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Original file line number | Diff line number | Diff line change |
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@@ -0,0 +1,27 @@ | ||
import dayjs from 'dayjs'; | ||
import timezone from 'dayjs/plugin/timezone'; | ||
import utc from 'dayjs/plugin/utc'; | ||
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dayjs.extend(utc); | ||
dayjs.extend(timezone); | ||
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const history = new Map<string, boolean>(); | ||
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export function isValidTimeZone(tz: string) { | ||
if (history.has(tz)) { | ||
return history.get(tz); | ||
} | ||
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let status: boolean; | ||
try { | ||
Intl.DateTimeFormat(undefined, { timeZone: tz }); | ||
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status = true; | ||
} catch { | ||
status = false; | ||
} | ||
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history.set(tz, status); | ||
|
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return status; | ||
} |
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