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[Babel 8] Treat allowSuperOutsideMethod as top-level only#17505

Merged
nicolo-ribaudo merged 3 commits into
babel:mainbabel/babel:mainfrom
JLHwung:treat-allow-super-outside-method-as-toplevel-onlyJLHwung/babel:treat-allow-super-outside-method-as-toplevel-onlyCopy head branch name to clipboard
Sep 12, 2025
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[Babel 8] Treat allowSuperOutsideMethod as top-level only#17505
nicolo-ribaudo merged 3 commits into
babel:mainbabel/babel:mainfrom
JLHwung:treat-allow-super-outside-method-as-toplevel-onlyJLHwung/babel:treat-allow-super-outside-method-as-toplevel-onlyCopy head branch name to clipboard

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@JLHwung

@JLHwung JLHwung commented Sep 8, 2025 •
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Q                       A
Fixed Issues?
Patch: Bug Fix?
Major: Breaking Change? Yes
Minor: New Feature?
Tests Added + Pass? Yes
Documentation PR Link babel/website#3182
Any Dependency Changes?
License MIT

As a follow-up to #17203 (comment), in this PR we treat allowSuperOutsideMethod as top-level only in Babel 8. If this option is enabled, super() and super.property will be allowed in the top level.

The following productions will be invalid in Babel 8 even if allowSuperOutsideMethod is true:

class C extends B { method() { super(); } }
class C extends B { static { super(); } }
class C extends B { property = super(); }
function f() { super(); super.property; }

@JLHwung JLHwung added PR: Breaking Change 💥 A type of pull request used for our changelog categories for next major release pkg: parser PR: Needs Docs labels Sep 8, 2025
@JLHwung JLHwung changed the title Treat allowSuperOutsideMethod as top-level only [Babel 8] Treat allowSuperOutsideMethod as top-level only Sep 8, 2025
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babel-bot commented Sep 8, 2025 •
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Build successful! You can test your changes in the REPL here: https://babeljs.io/repl/build/59917

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pkg-pr-new Bot commented Sep 8, 2025 •
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commit: 08939f4

@JLHwung
JLHwung force-pushed the treat-allow-super-outside-method-as-toplevel-only branch from e6e3af3 to 08939f4 Compare September 8, 2025 16:21
@nicolo-ribaudo
nicolo-ribaudo merged commit e7031b7 into babel:main Sep 12, 2025
76 checks passed
@nicolo-ribaudo
nicolo-ribaudo deleted the treat-allow-super-outside-method-as-toplevel-only branch September 12, 2025 11:44
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@github-actions github-actions Bot added the outdated A closed issue/PR that is archived due to age. Recommended to make a new issue label Dec 13, 2025
@github-actions github-actions Bot locked as resolved and limited conversation to collaborators Dec 13, 2025
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@nicolo-ribaudo nicolo-ribaudo nicolo-ribaudo approved these changes
@liuxingbaoyu liuxingbaoyu liuxingbaoyu approved these changes

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outdated A closed issue/PR that is archived due to age. Recommended to make a new issue pkg: parser PR: Breaking Change 💥 A type of pull request used for our changelog categories for next major release

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@JLHwung @babel-bot @nicolo-ribaudo @liuxingbaoyu
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