All tracks
Track 01
Frontend Fundamentals
Vanilla JavaScript, DOM manipulation, CSS layout, event handling, and UI behavior. The core mechanics that every frontend engineer needs wired in before anything else.
0 / 8 solved
Module 01seeded3/3
HTML, DOM & Events
event handling, DOM manipulation, input binding
1
Problem 1·HTML, DOM & Events
Restricted Textarea
easyStart →
Problem 4·HTML, DOM & Events
Live Search Filter
easy
Problem 13·HTML, DOM & Events
Add Keyboard Navigation to Dropdown
medium
Module 03seeded1/3
CSS Layout & Responsive UI
card grids, responsive states, layout bugs
Problem 11·CSS Layout & Responsive UI
Responsive Card Grid
easy
Module 04seeded1/3
Accessibility
ARIA, keyboard, review/fix style problems
Problem 12·Accessibility
Fix Accessibility Issues in a Form
medium
Module 05seeded1/3
Browser Async & UI State
cooldown, loading states, stale interactions
Problem 9·Browser Async & UI State
Cooldown Button
medium
Module 06active2/3
Performance & Investigation
virtualized list, slow dashboard, DOM bottlenecks
Problem 10·Performance & Investigation
Virtualized List
hard
Problem 14·Performance & Investigation
Slow Dashboard — Find and Fix the Bottleneck
Capstonehard