Declaration mapping

[Indy-rbo]

Description

To improve the Developer Experience I'd love to have it so that clicking on an imported dependency opens the actual file, instead of opening a *.d.ts file only showing the type declarations.

There is the declarationMap setting for tsconfig.json which states:

Generates a source map for .d.ts files which map back to the original .ts source file. This will allow editors such as VS Code to go to the original .ts file when using features like Go to Definition.

You should strongly consider turning this on if you’re using project references.

But setting that locally didn't seem to change anything for me.
Should this already be possible to do? Otherwise I would like to request the Build Tools to do this for us.

[Michaelpalacce]

Taking this one, I want to research it

[Michaelpalacce]

So I took a look at it.

From what I could see, we do generate the maps you need for this to work, the problem is the way we bundle things.

1. Currently, we bundle only the definitions as there is no point in bundling the actual source files themselves. This is actually a practice in ts development, to just provide the types rather than the whole source code and have the source code as a normal dependency. There is however the option to bundle them together as well, which brings me to:
2. In order for this to work, we'll need to add the source files as well as the mapping inside of the definitions.
3. It's not as simple as copy pasting things in the right place, as the structure needs to be kept in mind

We'll need to triage internally :)