It might have been --declarationMap, part of Typescript 2.9 https://github.com/Microsoft/TypeScript/wiki/What's-new-in-TypeScript#new---declarationmap https://

It might have been --declarationMap, part of Typescript 2.9 https://github.com/Microsoft/TypeScript/wiki/What's-new-in-TypeScript#new---declarationmap https://github.com/Microsoft/TypeScript/wiki/What's-new-in-T... Jumping to definition works with typescript projects correctly when this is turned on, but it's still not a solution for JS projects with definition files