Seems TS is provided by default (tho it will not do any type-checking, you'll need tsc --noEmit for that). As for JSX, you need a basic tsconfig that specifies

Seems TS is provided by default (tho it will not do any type-checking, you'll need tsc --noEmit for that). As for JSX, you need a basic tsconfig that specifies jsx. src: https://parceljs.org/typeScript.html https://parceljs.org/typeScript.html