bc518174
 王天杨
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"use strict";
exports.getTimezoneOffsetInMilliseconds = getTimezoneOffsetInMilliseconds;
var _index = require("../toDate.js");
/**
* Google Chrome as of 67.0.3396.87 introduced timezones with offset that includes seconds.
* They usually appear for dates that denote time before the timezones were introduced
* (e.g. for 'Europe/Prague' timezone the offset is GMT+00:57:44 before 1 October 1891
* and GMT+01:00:00 after that date)
*
* Date#getTimezoneOffset returns the offset in minutes and would return 57 for the example above,
* which would lead to incorrect calculations.
*
* This function returns the timezone offset in milliseconds that takes seconds in account.
*/
function getTimezoneOffsetInMilliseconds(date) {
const _date = (0, _index.toDate)(date);
const utcDate = new Date(
Date.UTC(
_date.getFullYear(),
_date.getMonth(),
_date.getDate(),
_date.getHours(),
_date.getMinutes(),
_date.getSeconds(),
_date.getMilliseconds(),
),
);
utcDate.setUTCFullYear(_date.getFullYear());
return +date - +utcDate;
}
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