Suggestion Backlog Slog, 8/30/2021

[andrewbranch]

• Feature Request: allow exclusion of node_modules when skipLibCheck is false #30511
  • shouldn't you just make your hand-authored .d.ts files .ts files?
    • Yes, probably. We currently have a fairly coherent posture that .d.ts files are not inputs—they don't get copied to outDir of a compilation. We probably wouldn’t change the .d.ts checking behavior without more broadly rethinking this position.
  • Action: leave issue open, remove from project board, update status on issue
• Use generic defaults for "empty" constructors of Array, Map, Set #29786
  • reason was to not be allowed to write Map<string>
    • wait, is that really that bad? Looks unexpected if you're not familiar with the type definition or coming from another language and assume Map keys are always stringy.
    • could we have two overloads, one with two mandatory type params?
      • no, because we couldn't get the default <any, any>, you get unknown
  • would this matter if we were ever allowed to have strict libs with unknown?
    • that might help a little
  • we traded one problem for another, maybe let's not undo it again
  • sometimes when you do subtype reduction you want to get rid of the any if there's something more informed to use
    • similar to typechecking of return types broken with try/catch when strictNullChecks and noImplicitAny are enabled #45592
  • Action: close issue/PR, not worth the flip flopping with potential breaks