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Rule priority, scope & exceptions

Use this to align rules with the senior-level structure (P0/P1/P2, scope, exceptions/tradeoffs).

PriorityP2 — style, consistency, readabilityScopeUniversal — language-agnostic, broadly applicable

Exceptions / tradeoffs (EN)Iznimke / tradeoffi (HR)

frontend ruleP2universalStack: React

reactstateconsistencyclean-code

Use consistent empty/initial values for related pieces of state

Two related state values representing 'no selection' should use the same empty representation (both null or both '') so downstream checks behave uniformly.

PR: hegnar-zephr-components · org-mining-hist-2026-06Created: Jun 19, 2026

Bad example

Old codetsx

1	`const [selectedCategory, setSelectedCategory] = useState('');`
2	`const [selectedTicker, setSelectedTicker] = useState(null);`

Explanation (EN)

Objašnjenje (HR)

Good example

New codetsx

1	`const [selectedCategory, setSelectedCategory] = useState<string \| null>(null);`
2	`const [selectedTicker, setSelectedTicker] = useState<Ticker \| null>(null);`

Explanation (EN)

Objašnjenje (HR)

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