Fix formatPlainTime locale handling and improve test coverage - #46
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| export function formatPlainTime(date = new Date(), timeZone = getTimeZone()) { | ||
| const timeZonedDate = new Date(date.toLocaleString(undefined, { timeZone })); |
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This function is not pure when the parameter is undefined. The returned date string can depend on browser user settings.
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Jul 20, 2026
formatPlainTime locale handling and improve test coverage
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Summary
formatPlainTimereturning"NaN:NaN:NaN"under dd/mm/yyyy runtime locales (e.g.en-GB) when the day is > 12, by pinning the locale used in itstoLocaleStringround-trip toen-US.en-USanden-GB(test:en-US/test:en-GB, both invoked bynpm test) to catch this class of locale regression going forward.package.json#files(drop.npmignore), and verify thenpm packoutput against that whitelist inindex.dist.test.ts.Test plan
npm run test:en-USnpm run test:en-GBnpm run lint