Priority Board - Kanban Task Manager#

Project Overview##

Priority Board is a web-based Kanban task management application built as a single HTML file with embedded CSS and JavaScript. It serves as a personal productivity tool designed to organize tasks across different workflow stages using a visual board interface.

Technical Architecture##

Core Technologies###

• Frontend: Pure HTML5, CSS3, and vanilla JavaScript (ES6+)
• Styling Framework: Tailwind CSS (loaded via CDN)
• Icons: Lucide Icons (loaded via CDN)
• Data Persistence: Browser localStorage
• PWA Support: Service Worker and Web App Manifest (dynamically generated)

File Structure###

The application is contained in a single index.html file (approximately 400+ lines) with:

• HTML markup and templates
• Embedded CSS styles
• Embedded JavaScript application logic
• No external dependencies except CDN resources

User Interface Components##

Header Section###

• Large gradient title "Priority Board" with subtitle
• Tagline: "Your command center for everything that matters ✨"

Control Panel###

• Search input field with magnifying glass icon
• Category filter dropdown (All Categories, Work, Personal, Goals, Daily)
• Priority filter dropdown (All Priorities, High, Medium, Low)
• Toggle button for archived tasks visibility
• PWA install button (conditionally visible)

Kanban Board Layout###

Five predefined columns with distinct visual themes:

1. Backlog (📋) - Slate color scheme
2. Today (🎯) - Blue color scheme
3. In Progress (⚡) - Amber color scheme
4. Waiting (⏳) - Purple color scheme
5. Done (✅) - Green color scheme

Task Cards###

Two display modes per task:

• View Mode: Shows title, description, category badge, priority indicator, due date
• Edit Mode: Form with inputs for all task properties

Statistics Footer###

Four metric displays:

• Total Active tasks
• Completed tasks
• Today's Focus tasks
• Archived tasks

Data Model and State Management##

Task Object Structure###

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Application State###

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Categories Configuration###

• Work: Blue theme, 💼 emoji
• Personal: Emerald theme, 🏠 emoji
• Goals: Purple theme, 🎯 emoji
• Daily: Orange theme, 📅 emoji

Priority Levels###

• High: Red theme, 🔴 icon, red left border
• Medium: Yellow theme, 🟡 icon, yellow left border
• Low: Green theme, 🟢 icon, green left border

Core Functionality##

Task Management Operations###

• Create: Add new tasks to any column
• Read: Display tasks in card format
• Update: In-place editing of all task properties
• Delete: Remove tasks permanently
• Archive: Move completed tasks to archived state
• Move: Drag-and-drop between columns

Filtering and Search###

• Text search across task titles and descriptions (case-insensitive)
• Category-based filtering
• Priority-based filtering
• Archive visibility toggle
• Real-time filtering without page refresh

Drag and Drop###

• Tasks are draggable between columns
• Visual feedback during drag operations (opacity change)
• Drop zones accept tasks from any column
• Column changes persist automatically

Visual Design and Styling##

Design System###

• Color Palette: Blue-purple gradient branding, category-specific colors
• Typography: Various font weights from light to black, tracking adjustments
• Layout: Flexbox-based responsive design
• Spacing: Consistent padding and margin scale
• Shadows: Multiple shadow levels for depth
• Borders: Rounded corners throughout (xl radius common)

Interactive Elements###

• Hover effects on buttons and cards
• Scale transforms on button interactions
• Color transitions on state changes
• Pulse animations for overdue tasks
• Backdrop blur effects on control panels

Responsive Features###

• Horizontal scroll for kanban board on smaller screens
• Flexible grid layouts for statistics
• Consistent sizing across different screen sizes

Data Persistence##

Storage Mechanism###

• Uses browser localStorage with key 'kanban-tasks'
• JSON serialization of task array
• Automatic save on all state changes
• Data loads on application initialization

Data Operations###

• saveTasks(): Writes current state to localStorage
• loadTasks(): Reads and parses data from localStorage
• saveAndRender(): Combined save and UI update operation

Progressive Web App Features##

PWA Capabilities###

• Dynamically generated Web App Manifest
• Service Worker for caching (basic cache-first strategy)
• Install prompt handling
• Standalone display mode support
• Theme color and background color definitions

Installation Flow###

• Listens for 'beforeinstallprompt' event
• Shows install button when prompt available
• Handles user choice and hides button on acceptance

Offline Support###

• Service Worker caches essential resources
• Basic offline functionality for cached content

Event Handling and User Interactions##

Event Types Handled###

• DOM content loaded initialization
• Input field changes (search, filters)
• Button clicks (add, edit, delete, archive)
• Drag and drop events
• Form submissions (task editing)
• PWA install prompts

State Updates###

• All user actions trigger state updates
• State changes automatically persist and re-render
• No manual save required from user perspective

Performance Characteristics##

Rendering Strategy###

• Complete re-render on state changes
• Template-based DOM element creation
• Icon re-initialization after DOM updates
• No virtual DOM or differential rendering

Memory Usage###

• All data stored in JavaScript memory during session
• localStorage for persistence between sessions
• No external API calls or network dependencies

Browser Compatibility Requirements##

• Modern browser support (ES6+ features)
• localStorage API support
• Service Worker API for PWA features
• Drag and drop API support
• CSS Grid and Flexbox support

This project represents a complete, self-contained task management solution suitable for personal productivity workflows, built with modern web technologies while maintaining simplicity and offline capability.