reactintermediate2 hr est.

React Task Manager Project: Step-by-Step Code & Tutorial

Create a feature-rich Task Manager (Todo App) in React demonstrating state management with arrays, controlled form inputs, task completion toggling, deletion, and local storage persistence.

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Last updated: 2026-06-05

Before You Begin

1
Understanding of React useState hook
2
Familiarity with array methods (map, filter)
3
Knowledge of controlled form components

Project Architecture

Folder Structure

task_manager/
├── src/
│   ├── components/
│   │   ├── TaskInput.jsx
│   │   ├── TaskList.jsx
│   │   └── TaskItem.jsx
│   ├── App.jsx
│   └── index.css
└── package.json

Data Flow

[Input Text & Form Submit] ➔ [addTask Handler] ➔ [Tasks State Array] ➔ [Save to localStorage] ➔ [TaskList Re-render]

Source Code Breakdown & Implementation

### Step 1: Project Setup Initialize a React project and establish component folder hierarchy.

### Step 2: Task State & Local Storage Implement task management logic inside App.jsx.

### Step 3: Components & Rendering Build TaskInput, TaskList, and TaskItem components.

### Step 4: Edge Cases Prevent empty task submissions and handle empty list states beautifully.

Complete Solution Code

Compare your approach

Testing Checklist

• Type task name and press Enter to confirm addition.
• Click checkbox to verify strikethrough completed styling.
• Test filtering tabs (All, Active, Completed).
• Refresh browser and verify tasks persist from localStorage correctly.

Common Bugs

Bug: localStorage returns null on first run.
Fix: Provide fallback empty array in initial state function.
Bug: Form submission reloads the page.
Fix: Call e.preventDefault() inside form handler.