fix(utils): clone RegExp values with new RegExp instead of structuredClone (fix #19245, fix #18875)
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…turedClone` (fix vitejs#19245, fix vitejs#18875) - Jest appears to provide its own global `structuredClone` that modifies `RegExp`s in such a way that they fail `instanceof RegExp` checks, causing an error in a rollup plugin used by `vite` (and likely elsewhere). `new RegExp` seems to correctly clone `RegExp`s in Jest.
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RegExp values with new RegExp instead of structuredClone (fix #19245, fix #18875)RegExp values with new RegExp instead of structuredClone (fix #19245, fix #18875)
patak-dev
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Jan 21, 2025
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Fixes #19245. Fixes #18875.
Description
Jest appears to provide its own global
structuredClonethat modifiesRegExps in such a way that they failinstanceof RegExpchecks, causing an error in a rollup plugin used byvite(and likely other errors elsewhere). As suggested,new RegExpseems to correctly cloneRegExps in Jest.I thought about writing a test that modified the
structuredCloneglobal but decided against it as that's more like testing jest implementation detail rather than regexp cloning behaviour (which is already tested).