Build a professional-grade color tool
Build a professional-grade color tool with HTML5, CSS3 and JavaScript for designers and developers. Create an intuitive interface with multiple selection methods including eyedropper, color wheel, sliders, and input fields. Implement real-time conversion between color formats (RGB, RGBA, HSL, HSLA, HEX, CMYK) with copy functionality. Add a color palette generator with options for complementary, analogous, triadic, tetradic, and monochromatic schemes. Include a favorites system with named collections and export options. Implement color harmony rules visualization with interactive adjustment. Create a gradient generator supporting linear, radial, and conic gradients with multiple color stops. Add an accessibility checker for WCAG compliance with contrast ratios and colorblindness simulation. Implement one-click copy for CSS, SCSS, and SVG code snippets. Include a color naming algorithm to suggest names for selected colors. Support exporting palettes to various formats (Adobe ASE, JSON, CSS variables, SCSS).
Develop a comprehensive interactive quiz application
Develop a comprehensive interactive quiz application with HTML5, CSS3 and JavaScript. Create an engaging UI with smooth transitions between questions. Support multiple question types including multiple choice, true/false, matching, and short answer with automatic grading. Implement configurable timers per question with visual countdown. Add detailed score tracking with points based on difficulty and response time. Show a dynamic progress bar indicating completion percentage. Include a review mode to see correct/incorrect answers with explanations after quiz completion. Implement a persistent leaderboard using localStorage. Organize questions into categories with custom icons and descriptions. Support multiple difficulty levels affecting scoring and time limits. Generate a detailed results summary with performance analytics and improvement suggestions. Add social sharing functionality for results with customizable messages.
Create a comprehensive pomodoro timer app
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.
Create a comprehensive scientific calculator
Create a comprehensive scientific calculator with HTML5, CSS3 and JavaScript that mimics professional calculators. Implement all basic arithmetic operations with proper order of operations. Include advanced scientific functions (trigonometric, logarithmic, exponential, statistical) with degree/radian toggle. Add memory operations (M+, M-, MR, MC) with visual indicators. Maintain a scrollable calculation history log that can be cleared or saved. Implement full keyboard support with appropriate key mappings and shortcuts. Add robust error handling for division by zero, invalid operations, and overflow conditions with helpful error messages. Create a responsive design that transforms between standard and scientific layouts based on screen size or orientation. Include multiple theme options (classic, modern, high contrast). Add optional sound feedback for button presses with volume control. Implement copy/paste functionality for results and expressions.
Build a responsive todo app with modern UI
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 an immersive multiplayer airplane combat game
Create an immersive multiplayer airplane combat game using Three.js, HTML5, CSS3, and JavaScript with WebSocket for real-time networking. Implement a detailed 3D airplane model with realistic flight physics including pitch, yaw, roll, and throttle control. Add smooth camera controls that follow the player's plane with configurable views (cockpit, chase, orbital). Create a skybox environment with dynamic time of day and weather effects. Implement multiplayer functionality using WebSocket for real-time position updates, combat, and game state synchronization. Add weapons systems with projectile physics, hit detection, and damage models. Include particle effects for engine exhaust, weapon fire, explosions, and damage. Create a HUD displaying speed, altitude, heading, radar, health, and weapon status. Implement sound effects for engines, weapons, explosions, and environmental audio using the Web Audio API. Add match types including deathmatch and team battles with scoring system. Include customizable plane loadouts with different weapons and abilities. Create a lobby system for match creation and team assignment. Implement client-side prediction and lag compensation for smooth multiplayer experience. Add mini-map showing player positions and objectives. Include replay system for match playback and highlight creation. Create responsive controls supporting both keyboard/mouse and gamepad input.