There is a js proposal to add this to language: https://github.com/tc39/proposal-pipeline-operator https://github.com/tc39/proposal-pipeline-operator There are

There is a js proposal to add this to language: https://github.com/tc39/proposal-pipeline-operator https://github.com/tc39/proposal-pipeline-operator There are few exceptions (namespaces, enums) but typescript has been quite averse to adding non-standard language level features outside type annotations. This feature will likely come to ts after this proposal has been accepted for js.