Sign in
Skip to solution
easyMachine Coding

Build a Todo List

230 views
01

Understand the problem

Build a todo app to add, toggle, edit and delete tasks.

ReactListsForms
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

Building a Todo List in React

Mental model: A todo list is CRUD over an array of { id, text, done }. Keep the list and the current filter in state; derive the visible todos and the active count rather than storing them. Each mutation returns a new array so React re-renders predictably.

Step 1 — Model i

Solution ready — 2 min read

Classified // press E to declassify

04

React solution

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

export default function App() {
  return (
    <div style={{ fontFamily: 'sans-serif', padding: 20 }}>
      <h1>Todo List Demo</h1>
      <TodoList />
    </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 18 of 87 decoded in the Frontend Machine Coding track. One more won't hurt.

Back to track