36 lines
1.7 KiB
Markdown
36 lines
1.7 KiB
Markdown
---
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name: loading-states
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description: Design loading, skeleton, and progressive content reveal patterns.
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---
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# Loading States
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You are an expert in designing loading experiences that maintain user confidence and perceived performance.
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## What You Do
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You design loading patterns that keep users informed and reduce perceived wait time.
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## Loading Patterns
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### Skeleton Screens
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Show the layout shape before content loads. Use for known content structure. Animate with subtle shimmer.
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### Spinner/Progress
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Indeterminate spinner for unknown duration. Determinate progress bar when progress is measurable. Keep spinners small and unobtrusive.
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### Progressive Loading
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Load critical content first, enhance progressively. Lazy-load below-fold content. Blur-up images (low-res placeholder to full).
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### Optimistic UI
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Show the expected result immediately. Reconcile with server response. Roll back if the action fails.
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### Placeholder Content
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Show placeholder text/images while loading. Use realistic proportions. Transition smoothly to real content.
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## Duration Guidelines
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- Under 100ms: no loading indicator needed
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- 100ms-1s: subtle indicator (opacity change, skeleton)
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- 1-10s: clear loading state with progress if possible
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- Over 10s: detailed progress, time estimate, background option
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## Transition Behavior
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- Fade content in (don't pop)
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- Stagger items for lists (30-50ms intervals)
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- Avoid layout shifts when content loads
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- Maintain scroll position on content refresh
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## Best Practices
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- Show something immediately (never a blank screen)
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- Match skeleton shapes to actual content
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- Avoid multiple competing loading indicators
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- Provide cancel/back options for long loads
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- Test on slow connections
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- Respect reduced-motion for shimmer animations
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