lix-website/themes/lix/assets/bootstrap/node_modules/es-abstract/2022/TimeZoneString.js
2024-04-26 22:49:34 -06:00

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'use strict';
var GetIntrinsic = require('get-intrinsic');
var $Date = GetIntrinsic('%Date%');
var $TypeError = require('es-errors/type');
var isNaN = require('../helpers/isNaN');
var callBound = require('call-bind/callBound');
var $indexOf = callBound('String.prototype.indexOf');
var $slice = callBound('String.prototype.slice');
var $toTimeString = callBound('Date.prototype.toTimeString');
// https://262.ecma-international.org/13.0/#sec-timezoneestring
module.exports = function TimeZoneString(tv) {
if (typeof tv !== 'number' || isNaN(tv)) {
throw new $TypeError('Assertion failed: `tv` must be a non-NaN Number');
}
// 1. Let offset be LocalTZA(tv, true).
// 2. If offset is +0𝔽 or offset > +0𝔽, then
// a. Let offsetSign be "+".
// b. Let absOffset be offset.
// 3. Else,
// a. Let offsetSign be "-".
// b. Let absOffset be -offset.
// 4. Let offsetMin be ToZeroPaddedDecimalString((MinFromTime(absOffset)), 2).
// 5. Let offsetHour be ToZeroPaddedDecimalString((HourFromTime(absOffset)), 2).
// 6. Let tzName be an implementation-defined string that is either the empty String or the string-concatenation of the code unit 0x0020 (SPACE), the code unit 0x0028 (LEFT PARENTHESIS), an implementation-defined timezone name, and the code unit 0x0029 (RIGHT PARENTHESIS).
// 7. Return the string-concatenation of offsetSign, offsetHour, offsetMin, and tzName.
// hack until LocalTZA, and "implementation-defined string" are available
var ts = $toTimeString(new $Date(tv));
return $slice(ts, $indexOf(ts, '(') + 1, $indexOf(ts, ')'));
};