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Build a Toast Notification system

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01

Understand the problem

Build a toast system that stacks and auto-dismisses notifications.

ReactTimersQueue
02

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Building a Toast Notification System in React

Mental model: A toast system is a queue of { id, type, message } rendered in a fixed-position stack, where each toast auto-dismisses after a timeout. The trick is a single add function that pushes a toast and schedules its own removal, plus manual dismissal — bo

Solution ready — 2 min read

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04

React solution

Complete solutionRun Playground
import React from 'react';
import Toaster, { useToasts } from './src/Toaster';

function Demo() {
  const { add } = useToasts();
  return (
    <div style={{ display: 'flex', gap: 8 }}>
      <button onClick={() => add('Saved successfully', 'success')} style={{ padding: '8px 14px', cursor: 'pointer' }}>Success</button>
      <button onClick={() => add('Something went wrong', 'error')} style={{ padding: '8px 14px', cursor: 'pointer' }}>Error</button>
      <button onClick={() => add('Heads up — new update', 'info')} style={{ padding: '8px 14px', cursor: 'pointer' }}>Info</button>
    </div>
  );
}

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

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Transmission complete // awaiting log

KEEP THE
STREAK ALIVE.

Dossier 47 of 87 decoded in the Frontend Machine Coding track. One more won't hurt.

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