foundation
Flexbox Visualizer
Interactive flex playground for axes, alignment, wrapping, and gaps.
Learning checklist
- Main vs cross axis
- gap, wrap, and ordering
- Alignment across breakpoints
Definition
Interactive flex playground for axes, alignment, wrapping, and gaps.
Syntax
Example
Deep dive
Why this matters
Principles, mental models, and debugging clues tailored to the topic.
Visual intuition
Each property is paired with motion or color feedback so you build muscle memory, not just recall syntax.
Copy-ready CSS
Controls emit exact CSS you can copy. Use it as a starter token or paste into DevTools for instant validation.
Performance notes
Learn where reflow, repaint, or compositing occurs so you avoid jank and choose GPU-friendly paths.
Accessibility first
Focus-visible, reduced-motion, and contrast tips are woven into every lab to keep experiences inclusive.
Practice
Try recreating a UI card using this topic. Toggle between dark and light modes to validate token contrast and responsiveness.
Tip: use DevTools overlays (grid/flex) plus the copy CSS button.
Flexbox Visualizer
Manipulate axes, spacing, and wrapping. Drag the blocks to see how flex recalculates layout on the fly.
Drag tiles to reorder; wrapping and axis settings will reflow the layout instantly.
Related topics
Keep exploring adjacent concepts.