npm and error messages

node_modules/postcss-merge-longhand/dist/lib/identical.js

@@ -0,0 +1,19 @@
+'use strict';
+
+Object.defineProperty(exports, '__esModule', {
+    value: true
+});
+
+exports['default'] = function () {
+    for (var _len = arguments.length, rules = Array(_len), _key = 0; _key < _len; _key++) {
+        rules[_key] = arguments[_key];
+    }
+
+    var candidate = rules[0].value;
+    return rules.every(function (_ref) {
+        var value = _ref.value;
+        return value === candidate;
+    });
+};
+
+module.exports = exports['default'];