27 lines
595 B
JavaScript
27 lines
595 B
JavaScript
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'use strict';
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var $TypeError = require('es-errors/type');
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var ToIntegerOrInfinity = require('./ToIntegerOrInfinity');
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var isNaN = require('../helpers/isNaN');
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// https://262.ecma-international.org/15.0/#sec-makefullyear
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module.exports = function MakeFullYear(year) {
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if (typeof year !== 'number') {
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throw new $TypeError('Assertion failed: `year` must be a Number');
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}
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if (isNaN(year)) {
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return NaN; // step 1
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}
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var truncated = ToIntegerOrInfinity(year); // step 2
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if (0 <= truncated && truncated <= 99) {
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return 1900 + truncated; // step 3
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}
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return truncated; // step 4
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};
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