Modern CSS offers two powerful layout systems: Flexbox and Grid. Both are essential tools, but knowing when to use each can significantly improve your code quality.
Flexbox is ideal for one-dimensional layouts - either a row or a column. Use it for navigation bars, card lists, centering content, and form layouts where elements need to grow or shrink dynamically.
CSS Grid excels at two-dimensional layouts where you need control over both rows and columns. Think dashboard layouts, magazine-style pages, and complex responsive designs.
Key Differences:
- Flexbox works on a single axis at a time; Grid works on both axes simultaneously
- Flexbox is content-first (items determine layout); Grid is layout-first (grid defines placement)
- Grid provides explicit gap control with
grid-gap
When to Use Flexbox: Navigation menus, toolbars, card layouts, centering, form rows When to Use Grid: Page layouts, image galleries, dashboards, complex responsive designs
Pro tip: You can nest Flexbox inside Grid (and vice versa) for truly flexible layouts.