lessThan.js 642 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-lessThan
  7. module.exports = function NumberLessThan(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. // If x is NaN, return undefined.
  12. // If y is NaN, return undefined.
  13. if (isNaN(x) || isNaN(y)) {
  14. return void undefined;
  15. }
  16. // shortcut for the actual spec mechanics
  17. return x < y;
  18. };