This is a proposed feature in TypeScript, under the legendary Issue #16
It won't be introduced into TypeScript until the ECMAScript spec for this feature is firm as there is a desire for the TypeScript implementation to follow that specification - so you'll get it early, but not massively early in this case.
It is referred to as any of the following:
- Null Propagation Operator
- Existential Operator
- Null Coalesce Operator
