npm and error messages

node_modules/json-loader/index.js

@@ -0,0 +1,11 @@
+module.exports = function (source) {
+  if (this.cacheable) this.cacheable();
+
+  var value = typeof source === "string" ? JSON.parse(source) : source;
+
+  value = JSON.stringify(value)
+    .replace(/\u2028/g, '\\u2028')
+    .replace(/\u2029/g, '\\u2029');
+
+  return `module.exports = ${value}`;
+}