Kanban Task Board
Build a Kanban board with drag-and-drop cards, statuses, and saved progress
- HTML
- CSS
- Layouts
- JavaScript
- Drag and Drop
- Local Storage
- State Management
In this project, you will build a Kanban-style task board with multiple columns (for example: To Do, In Progress, Done) and draggable task cards that move between columns. Each card represents a task with a title and optional details. Your board must support creating new tasks, placing them into a starting column, and updating a card’s status by dragging it into another column.
The key requirement is persistence: tasks and their column positions must be saved between sessions using browser storage. When a user refreshes the page or returns later, the board should restore exactly as it was. Your implementation should keep the UI responsive, prevent broken drop zones, and make interactions obvious through clear hover/focus states and drop feedback.
Project Outcome and Practical Value
This project teaches the fundamentals of interactive stateful interfaces: you will manage a set of tasks, render them into columns, and keep the UI in sync with the underlying data model. Drag-and-drop forces you to think in terms of events, identifiers, and state transitions rather than static markup.
A Kanban board mirrors real product UI patterns used in workplace tools. Completing it builds credibility in interviews because it demonstrates interaction design, data persistence, and clean DOM updates - skills that are considered core for junior frontend developers.
What You Need Before You Start
You should feel confident with basic layouts and JavaScript-driven UI updates. The project expects you to structure data, respond to user actions, and store state in the browser without external libraries.
- Comfortable building multi-column layouts with CSS
- Understanding of DOM selection, events, and updates
- Working knowledge of HTML5 Drag and Drop or pointer-based alternatives
- Ability to serialize and parse data using JSON
- Familiarity with browser storage concepts (localStorage)
- Basic debugging in DevTools (console, elements, storage tabs)
Core Requirements for a Working Kanban Board
A strong solution behaves reliably under real usage: cards move where users expect, the board communicates valid drop zones, and the state survives refreshes without data corruption. These requirements reflect typical expectations for interactive UI exercises and help you practice production-style thinking.
| Requirement | Explanation |
| Three or more status columns | Columns establish the workflow model and make status transitions explicit in the UI. |
| Create and render task cards | Card creation proves you can transform user input into data and UI consistently. |
| Drag start, drag over, and drop handling | Proper event handling prevents broken drops and supports predictable movement between columns. |
| Drop zone feedback | Visual cues reduce user mistakes and make the interaction feel responsive and intentional. |
| Status updates tied to data, not DOM only | Data-driven status prevents UI from desyncing and simplifies persistence and re-rendering. |
| Persistent storage between sessions | Saving tasks to localStorage ensures the board restores after refresh and builds real app habits. |
| Stable identifiers for tasks | Unique IDs prevent collisions, enable reliable moves, and support future features like editing. |
| Graceful handling of empty columns | Empty states keep the UI usable and prevent layout collapse when tasks move out. |
Tips to Build It Like a Real UI
Start with the data model before you polish the UI. Define how tasks are stored (id, title, status, order) and treat the DOM as a rendering layer. Implement create, move, and persist operations one by one, verifying storage on every change. When drag-and-drop feels inconsistent, inspect event targets and keep drop handlers attached to column containers, not individual cards. When the data stays correct, the UI becomes easy to fix.
- Store tasks as an array of objects and re-render columns from state after every change
- Use a single source of truth for status and persist immediately after drop completes
- Add clear empty states so users understand where cards can be dropped
- Prevent accidental text selection and jitter by styling draggable elements intentionally
- Validate storage data on load to avoid breaking the board when JSON becomes corrupted
By completing this project, you'll learn how to build an interactive task board with reliable drag-and-drop behavior, clear status transitions, and persistent storage that restores the UI across sessions. This foundation strengthens your understanding of state-driven rendering, DOM event design, and practical frontend architecture, preparing you for larger applications such as dashboards, admin panels, and workflow tools used in real pro