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Build a Notification Badge

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01

Understand the problem

Build a bell icon with an unread-count badge.

ReactUIBadge
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

This tutorial will guide you through building a Notification Badge component in React.

Mental Model

The core idea is to have a parent NotificationBadge component that renders a bell icon and conditionally displays a smaller badge component with the unread count. The count will be managed via React state and upda

Solution ready — 2 min read

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04

React solution

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

export default function App() {
  const [unreadCount, setUnreadCount] = useState(0);

  const incrementCount = () => {
    setUnreadCount(prevCount => prevCount + 1);
  };

  const resetCount = () => {
    setUnreadCount(0);
  };

  return (
    <div style={{ fontFamily: 'sans-serif', textAlign: 'center', padding: '20px' }}>
      <h1>Notification Badge Demo</h1>
      <NotificationBadge count={unreadCount} />
      <p>Current unread count: {unreadCount}</p>
      <button onClick={incrementCount} style={{ margin: '5px', padding: '10px 15px' }}>
        Add Notification
      </button>
      <button onClick={resetCount} style={{ margin: '5px', padding: '10px 15px' }}>
        Clear Notifications
      </button>
    </div>
  );
}
05

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