fix: treat module as normal variable in ESM
#1260
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Pull Request Overview
This PR fixes the handling of the module variable in ES modules by preventing extra parser transformations when ESM syntax is present. The fix ensures that when building libraries in ESM format, the module variable is treated as a normal variable rather than being transformed by CommonJS-specific parsers.
- Updates JavaScript parser configuration to skip CommonJS exports handling in ESM context
- Adds comprehensive integration tests for
modulevariable handling in both ESM and CJS formats - Removes the
"type": "module"package.json field from a test to ensure proper testing of mixed environments
Reviewed Changes
Copilot reviewed 12 out of 29 changed files in this pull request and generated 2 comments.
Show a summary per file
| File | Description |
|---|---|
| packages/core/src/config.ts | Adds commonjs.exports: 'skipInEsm' parser option for ESM format |
| packages/core/tests/snapshots/config.test.ts.snap | Updates test snapshots to reflect new parser configuration |
| tests/integration/parser-javascript/module/ | New test suite with files to verify module variable handling in ESM vs CJS |
| tests/integration/parser-javascript/api-plugin/ | New test for API plugin parser behavior |
| tests/integration/format/index.test.ts | Updates existing test and adds new test case for module handling |
Files not reviewed (1)
- pnpm-lock.yaml: Language not supported
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|
@codex remove tests/integration/parser-javascript/api-plugin/src/cjsFile.cjs |
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Summary
Testing
|
Timeless0911
approved these changes
Oct 13, 2025
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Summary
second (final) step after web-infra-dev/rspack#11744.
forbid extra parser to handle
modulevar if ESM syntax is present, common usage and user expectation in package building.Related Links
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