Bootstrap Interview Prep Full
4 min read Quiz at the end
Interview tips: 12-column grid, breakpoints, jQuery removed, Sass variables, ARIA, Utility API.
Full Interview Guide
- 12-column grid — allows flexible halves (6), thirds (4), quarters (3)
- Mobile-first — base styles for small; min-width media queries for larger
- Bootstrap 5 vs 4 — v5 dropped jQuery; uses vanilla JS; new utilities; RTL support
- data-bs- — prefix for all Bootstrap 5 JS component data attributes
- Sass customization — override variables BEFORE @import bootstrap
- container-fluid — always 100% width; container has fixed max-widths
- d-none d-md-block — hide on mobile, show on md+ screens
- visually-hidden — accessible but visually invisible (screen readers only)
- Utility API — generate custom utility classes via $utilities Sass map