"files.exclude" does not match double-extension files with "when": "$(basename).ext"

[nickspoons]

It is not possible to match files with a double-extension using "$(basename).ext", i.e. ".js.map" or ".min.css".
You can currently workaround matching ".js.map" files by excluding the extention in the "when":

{
   "files.exclude": {
      "**/*.js": { "when": "$(basename).ts"},
      "**/*.js.map": { "when": "$(basename).ts"},   // Does nothing
      "**/*.js.map": { "when": "$(basename)"},      // Works
      "**/*.css": { "when": "$(basename).scss"},
      "**/*.min.css": { "when": "$(basename).scss"} // Does nothing
   }
}

Ideally I would like to use "when": "$(basename).ext" to exclude ".js" and ".js.map" transpiled Typescript files, and ".css" and ".min.css" transpiled and minified Sass or Less files:

{
   "files.exclude": {
      "**/*.js": { "when": "$(basename).ts"},
      "**/*.js.map": { "when": "$(basename).ts"},
      "**/*.css": { "when": "$(basename).scss"},
      "**/*.min.css": { "when": "$(basename).scss"}
   }
}

This issue could possibly be resolved by allowing regex expressions, as described in #1214

[bpasero]

@nickspoons I am not sure how this would work even if #1214 gets implemented. You have a file something.min.css so the $(basename) will resolve to something.min. What you actually want to use is a $(filename) that would resolve to something so that you can type something. scss, e.g.:

{
   "files.exclude": {
      "**/*.min.css": { "when": "$(filename).scss"}
   }
}

Would you agree?

[bpasero]

marking as duplicate of #4642