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Pulled ALL skills from 15 source repositories: - anthropics/skills: 16 (docs, design, MCP, testing) - obra/superpowers: 14 (TDD, debugging, agents, planning) - coreyhaines31/marketingskills: 25 (marketing, CRO, SEO, growth) - better-auth/skills: 5 (auth patterns) - vercel-labs/agent-skills: 5 (React, design, Vercel) - antfu/skills: 16 (Vue, Vite, Vitest, pnpm, Turborepo) - Plus 13 individual skills from various repos Mosaic Stack is not limited to coding — the Orchestrator and subagents serve coding, business, design, marketing, writing, logistics, analysis, and more. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
67 lines
1.6 KiB
Markdown
67 lines
1.6 KiB
Markdown
---
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title: Use expo-image for Optimized Images
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impact: HIGH
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impactDescription: memory efficiency, caching, blurhash placeholders, progressive loading
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tags: images, performance, expo-image, ui
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---
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## Use expo-image for Optimized Images
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Use `expo-image` instead of React Native's `Image`. It provides memory-efficient caching, blurhash placeholders, progressive loading, and better performance for lists.
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**Incorrect (React Native Image):**
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```tsx
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import { Image } from 'react-native'
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function Avatar({ url }: { url: string }) {
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return <Image source={{ uri: url }} style={styles.avatar} />
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}
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```
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**Correct (expo-image):**
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```tsx
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import { Image } from 'expo-image'
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function Avatar({ url }: { url: string }) {
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return <Image source={{ uri: url }} style={styles.avatar} />
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}
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```
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**With blurhash placeholder:**
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```tsx
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<Image
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source={{ uri: url }}
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placeholder={{ blurhash: 'LGF5]+Yk^6#M@-5c,1J5@[or[Q6.' }}
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contentFit="cover"
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transition={200}
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style={styles.image}
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/>
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```
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**With priority and caching:**
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```tsx
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<Image
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source={{ uri: url }}
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priority="high"
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cachePolicy="memory-disk"
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style={styles.hero}
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/>
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```
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**Key props:**
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- `placeholder` — Blurhash or thumbnail while loading
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- `contentFit` — `cover`, `contain`, `fill`, `scale-down`
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- `transition` — Fade-in duration (ms)
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- `priority` — `low`, `normal`, `high`
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- `cachePolicy` — `memory`, `disk`, `memory-disk`, `none`
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- `recyclingKey` — Unique key for list recycling
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For cross-platform (web + native), use `SolitoImage` from `solito/image` which uses `expo-image` under the hood.
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Reference: [expo-image](https://docs.expo.dev/versions/latest/sdk/image/)
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