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Rule priority, scope & exceptions
Use this to align rules with the senior-level structure (P0/P1/P2, scope, exceptions/tradeoffs).
backend ruleP2universalStack: TypeScript
api-designnull-handlinggraceful-degradation
Return the best available data instead of null when you can
When a derived value cannot be fully computed, prefer returning a sensible fallback (e.g. lastUpdated or now) over null, so consumers still get useful information.
PR: hegnar-user-ws · org-mining-hist-2026-06Created: Jun 18, 2026
Bad example
Old codetypescript
| 1 | const market = marketplaces.find((m) => m.insref === instrument.marketplace); |
| 2 | if (!market) { |
| 3 | return null; |
| 4 | } |
Explanation (EN)
Objašnjenje (HR)
Good example
New codetypescript
| 1 | const market = marketplaces.find((m) => m.insref === instrument.marketplace); |
| 2 | if (!market) { |
| 3 | return lastUpdated; // still return useful info |
| 4 | } |
Explanation (EN)
Objašnjenje (HR)