fix: read the parse goal an embedded JavaScript body is handed out with

[alexander-akait]

Summary

as names which production of a language an embedded body is written in — a style="" arrives as css with as: "block-contents". JavaScript has two productions too, but the word reached the minimizer's options untranslated, and every built-in JavaScript engine rejects an unknown key outright: terser and uglify-js answer `as` is not a supported option, swc unknown field as``, esbuild Transform failed. So `as` could not be sent for JavaScript at all, and an inline `<script type="module">` was read as a classic script — a top-level `await` then being a build error rather than something to minify.

The four built-in JavaScript minimizers now read as as their own module option and strip it, so a module script is read as one and no engine is handed the word. A minify function of your own claiming javascript still receives it, as one claiming css does today.

What kind of change does this PR introduce?

fix

Did you add tests for your changes?

Yes — test/embedded-protocol.test.js gains a describe covering all four built-ins: a body handed out as a module is minified by each, one handed out as a classic script is reported as the syntax error it is (rather than as an unsupported option), and one handed out with no goal named is left to the minimizer's own default.

Does this PR introduce a breaking change?

No. as previously threw for JavaScript, so nothing depended on the old behaviour.

If relevant, what needs to be documented once your changes are merged or what have you already documented?

Documented in this PR — the Embedded source section of README.md gains the JavaScript half of the as paragraph.

Use of AI

Claude Code was used, driven by me. It read the four option builders and the renderEmbeddedSource dispatcher, measured each engine's response to as and to module before and after the change, wrote the tests and the README paragraph, and ran npm run lint and the full suite (579 tests, 825 snapshots, green). I reviewed the diff and the measurements.

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Generated by Claude Code

[changeset-bot]

🦋 Changeset detected

Latest commit: 9c1b9fc

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
minimizer-webpack-plugin	Patch

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 95.00%. Comparing base (a27c7fd) to head (9c1b9fc).

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #726      +/-   ##
==========================================
+ Coverage   94.91%   95.00%   +0.08%     
==========================================
  Files           4        4              
  Lines        1120     1120              
  Branches      391      391              
==========================================
+ Hits         1063     1064       +1     
+ Misses         50       49       -1     
  Partials        7        7              

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