E to declassify

04

React solution

Complete solutionRun Playground
import React, { useState } from 'react';
import DropdownMenu from './src/DropdownMenu';

export default function App() {
  const [selectedOption, setSelectedOption] = useState('None');

  return (
    <div style={{ fontFamily: 'sans-serif', padding: '20px' }}>
      <h1>Dropdown Menu Demo</h1>
      <p>Click the button or use keyboard (Space/Enter to open, Arrows to navigate, Escape to close).</p>
      <DropdownMenu onSelect={setSelectedOption} />
      <p style={{ marginTop: '20px' }}>Current selected option: <strong>{selectedOption}</strong></p>
    </div>
  );
}
05

Join the discussion

Discussion (0)

Sign in to join the discussion.

No responses yet. Be the first to share what you think.

Transmission complete // awaiting log

KEEP THE
STREAK ALIVE.

Dossier 16 of 87 decoded in the Frontend Machine Coding track. One more won't hurt.

Back to track