настройка webpack

node_modules/@babel/runtime/helpers/classPrivateFieldLooseBase.js

@@ -0,0 +1,9 @@
+function _classPrivateFieldBase(receiver, privateKey) {
+  if (!Object.prototype.hasOwnProperty.call(receiver, privateKey)) {
+    throw new TypeError("attempted to use private field on non-instance");
+  }
+
+  return receiver;
+}
+
+module.exports = _classPrivateFieldBase;