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Permissive Unicode #542

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strager opened this issue Nov 26, 2021 · 1 comment
Open

Permissive Unicode #542

strager opened this issue Nov 26, 2021 · 1 comment
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false positive Severe bug: quick-lint-js rejects valid code

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@strager
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strager commented Nov 26, 2021

Unicode 14 allows more code points in JavaScript identifiers. (See #538 for discovery.)

We should audit Unicode versions to see if any version restricted identifiers. quick-lint-js should allow code which worked in older browsers.

Further, we could have an option to report code points which might not be compatible with some browsers. I.e. we could have two is-identifier tables: allowed in any standard, and allowed in all standards.
@strager strager added the false positive Severe bug: quick-lint-js rejects valid code label Nov 26, 2021
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strager commented Dec 2, 2021

Example of a character which was valid in ES5 but is no longer valid: evanw/esbuild#1599

@strager strager mentioned this issue Apr 15, 2022
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