npm and error messages

node_modules/babel-plugin-transform-exponentiation-operator/lib/index.js

@@ -0,0 +1,27 @@
+"use strict";
+
+exports.__esModule = true;
+
+exports.default = function (_ref) {
+  var t = _ref.types;
+
+  return {
+    inherits: require("babel-plugin-syntax-exponentiation-operator"),
+
+    visitor: (0, _babelHelperBuilderBinaryAssignmentOperatorVisitor2.default)({
+      operator: "**",
+
+      build: function build(left, right) {
+        return t.callExpression(t.memberExpression(t.identifier("Math"), t.identifier("pow")), [left, right]);
+      }
+    })
+  };
+};
+
+var _babelHelperBuilderBinaryAssignmentOperatorVisitor = require("babel-helper-builder-binary-assignment-operator-visitor");
+
+var _babelHelperBuilderBinaryAssignmentOperatorVisitor2 = _interopRequireDefault(_babelHelperBuilderBinaryAssignmentOperatorVisitor);
+
+function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
+
+module.exports = exports["default"];