fix: SyntaxError Unexpected token export in importing babel runtime helper

[ymmooot]

Types of changes

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

Description

If useESModules option of @babel/plugin-transform-runtime is true, browser can not parse the export.

Resolves: #5400

Checklist:

• My change requires a change to the documentation.
• I have updated the documentation accordingly. (PR: #)
• I have added tests to cover my changes (if not applicable, please state why)
• All new and existing tests are passing.

[codecov-io]

Codecov Report

Merging #5401 into dev will decrease coverage by 0.04%.
The diff coverage is n/a.

@@            Coverage Diff            @@
##              dev   #5401      +/-   ##
=========================================
- Coverage   96.05%     96%   -0.05%     
=========================================
  Files          74      74              
  Lines        2532    2529       -3     
  Branches      641     640       -1     
=========================================
- Hits         2432    2428       -4     
- Misses         84      85       +1     
  Partials       16      16

Impacted Files	Coverage Δ
packages/babel-preset-app/src/index.js	100% <ø> (ø)	⬆️
packages/vue-renderer/src/renderer.js	95.52% <0%> (-0.5%)	⬇️
packages/webpack/src/config/server.js	100% <0%> (ø)	⬆️

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[clarkdo]

The useESModules should be true since webpack will process it as babel doc described https://babeljs.io/docs/en/babel-plugin-transform-runtime#useesmodules

I think your issue may be because some other reason, could you provide a repo in the issue?

[ymmooot]

@clarkdo
Here is the repository reproducing the issue 🙏
https://github.com/ymmooot/reproduce-5400

[kiaking]

@ymmooot @clarkdo As I mentioned at #5400, when setting mode to spa this will work. So I'm guessing this is not the client side error. It should be happening at node side.

[clarkdo]

LGTM, wait for CI passing