Constnium/node_modules/es-abstract/2019/InLeapYear.js
2022-06-23 02:27:43 +02:00

21 lines
510 B
JavaScript

'use strict';
var GetIntrinsic = require('get-intrinsic');
var $EvalError = GetIntrinsic('%EvalError%');
var DaysInYear = require('./DaysInYear');
var YearFromTime = require('./YearFromTime');
// https://262.ecma-international.org/5.1/#sec-15.9.1.3
module.exports = function InLeapYear(t) {
var days = DaysInYear(YearFromTime(t));
if (days === 365) {
return 0;
}
if (days === 366) {
return 1;
}
throw new $EvalError('Assertion failed: there are not 365 or 366 days in a year, got: ' + days);
};