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- 'use strict';
- var $TypeError = require('es-errors/type');
- var isNaN = require('../../helpers/isNaN');
- // https://262.ecma-international.org/11.0/#sec-numeric-types-number-unaryMinus
- module.exports = function NumberUnaryMinus(x) {
- if (typeof x !== 'number') {
- throw new $TypeError('Assertion failed: `x` argument must be a Number');
- }
- if (isNaN(x)) {
- return NaN;
- }
- return -x;
- };
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