fix(build): Prevent Rollup from adding [Symbol.toStringTag]: 'Module' to CJS files
#6043
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lobsterkatie
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AbhiPrasad
approved these changes
Oct 27, 2022
Lms24
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Oct 27, 2022
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Nice detective work! |
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Gonna merge this in so we can unblock release. |
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As of version 2.69.0, setting
output.generatedCodeto'es2015'(as we do) causes Rollup to add[Symbol.toStringTag]: 'Module'to generated CJS files. Though this is valid ES6, it causes Jest to be unable to mock our generated packages.Though a PR has been opened to fix this, the change almost certainly won't be backported, so anyone using Jest 29.2.2 or under will run into this problem if they try to mock
@sentry/xxx7.16. (The relevant change was introduced in #5951, when we (semi-)accidentally upgraded Rollup from 2.67.1 to 2.78.0, and was first included in version 7.16.)This PR prevents the new Rollup behavior, since it has no known benefit. (The Rollup docs say that presence of the
'Module'toStringTag "is used for feature detection in certain libraries and frameworks," but not having it hasn't seemed to hurt us so far.)Fixes #5994.
Fixes #6037.