TS7031

Destructured value implicitly has any

Binding element 'name' implicitly has an 'any' type.

The compiler’s own words. Not translated — this is the string you pasted into a search box.

A destructuring pattern names a field, but the object containing that field has no known type.

Reproduction

function greet({ name }) {
  return name.toUpperCase()
}

The build asserts this emits exactly this code.

Why the compiler says this

The annotation belongs to the whole parameter pattern, not inside it. Until the container is typed, each extracted binding inherits the same missing information and becomes implicit `any`.

Fixes

function greet({ name }: { name: string }) {
  return name.toUpperCase()
}

Annotate the object pattern directly for a small one-off shape.

type Person = { name: string }

function greet({ name }: Person) {
  return name.toUpperCase()
}

Name the shape when it is shared or forms part of the public API.

Takeaway

Type the object being destructured; its bindings will then be inferred automatically.

Where to go next

Type aliases Try it in the Lab

Errors