19 lines
526 B
JavaScript
19 lines
526 B
JavaScript
'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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