When to Use Flexbox
Flexbox excels at component-level micro-layouts where elements should flow according to their content size: navigation bars with spaced brand logos and button links, pill badges, and vertical form stacks.
Use justify-content and align-items to achieve effortless alignment.
When to Use CSS Grid
CSS Grid is the undisputed champion for macro page layouts and card collections.
With grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)), you create responsive product catalogs and dashboard widgets that automatically reorganize without writing a single media query breakpoint.
Step-by-Step Tutorial
Determine Layout Dimensionality
If alignment is strictly linear, choose Flexbox. If rows must align with adjacent columns, choose CSS Grid.
Apply Gap Property for Gutters
Use standard gap properties instead of complex margin hacks to space items cleanly.
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Frequently Asked Questions
Can I nest Flexbox inside a CSS Grid container?
Yes! Combining CSS Grid for the outer page grid and Flexbox for internal card headers and footers is industry standard practice.
Does CSS Grid have performance drawbacks compared to Flexbox?
Modern browser layout engines optimize both equally well. However, avoiding deeply nested grid definitions prevents layout recalculation reflows.