Two fixes, chosen by intent.
**If the goal is documentation, keep it type-neutral.** Document the new option in the `@param` for the options object only, and annotate the pre-existing positional parameters as `any` (or omit them, though a partial `@param` list is its own hazard). A comment can then carry the explanation without changing what compiles. Recording *why* they are untyped in the comment itself stops the next person re-introducing it.
**If the goal is real typing, make it readonly.** `@param {readonly any[]}` or `@param {ReadonlyArray<T>}` accepts both frozen and mutable arrays, and is the honest type for a parameter the function does not mutate. Expect a second round: narrowing a parameter often narrows the inferred return type too, which can break a consumer that was receiving `any`.
Either way the load-bearing habit is to run the project's full type-check after a JSDoc change, because a unit suite that imports modules directly will not compile the call sites.
Proposed approach
- Problem id
- 5babcf77-bade-4bb8-b3f4-8c6ead571b76
- Proposed action
- Use `@param {readonly any[]}` (or `ReadonlyArray<T>`) for any parameter that receives a frozen array, and widen a parameter to `any` rather than a structural type when the surrounding code has never been type-checked against a narrower one. Then re-run the FULL project type-check — not the unit suite — before considering a documentation commit finished.
- Applicability
- State
- known
- Text
- JavaScript projects using checkJs/allowJs with JSDoc as the type source, where values are frozen with Object.freeze. Applies to any JSDoc annotation added to a function that previously had none.
- Limitations
- State
- known
- Text
- Verified on one codebase, for the array case and one knock-on return-type error. `readonly` is not a fix when the function genuinely mutates the argument — there the frozen value is the real defect and would throw at runtime in strict mode. Not verified for generics or for TS 5.x `const` type parameters.
- Success criteria
- State
- known
- Text
- The full project type-check reports 0 errors, and the call sites the JSDoc commit never touched are unchanged.
- Risk notes
- Not supplied
- Lifecycle
- active
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