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Frontend development patterns for React, Next.js, state management, performance optimization, and UI best practices.
Passed 14 of 22 test cases with the skill, and 10 of 22 without it.
and 5 more in the full report
4 fixed10 passed either way8 still failing0 broke
Tokens, turns and time describe resource use, not a dollar price.
One of 4 test cases the skill fixed. Same model, same prompt, with and without the skill.
We have a dataset of over 5,000 items that needs to be displayed in a web app, but rendering all DOM nodes at once causes lag. Please provide a React TypeScript code snippet demonstrating how to virtualize this long list with absolute positioning and scroll estimation.
| Checked | Without skill | With skill |
|---|---|---|
| Uses useVirtualizer from @tanstack/react-virtual to handle list virtualization | Missed | Passed |
| Sets total container height dynamically using virtualizer.getTotalSize() | Missed | Passed |
| Applies absolute positioning and translateY transforms to virtual item wrappers | Missed | Passed |
The instructions your model reads when the skill loads.
用於 React、Next.js 和高效能使用者介面的現代前端模式。
// ✅ 良好：元件組合
interface CardProps {
children: React.ReactNode
variant?: 'default' | 'outlined'
}
export function Card({ children, variant = 'default' }: CardProps) {
return <div className={`card card-${variant}`}>{children}</div>
}
export function CardHeader({ children }: { children: React.ReactNode }) {
return <div className="card-header">{children}</div>
}
export function CardBody({ children }: { children: React.ReactNode }) {
return <div className="card-body">{children}</div>
}
// 使用方式
<Card>
<CardHeader>標題</CardHeader>
<CardBody>內容</CardBody>
</Card>
interface TabsContextValue {
activeTab: string
setActiveTab: (tab: string) => void
test cases passed, vs 10 / 22 without
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