main
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Last change
on this file since d565449 was d565449, checked in by stefan toskovski <stefantoska84@…>, 4 weeks ago |
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Update repo after prototype presentation
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-
Property mode
set to
100644
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File size:
770 bytes
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| [d565449] | 1 | 'use strict';
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| 2 |
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| 3 | var $TypeError = require('es-errors/type');
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| 4 |
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| 5 | var isNaN = require('../../helpers/isNaN');
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| 6 |
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| 7 | // https://262.ecma-international.org/11.0/#sec-numeric-types-number-multiply
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| 8 |
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| 9 | module.exports = function NumberMultiply(x, y) {
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| 10 | if (typeof x !== 'number' || typeof y !== 'number') {
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| 11 | throw new $TypeError('Assertion failed: `x` and `y` arguments must be Numbers');
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| 12 | }
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| 13 |
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| 14 | if (isNaN(x) || isNaN(y) || (x === 0 && !isFinite(y)) || (!isFinite(x) && y === 0)) {
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| 15 | return NaN;
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| 16 | }
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| 17 | if (!isFinite(x) && !isFinite(y)) {
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| 18 | return x === y ? Infinity : -Infinity;
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| 19 | }
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| 20 | if (!isFinite(x) && y !== 0) {
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| 21 | return x > 0 ? Infinity : -Infinity;
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| 22 | }
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| 23 | if (!isFinite(y) && x !== 0) {
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| 24 | return y > 0 ? Infinity : -Infinity;
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| 25 | }
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| 26 |
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| 27 | // shortcut for the actual spec mechanics
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| 28 | return x * y;
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| 29 | };
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