Beta 7 with some repo names changed.

Client/node_modules/ext/string_/includes/implementation.js

@@ -0,0 +1,7 @@
+"use strict";
+
+var indexOf = String.prototype.indexOf;
+
+module.exports = function (searchString/*, position*/) {
+	return indexOf.call(this, searchString, arguments[1]) > -1;
+};

Client/node_modules/ext/string_/includes/index.js

@@ -0,0 +1,5 @@
+"use strict";
+
+module.exports = require("./is-implemented")()
+	? String.prototype.includes
+	: require("./implementation");

Client/node_modules/ext/string_/includes/is-implemented.js

@@ -0,0 +1,8 @@
+"use strict";
+
+var str = "razdwatrzy";
+
+module.exports = function () {
+	if (typeof str.includes !== "function") return false;
+	return str.includes("dwa") === true && str.includes("foo") === false;
+};