настройка webpack

node_modules/es-abstract/2015/thisStringValue.js

@@ -0,0 +1,15 @@
+'use strict';
+
+var $StringValueOf = require('../helpers/callBound')('String.prototype.valueOf');
+
+var Type = require('./Type');
+
+// https://ecma-international.org/ecma-262/6.0/#sec-properties-of-the-string-prototype-object
+
+module.exports = function thisStringValue(value) {
+	if (Type(value) === 'String') {
+		return value;
+	}
+
+	return $StringValueOf(value);
+};