`date-fns@3.6.0` failures in `typescript` and `parcel` builds and runtime

[isakstarlander]

🐛 bug report

After upgrading date-fns to version 3.6.0 the parcel build started failing, not finding the exported functions. Apart from that the runtime function calls in the dev server fails with provided errors documented in the reproduction repository.

This seems to be a problem for parcel builds in particular, a related issue in date-fns can be found here: https://github.com/date-fns/date-fns/issues/3744

🤔 Expected Behavior

Build should be successful and runtime function calls should work as described in the date-fns repository.

😯 Current Behavior

Build fails unless specifying the alias function name. Runtime the format function throws an error.

Build error:

@parcel/core: node_modules/date-fns/index.mjs does not export 'format'

  /Users/isakstarlander/git/date-fns-parcel-reproduction/formatImport.ts:17:10
    16 | 
  > 17 | import { format } from "date-fns";
  >    |          ^^^^^^
    18 | 
    19 | function renderFormattedDate() {

Runtime error:

TypeError: Cannot read properties of undefined (reading 'y')
    at format.mjs:378:21
    at Array.map (<anonymous>)
    at format (format.mjs:367:6)
    at renderFormattedDate (formatImport.ts:10:26)
    at ghM9m.date-fns (formatImport.ts:21:1)
    at newRequire (index.0dd3d9d0.js:71:24)
    at index.0dd3d9d0.js:122:5
    at index.0dd3d9d0.js:145:3

🔦 Context

This issue prevents us from upgrading date-fns to the latest supported major version.

💻 Code Sample

Reproduction repository: https://github.com/Milkywire/date-fns-parcel-reproduction

🌍 Your Environment

Software	Version(s)
Parcel	2.12.0
date-fns	3.6.0
Node	18
Operating System	MacOS

[Poky85]

In the meantime this is workaround:

import format from 'date-fns/format';