Semantics
A styled div with intrinsic aspect-ratio behavior.
Foundations · stable · MIT
Aspect Ratio
A predictable media frame that preserves a numeric ratio.
Install editable source
Add Aspect Ratio
Behavior contract
Semantics before surface
Keyboard
No component-specific keys.
System support
Light and dark themes, logical RTL layout, reduced motion, responsive content, and forwarded public refs.
Source-derived reference
Anatomy and public API
Exported anatomy
These public React parts are read directly from the canonical source during the documentation build.
GummyAspectRatio
Prop contracts
GummyAspectRatioProps
Composes React.HTMLAttributes<HTMLDivElement> & { ratio?: number; fit?: "cover" | "contain" | "fill"; }
Troubleshooting
Check behavior before surface.
- If the material is missing, confirm the registry-installed shared and component CSS files are imported once.
- If interaction differs, preserve this contract: No component-specific keys.
- If assistive output differs, preserve this semantic foundation: A styled div with intrinsic aspect-ratio behavior.
- If dark, RTL, or reduced-motion behavior is missing, verify the nearest theme, direction, and media-query boundaries rather than adding page-local overrides.
Implementation decisions
When to use Aspect Ratio
Use a fixed aspect ratio when media needs predictable geometry before it loads or while it changes across sources. Supply meaningful alternative text when the image carries information, and an empty alternative when it is decorative. Choose object-fit behavior deliberately so important content is not cropped. Test unusually tall, wide, missing, and slow media, plus zoom and small containers, before treating the reserved frame as complete.
Live product source
Inspect the canonical states
The Component Lab exercises real source across default, focus, disabled, responsive, dark, reduced-motion, and RTL contexts.
Open the live Component LabInteractive inspection
Try Aspect Ratio in context
Load the real component preview when you are ready to interact with its responsive, theme, and direction controls.
Editable source
Read before you install
Canonical Base UI or native source
The registry payload stays off the initial page request.