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rOACCT/node_modules/core-js/modules/esnext.number.from-string.js
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esnext.number.from-string.js
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			'use strict';
			var $ = require('../internals/export');
			var uncurryThis = require('../internals/function-uncurry-this');
			var toIntegerOrInfinity = require('../internals/to-integer-or-infinity');
			var parseInt = require('../internals/number-parse-int');

			var INVALID_NUMBER_REPRESENTATION = 'Invalid number representation';
			var INVALID_RADIX = 'Invalid radix';
			var $RangeError = RangeError;
			var $SyntaxError = SyntaxError;
			var $TypeError = TypeError;
			var valid = /^[\da-z]+$/;
			var charAt = uncurryThis(''.charAt);
			var exec = uncurryThis(valid.exec);
			var numberToString = uncurryThis(1.0.toString);
			var stringSlice = uncurryThis(''.slice);

			// `Number.fromString` method
			// https://github.com/tc39/proposal-number-fromstring
			$({ target: 'Number', stat: true, forced: true }, {
			fromString: function fromString(string, radix) {
			var sign = 1;
			var R, mathNum;
			if (typeof string != 'string') throw $TypeError(INVALID_NUMBER_REPRESENTATION);
			if (!string.length) throw $SyntaxError(INVALID_NUMBER_REPRESENTATION);
			if (charAt(string, 0) == '-') {
			sign = -1;
			string = stringSlice(string, 1);
			if (!string.length) throw $SyntaxError(INVALID_NUMBER_REPRESENTATION);
			}
			R = radix === undefined ? 10 : toIntegerOrInfinity(radix);
			if (R < 2 \|\| R > 36) throw $RangeError(INVALID_RADIX);
			if (!exec(valid, string) \|\| numberToString(mathNum = parseInt(string, R), R) !== string) {
			throw $SyntaxError(INVALID_NUMBER_REPRESENTATION);
			}
			return sign * mathNum;
			}
			});