Functions

ThisType

Provides a contextual `this` type inside an object literal.

What it is

A marker interface with no members and compiler-defined meaning. Intersect it into the contextual type of an object’s methods and those method bodies see `this` as the supplied data-and-method shape. The marker itself contributes no property to the resulting value.

Examples

```
(typeof point)["x"]
```
→number
```
ReturnType<typeof point.move>
```
→number
```
Parameters<typeof point.move>
```
→[dx: number, dy: number]
The contextual receiver never becomes an ordinary parameter.

Each resolved type above was printed by TypeScript 6.0.3, not written by hand.

What it does not do

It does not transform or return a useful standalone type. Its effect appears only while an object literal is contextually checked.
It requires `noImplicitThis` (included by `strict`) for the contextual receiver checking to matter.

Takeaway

`ThisType<T>` is an instruction to contextual checking, not a normal type transform; its proof is what method bodies may do with `this`.