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Rule priority, scope & exceptions
Use this to align rules with the senior-level structure (P0/P1/P2, scope, exceptions/tradeoffs).
frontend ruleP2universalStack: React
dryrenderingkeys
Derive iteration count from the data, not a duplicated magic number
Map over the actual array instead of Array.from({length: N}) indexing into it, so the two can't drift out of sync.
PR: hegnar-zephr-components · org-mining-hist-2026-06Created: Jun 19, 2026
Bad example
Old codetsx
| 1 | const ROWS = ['a','b','c']; |
| 2 | {Array.from({ length: 3 }).map((_, i) => <div key={ROWS[i]} />)} |
Explanation (EN)
Objašnjenje (HR)
Good example
New codetsx
| 1 | const ROWS = ['a','b','c']; |
| 2 | {ROWS.map((key) => <div key={key} />)} |
Explanation (EN)
Objašnjenje (HR)