JavaScript

Create a web-based PDF viewer using HTML5, CSS3, JavaScript and PDF.js. Build a clean interface with intuitive navigation controls. Implement page navigation with thumbnails and outline view. Add text search with result highlighting. Include zoom and fit-to-width/height controls. Implement text selection and copying. Add annotation tools including highlights, notes, and drawing. Support document rotation and presentation mode. Include print functionality with options. Create a responsive design that works on all devices. Add document properties and metadata display.

Build an interactive typing speed test using HTML5, CSS3, and JavaScript. Create a clean interface with text display and input area. Implement WPM and accuracy calculation in real-time. Add difficulty levels with appropriate text selection. Include error highlighting and correction tracking. Implement test history with performance graphs. Add custom test creation with text import. Include virtual keyboard display showing keypresses. Support multiple languages and keyboard layouts. Create a responsive design for all devices. Add competition mode with leaderboards.

Develop a memory matching card game using HTML5, CSS3, and JavaScript. Create visually appealing card designs with flip animations. Implement difficulty levels with varying grid sizes and card counts. Add timer and move counter for scoring. Include sound effects for card flips and matches. Implement leaderboard with score persistence. Add theme selection with different card designs. Include multiplayer mode for competitive play. Create responsive layout that adapts to screen size. Add accessibility features for keyboard navigation. Implement progressive difficulty increase during gameplay.

Create an exciting 3D racing game using Three.js and JavaScript. Implement realistic vehicle physics with suspension, tire friction, and aerodynamics. Create detailed car models with customizable paint and upgrades. Design multiple race tracks with varying terrain and obstacles. Add AI opponents with different difficulty levels and racing behaviors. Implement a split-screen multiplayer mode for local racing. Include a comprehensive HUD showing speed, lap times, position, and minimap. Create particle effects for tire smoke, engine effects, and weather. Add dynamic day/night cycle with realistic lighting. Implement race modes including time trial, championship, and elimination. Include replay system with multiple camera angles.

Build an immersive 3D space exploration game using Three.js and JavaScript. Create a vast universe with procedurally generated planets, stars, and nebulae. Implement realistic spacecraft controls with Newtonian physics. Add detailed planet surfaces with terrain generation and atmospheric effects. Create space stations and outposts for trading and missions. Implement resource collection and cargo management systems. Add alien species with unique behaviors and interactions. Create wormhole travel effects between star systems. Include detailed ship customization and upgrade system. Implement mining and combat mechanics with weapon effects. Add mission system with story elements and objectives.

Develop a first-person shooter game using Three.js and JavaScript. Create detailed weapon models with realistic animations and effects. Implement precise hit detection and damage systems. Design multiple game levels with various environments and objectives. Add AI enemies with pathfinding and combat behaviors. Create particle effects for muzzle flashes, impacts, and explosions. Implement multiplayer mode with team-based objectives. Include weapon pickup and inventory system. Add sound effects for weapons, footsteps, and environment. Create detailed scoring and statistics tracking. Implement replay system for kill cams and match highlights.

Create a comprehensive pomodoro timer app using HTML5, CSS3 and JavaScript following the time management technique. Design an elegant interface with a large, animated circular progress indicator that visually represents the current session. Allow customization of work intervals (default 25min), short breaks (default 5min), and long breaks (default 15min). Include a task list integration where users can associate pomodoro sessions with specific tasks. Add configurable sound notifications for interval transitions with volume control. Implement detailed statistics tracking daily/weekly productivity with visual charts. Use localStorage to persist settings and history between sessions. Make the app installable as a PWA with offline support and notifications. Add keyboard shortcuts for quick timer control (start/pause/reset). Include multiple theme options with customizable colors and fonts. Add a focus mode that blocks distractions during work intervals.

Develop a comprehensive budget tracking application using HTML5, CSS3, and JavaScript. Create an intuitive dashboard showing income, expenses, savings, and budget status. Implement transaction management with categories, tags, and recurring transactions. Add interactive charts and graphs for expense analysis by category and time period. Include budget goal setting with progress tracking and alerts. Support multiple accounts and transfer between accounts. Implement receipt scanning and storage using the device camera. Add export functionality for reports in CSV and PDF formats. Create a responsive design with mobile-first approach. Include data backup and restore functionality. Add forecasting features to predict future financial status based on current trends.

Develop a comprehensive flashcard study system using HTML5, CSS3, and JavaScript. Create an intuitive interface for card creation and review. Implement spaced repetition algorithm for optimized learning. Add support for text, images, and audio on cards. Include card categorization with decks and tags. Implement study sessions with performance tracking. Add self-assessment with confidence levels. Create statistics dashboard showing learning progress. Support import/export of card decks in standard formats. Implement keyboard shortcuts for efficient review. Add dark mode and customizable themes.

Create a responsive todo app with HTML5, CSS3 and vanilla JavaScript. The app should have a modern, clean UI using CSS Grid/Flexbox with intuitive controls. Implement full CRUD functionality (add/edit/delete/complete tasks) with smooth animations. Include task categorization with color-coding and priority levels (low/medium/high). Add due dates with a date-picker component and reminder notifications. Use localStorage for data persistence between sessions. Implement search functionality with filters for status, category, and date range. Add drag and drop reordering of tasks using the HTML5 Drag and Drop API. Ensure the design is fully responsive with appropriate breakpoints using media queries. Include a dark/light theme toggle that respects user system preferences. Add subtle micro-interactions and transitions for better UX.

Build a comprehensive weather dashboard using HTML5, CSS3, JavaScript and the OpenWeatherMap API. Create a visually appealing interface showing current weather conditions with appropriate icons and background changes based on weather/time of day. Display a detailed 5-day forecast with expandable hourly breakdown for each day. Implement location search with autocomplete and history, supporting both city names and coordinates. Add geolocation support to automatically detect user's location. Include toggles for temperature units (°C/°F) and time formats. Display severe weather alerts with priority highlighting. Show detailed meteorological data including wind speed/direction, humidity, pressure, UV index, and air quality when available. Include sunrise/sunset times with visual indicators. Create a fully responsive layout using CSS Grid that adapts to all device sizes with appropriate information density.