Initial commit: Todo app with vanilla JS and localStorage
- Single-file HTML app with embedded CSS and JS - Add, complete, and delete todos - Filter by All/Active/Completed - Persistent storage via localStorage - Responsive design with clean UI - README with usage instructions
This commit is contained in:
Conduit Agent
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README.md
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README.md
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# ✅ Todo App
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A clean, minimal todo application built with **vanilla JavaScript**, **HTML**, and **CSS** — no frameworks, no dependencies, no build tools.
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## ✨ Features
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- **Add todos** — type and press Enter or click Add
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- **Complete todos** — click the circle checkbox to toggle
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- **Delete todos** — hover and click the ✕ button
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- **Filter todos** — view All, Active, or Completed
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- **Clear completed** — bulk remove finished tasks
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- **Persistent storage** — todos survive page refreshes via `localStorage`
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- **Live stats** — see total, active, and completed counts
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- **Responsive design** — works on desktop and mobile
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- **Keyboard friendly** — press Enter to quickly add todos
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## 🚀 Getting Started
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No build step required! Just open the file:
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```bash
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# Option 1: Open directly in your browser
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open index.html
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# Option 2: Serve with Python
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python3 -m http.server 8080
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# Option 3: Serve with Node.js
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npx serve .
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```
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Then visit `http://localhost:8080` (for options 2 & 3).
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## 📁 Project Structure
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```
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todo-app/
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├── index.html # The entire app — HTML, CSS, and JS in one file
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└── README.md # You're reading it
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```
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## 🛠️ Tech Stack
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| Tech | Purpose |
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|------|---------|
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| HTML5 | Structure |
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| CSS3 | Styling with gradients, animations, and responsive layout |
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| Vanilla JS | App logic, DOM manipulation, event handling |
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| localStorage | Client-side data persistence |
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## 💡 How It Works
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1. Todos are stored as a JSON array in `localStorage`
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2. Each todo has an `id` (timestamp), `text`, `completed` flag, and `createdAt` date
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3. The `render()` function re-draws the list based on current state and active filter
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4. All mutations (add, toggle, delete, clear) update state → save to localStorage → re-render
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## 📝 License
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MIT — do whatever you want with it.
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index.html
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index.html
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<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="UTF-8">
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<title>✅ Todo App</title>
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<style>
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* {
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margin: 0;
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padding: 0;
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box-sizing: border-box;
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}
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body {
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font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
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background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
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min-height: 100vh;
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display: flex;
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justify-content: center;
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align-items: flex-start;
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padding: 40px 20px;
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}
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.container {
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background: #fff;
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border-radius: 16px;
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box-shadow: 0 20px 60px rgba(0, 0, 0, 0.2);
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width: 100%;
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max-width: 520px;
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overflow: hidden;
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}
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.header {
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background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
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padding: 30px;
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text-align: center;
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}
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.header h1 {
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color: #fff;
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font-size: 1.8rem;
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font-weight: 700;
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letter-spacing: 1px;
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}
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.header p {
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color: rgba(255, 255, 255, 0.8);
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margin-top: 6px;
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font-size: 0.9rem;
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}
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.input-section {
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display: flex;
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padding: 20px;
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gap: 10px;
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border-bottom: 1px solid #eee;
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}
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.input-section input {
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flex: 1;
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padding: 12px 16px;
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border: 2px solid #e0e0e0;
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border-radius: 10px;
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font-size: 1rem;
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outline: none;
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transition: border-color 0.3s;
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}
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.input-section input:focus {
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border-color: #667eea;
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}
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.input-section button {
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padding: 12px 20px;
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background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
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color: #fff;
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border: none;
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border-radius: 10px;
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font-size: 1rem;
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font-weight: 600;
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cursor: pointer;
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transition: transform 0.15s, box-shadow 0.15s;
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}
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.input-section button:hover {
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transform: translateY(-1px);
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box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
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}
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.input-section button:active {
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transform: translateY(0);
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}
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.stats {
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display: flex;
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justify-content: space-around;
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padding: 14px 20px;
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background: #f8f9fa;
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border-bottom: 1px solid #eee;
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font-size: 0.85rem;
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color: #666;
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}
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.stats span {
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font-weight: 700;
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color: #667eea;
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}
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.filters {
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display: flex;
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justify-content: center;
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gap: 8px;
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padding: 14px 20px;
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border-bottom: 1px solid #eee;
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}
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.filters button {
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padding: 6px 16px;
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border: 2px solid #e0e0e0;
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border-radius: 20px;
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background: #fff;
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font-size: 0.85rem;
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cursor: pointer;
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transition: all 0.2s;
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color: #555;
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}
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.filters button.active {
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border-color: #667eea;
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background: #667eea;
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color: #fff;
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}
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.filters button:hover:not(.active) {
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border-color: #667eea;
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color: #667eea;
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}
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.todo-list {
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list-style: none;
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padding: 10px 20px 20px;
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min-height: 80px;
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}
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.todo-list .empty-state {
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text-align: center;
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padding: 40px 20px;
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color: #bbb;
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font-size: 1rem;
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}
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.todo-item {
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display: flex;
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align-items: center;
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padding: 14px 12px;
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margin: 6px 0;
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border-radius: 10px;
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background: #f8f9fa;
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transition: all 0.2s;
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animation: slideIn 0.3s ease;
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}
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@keyframes slideIn {
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from {
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opacity: 0;
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transform: translateY(-10px);
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}
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to {
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opacity: 1;
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transform: translateY(0);
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}
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}
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.todo-item:hover {
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background: #eef0ff;
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}
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.todo-item .checkbox {
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width: 22px;
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height: 22px;
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border: 2px solid #ccc;
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border-radius: 50%;
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cursor: pointer;
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display: flex;
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align-items: center;
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justify-content: center;
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flex-shrink: 0;
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transition: all 0.2s;
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}
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.todo-item .checkbox:hover {
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border-color: #667eea;
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}
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.todo-item.completed .checkbox {
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background: #667eea;
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border-color: #667eea;
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}
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.todo-item.completed .checkbox::after {
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content: '✓';
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color: #fff;
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font-size: 14px;
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font-weight: 700;
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}
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.todo-item .text {
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flex: 1;
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margin: 0 14px;
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font-size: 0.95rem;
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color: #333;
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word-break: break-word;
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}
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.todo-item.completed .text {
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text-decoration: line-through;
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color: #aaa;
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}
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.todo-item .delete-btn {
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width: 30px;
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height: 30px;
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border: none;
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background: transparent;
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color: #ccc;
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font-size: 1.2rem;
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cursor: pointer;
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border-radius: 50%;
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display: flex;
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align-items: center;
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justify-content: center;
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transition: all 0.2s;
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flex-shrink: 0;
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}
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.todo-item .delete-btn:hover {
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background: #ffe0e0;
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color: #e74c3c;
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}
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.footer {
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padding: 14px 20px;
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text-align: center;
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border-top: 1px solid #eee;
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}
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.footer button {
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padding: 8px 20px;
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background: transparent;
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border: 2px solid #e74c3c;
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color: #e74c3c;
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border-radius: 20px;
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font-size: 0.85rem;
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cursor: pointer;
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transition: all 0.2s;
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}
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.footer button:hover {
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background: #e74c3c;
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color: #fff;
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}
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</style>
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</head>
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<body>
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<div class="container">
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<div class="header">
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<h1>✅ Todo App</h1>
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<p>Stay organized, get things done</p>
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</div>
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<div class="input-section">
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<input type="text" id="todoInput" placeholder="What needs to be done?" autofocus>
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<button onclick="addTodo()">Add</button>
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</div>
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<div class="stats" id="stats">
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<div>Total: <span id="totalCount">0</span></div>
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<div>Active: <span id="activeCount">0</span></div>
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<div>Completed: <span id="completedCount">0</span></div>
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</div>
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<div class="filters">
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<button class="active" onclick="setFilter('all', this)">All</button>
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<button onclick="setFilter('active', this)">Active</button>
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<button onclick="setFilter('completed', this)">Completed</button>
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</div>
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<ul class="todo-list" id="todoList"></ul>
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<div class="footer" id="footer" style="display:none;">
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<button onclick="clearCompleted()">🗑️ Clear Completed</button>
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</div>
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</div>
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<script>
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// ── State ──────────────────────────────────────────
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let todos = JSON.parse(localStorage.getItem('todos')) || [];
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let currentFilter = 'all';
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// ── Persistence ────────────────────────────────────
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function save() {
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localStorage.setItem('todos', JSON.stringify(todos));
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}
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// ── Add ────────────────────────────────────────────
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function addTodo() {
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const input = document.getElementById('todoInput');
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const text = input.value.trim();
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if (!text) return;
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todos.push({
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id: Date.now(),
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text,
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completed: false,
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createdAt: new Date().toISOString()
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});
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save();
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render();
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input.value = '';
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input.focus();
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}
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// ── Toggle Complete ────────────────────────────────
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function toggleTodo(id) {
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const todo = todos.find(t => t.id === id);
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if (todo) todo.completed = !todo.completed;
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save();
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render();
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}
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// ── Delete ─────────────────────────────────────────
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function deleteTodo(id) {
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todos = todos.filter(t => t.id !== id);
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save();
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render();
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}
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// ── Clear Completed ────────────────────────────────
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function clearCompleted() {
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todos = todos.filter(t => !t.completed);
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save();
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render();
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}
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// ── Filter ─────────────────────────────────────────
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function setFilter(filter, btn) {
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currentFilter = filter;
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document.querySelectorAll('.filters button').forEach(b => b.classList.remove('active'));
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btn.classList.add('active');
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render();
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}
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// ── Render ─────────────────────────────────────────
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function render() {
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const list = document.getElementById('todoList');
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const filtered = todos.filter(t => {
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if (currentFilter === 'active') return !t.completed;
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if (currentFilter === 'completed') return t.completed;
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return true;
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});
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if (filtered.length === 0) {
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list.innerHTML = `<div class="empty-state">${
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todos.length === 0
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? '🎯 Add your first todo above!'
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: 'No todos match this filter.'
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}</div>`;
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} else {
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list.innerHTML = filtered.map(todo => `
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<li class="todo-item ${todo.completed ? 'completed' : ''}">
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<div class="checkbox" onclick="toggleTodo(${todo.id})"></div>
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<span class="text">${escapeHTML(todo.text)}</span>
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<button class="delete-btn" onclick="deleteTodo(${todo.id})" title="Delete">✕</button>
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</li>
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`).join('');
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}
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// Update stats
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const total = todos.length;
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const completed = todos.filter(t => t.completed).length;
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const active = total - completed;
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document.getElementById('totalCount').textContent = total;
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document.getElementById('activeCount').textContent = active;
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document.getElementById('completedCount').textContent = completed;
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// Show/hide clear button
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document.getElementById('footer').style.display = completed > 0 ? 'block' : 'none';
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}
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// ── Helpers ────────────────────────────────────────
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function escapeHTML(str) {
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const div = document.createElement('div');
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div.textContent = str;
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return div.innerHTML;
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}
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// ── Keyboard Support ───────────────────────────────
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document.getElementById('todoInput').addEventListener('keydown', e => {
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if (e.key === 'Enter') addTodo();
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});
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// ── Initial Render ─────────────────────────────────
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render();
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</script>
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</body>
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</html>
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