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18 lines
530 B
18 lines
530 B
'use strict'; |
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var callBind = require('call-bind'); |
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var I402 = typeof Intl === 'undefined' ? null : Intl; |
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var DateTimeFormat = !!I402 && I402.DateTimeFormat; |
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var resolvedOptions = !!DateTimeFormat && callBind(DateTimeFormat.prototype.resolvedOptions); |
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// https://262.ecma-international.org/15.0/#sec-systemtimezoneidentifier |
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module.exports = function SystemTimeZoneIdentifier() { |
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if (DateTimeFormat && resolvedOptions) { |
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return resolvedOptions(new DateTimeFormat()).timeZone; // steps 2 - 3 |
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} |
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return 'UTC'; // step 1 |
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};
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