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Use this to align rules with the senior-level structure (P0/P1/P2, scope, exceptions/tradeoffs).
fullstack ruleP2universalStack: TypeScript
typescripttype-guardsconsistency
Discriminate union members with type guards consistently
If you have a type guard for one variant of a union (isTvArticle), add guards for the other variants too rather than checking shapes ad hoc.
PR: hegnar-ws · org-mining-hist-2026-06Created: Jun 18, 2026
Bad example
Old codetypescript
| 1 | if (isTvArticle(item)) { ... } |
| 2 | else if ('frontpageTitle' in item) { ... } // ad hoc shape check |
Explanation (EN)
Objašnjenje (HR)
Good example
New codetypescript
| 1 | if (isTvArticle(item)) { ... } |
| 2 | else if (isFrontpageArticle(item)) { ... } |
Explanation (EN)
Objašnjenje (HR)