How to Create a To Do List App Using React?

In this blog, I will explain How to Create a To Do List App Using React.

Introduction

The To-Do List App is a simple and interactive web application built using React.js, a popular JavaScript library for building user interfaces. This app provides users with a straightforward platform to manage their tasks, allowing them to add new to-do items, mark tasks as completed, and delete tasks they’ve accomplished. The application is designed with a clean and intuitive user interface, offering a seamless experience for organizing and tracking daily activities. By utilizing the principles of React.js, the To-Do List App demonstrates the power of component-based architecture and state management in creating dynamic and responsive user interfaces. Users can easily engage with their to-do list, making it a practical and accessible tool for maintaining productivity and staying organized. Whether for personal or professional use, this To-Do List App serves as an excellent starting point for those looking to explore React.js and its capabilities.

Requirements of How to Create a To Do List App Using React

1. The app should display a list of to-do items.
2. Further, users should be able to add new to-do items.
3. Also, users should be able to mark a to-do item as completed.
4. Finally, users should be able to delete a to-do item.

Steps

1. Set up a new React.js project using Create React App or your preferred method.
2. Create a component for the To-Do List (TodoList) that will render the list of to-do items.
3. Further, create a component for individual To-Do items (TodoItem). Each item should display its text and have buttons to mark it as completed and delete it.
4. Then, create a component for adding new to-do items (AddTodo). This component should have an input field and a button to add a new to-do item to the list.
5. Manage the state of the to-do list in a parent component (App). Pass down necessary props to child components.
6. Implement functionality to add new to-do items, mark items as completed, and delete items.
7. Style your components to make the to-do list visually appealing.

Set up a new React App

Use Create React App to set up a new React project. Open your terminal and run.

npx create-react-app react-todo-app
cd react-todo-app

Create Components

After that, create the necessary components (App.js, TodoList.js, TodoItem.js, AddTodo.js) in the src folder.

Example Component Structure

App.js

// src/App.js
import React, { useState } from 'react';
import TodoList from './TodoList';
import AddTodo from './AddTodo';

function App() {
  const [todos, setTodos] = useState([]);

  const addTodo = (text) => {
    setTodos([...todos, { text, completed: false }]);
  };

  const toggleTodo = (index) => {
    const newTodos = [...todos];
    newTodos[index].completed = !newTodos[index].completed;
    setTodos(newTodos);
  };

  const deleteTodo = (index) => {
    const newTodos = [...todos];
    newTodos.splice(index, 1);
    setTodos(newTodos);
  };

  return (
    <div>
      <h1>To-Do List</h1>
      <AddTodo addTodo={addTodo} />
      <TodoList todos={todos} toggleTodo={toggleTodo} deleteTodo={deleteTodo} />
    </div>
  );
}

export default App;

TodoList.js

// src/TodoList.js
import React from 'react';
import TodoItem from './TodoItem';

function TodoList({ todos, toggleTodo, deleteTodo }) {
  return (
    <ul>
      {todos.map((todo, index) => (
        <TodoItem
          key={index}
          index={index}
          todo={todo}
          toggleTodo={toggleTodo}
          deleteTodo={deleteTodo}
        />
      ))}
    </ul>
  );
}

export default TodoList;

TodoItem.js

// src/TodoItem.js
import React from 'react';

function TodoItem({ index, todo, toggleTodo, deleteTodo }) {
  return (
    <li>
      <span style={{ textDecoration: todo.completed ? 'line-through' : 'none' }}>
        {todo.text}
      </span>
      <button onClick={() => toggleTodo(index)}>Complete</button>
      <button onClick={() => deleteTodo(index)}>Delete</button>
    </li>
  );
}

export default TodoItem;

AddTodo.js

// src/AddTodo.js
import React, { useState } from 'react';

function AddTodo({ addTodo }) {
  const [text, setText] = useState('');

  const handleAddTodo = () => {
    if (text.trim() !== '') {
      addTodo(text);
      setText('');
    }
  };

  return (
    <div>
      <input
        type="text"
        value={text}
        onChange={(e) => setText(e.target.value)}
        placeholder="Add a new to-do"
      />
      <button onClick={handleAddTodo}>Add</button>
    </div>
  );
}

export default AddTodo;

Run the App

Back in the terminal, run the following command to start your React app:

npm start

Output

---

Further Reading

Introduction to React JS

How to Create Class Components in React?

Examples of Array Functions in PHP

How to Create Functional Components in React?

Exploring PHP Arrays: Tips and Tricks

Basic Programs in PHP

Registration Form Using PDO in PHP

Inserting Information from Multiple CheckBox Selection in a Database Table in PHP

PHP Projects for Undergraduate Students

Architectural Constraints of REST API

REST API Concepts

Creating a Classified Ads Application in PHP

How to Create a Bar Chart in ReactJS?

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