TS2739

Object is missing required properties

Type '{}' is missing the following properties from type 'Point': x, y

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

The target type requires several members, and the supplied object has none of them.

Reproduction

interface Point {
  x: number
  y: number
}

const point: Point = {}

The build asserts this emits exactly this code.

Why the compiler says this

Structural typing checks the members that a value actually provides. An empty object cannot satisfy a contract promising readable numeric `x` and `y` properties, even if code intends to fill them later.

Fixes

interface Point {
  x: number
  y: number
}

const point: Point = { x: 0, y: 0 }

Create a complete value before giving it the complete type.

interface Point {
  x: number
  y: number
}

const draft: Partial<Point> = {}

Represent an incomplete construction phase explicitly with `Partial`.

Takeaway

A required property is a promise available immediately. Use a different draft type if the object is not ready yet.

Where to go next

Modifiers Try it in the Lab

Errors