TS7006: Parameter implicitly has an any type - in CI

By Daniel Zoghalchali·Latchkey

With noImplicitAny on, a parameter has no annotation and tsc cannot infer its type.

What this error means

Type-checking fails with TS7006 naming an unannotated parameter, commonly in a callback.

src/map.ts(4,18): error TS7006: Parameter 'item' implicitly has an 'any' type.

Common causes

How to fix it

Annotate the parameter

1. Add an explicit type to the parameter

items.map((item: Item) => item.id)

Give the surrounding value a type so inference works

1. Type the array/function so the callback parameter is inferred
2. Avoid blanket any to silence it

const items: Item[] = data
items.map((item) => item.id)

How to prevent it

• Keep noImplicitAny on and type containers so callbacks get contextual types automatically.

Frequently asked questions

Related guides

References

• Node.js documentation
• npm CLI documentation
• GitHub Actions documentation