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Use this to align rules with the senior-level structure (P0/P1/P2, scope, exceptions/tradeoffs).
frontend ruleP1universalStack: TypeScript
type-safetynull-handlingcorrectness
Use nullish coalescing so a value matches its declared null type
If a getter is typed string | null, optional chaining alone can yield undefined; add ?? null so the runtime value matches the type.
PR: hegnar-ws · org-mining-hist-2026-06Created: Jun 18, 2026
Bad example
Old codetypescript
| 1 | public get leadImageUrl(): string | null { |
| 2 | return this.leadImage?.originalUrl; // can be undefined |
| 3 | } |
Explanation (EN)
Objašnjenje (HR)
Good example
New codetypescript
| 1 | public get leadImageUrl(): string | null { |
| 2 | return this.leadImage?.originalUrl ?? null; |
| 3 | } |
Explanation (EN)
Objašnjenje (HR)