fix(webpack): use javascript/auto for js rule

[danielroe]

Types of changes

• Bug fix (a non-breaking change which fixes an issue)
• Breaking change (fix or feature that would cause existing functionality to change)

Description

Webpack 4 + .mjs dependencies currently causes an issue where that package's sub-dependencies are not imported in the correct context and the following error is generated (for example):

Can't reexport the named export [...] from non EcmaScript module (only default export is available)

This PR turns off webpack 4's .mjs handling to avoid broken dependencies. I expect this will be a temporary fix whilst the ecosystem moves to native ESM. Note that there is no such issue in webpack 5.

Checklist:

• All new and existing tests are passing.

[codecov-commenter]

Codecov Report

Merging #9180 (e15f438) into dev (6d1e217) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##              dev    #9180   +/-   ##
=======================================
  Coverage   65.10%   65.10%           
=======================================
  Files          94       94           
  Lines        4098     4098           
  Branches     1121     1121           
=======================================
  Hits         2668     2668           
  Misses       1152     1152           
  Partials      278      278           

Flag	Coverage Δ
unittests	65.10% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
packages/webpack/src/config/base.js	65.69% <ø> (ø)

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[pi0]

For supporting type: module packages, it probably makes sense to use js/auto for original babel rule (all transpiled files) (it was also needed in an attempt to migrate image runtume to modify babel rule.

[danielroe]

(Note, this is not sufficient to solve this issue when using with PNP.)

[dargmuesli]

Will there be a release including this change soon? :) Just wondering, I've been waiting for that since early June 🤩

[pi0]

Soon @dargmuesli with 2.16 (since is a risky change). In the meantime, you can try using nuxt-edge and feedback if working :)