first

node_modules/core-js/modules/esnext.number.from-string.js

@@ -0,0 +1,38 @@
+'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;
+  }
+});