sameValueZero.js 575 B

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  1. 'use strict';
  2. var GetIntrinsic = require('get-intrinsic');
  3. var $TypeError = GetIntrinsic('%TypeError%');
  4. var isNaN = require('../../helpers/isNaN');
  5. var Type = require('../Type');
  6. // https://262.ecma-international.org/11.0/#sec-numeric-types-number-sameValueZero
  7. module.exports = function NumberSameValueZero(x, y) {
  8. if (Type(x) !== 'Number' || Type(y) !== 'Number') {
  9. throw new $TypeError('Assertion failed: `x` and `y` arguments must be Numbers');
  10. }
  11. var xNaN = isNaN(x);
  12. var yNaN = isNaN(y);
  13. if (xNaN || yNaN) {
  14. return xNaN === yNaN;
  15. }
  16. return x === y;
  17. };