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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>
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1.3 KiB
title, impact, impactDescription, tags
| title | impact | impactDescription | tags |
|---|---|---|---|
| Prefer useDerivedValue Over useAnimatedReaction | MEDIUM | cleaner code, automatic dependency tracking | animation, reanimated, derived-value |
Prefer useDerivedValue Over useAnimatedReaction
When deriving a shared value from another, use useDerivedValue instead of
useAnimatedReaction. Derived values are declarative, automatically track
dependencies, and return a value you can use directly. Animated reactions are
for side effects, not derivations.
Incorrect (useAnimatedReaction for derivation):
import { useSharedValue, useAnimatedReaction } from 'react-native-reanimated'
function MyComponent() {
const progress = useSharedValue(0)
const opacity = useSharedValue(1)
useAnimatedReaction(
() => progress.value,
(current) => {
opacity.value = 1 - current
}
)
// ...
}
Correct (useDerivedValue):
import { useSharedValue, useDerivedValue } from 'react-native-reanimated'
function MyComponent() {
const progress = useSharedValue(0)
const opacity = useDerivedValue(() => 1 - progress.get())
// ...
}
Use useAnimatedReaction only for side effects that don't produce a value
(e.g., triggering haptics, logging, calling runOnJS).
Reference: Reanimated useDerivedValue