npm and error messages

node_modules/postcss-loader/lib/Error.js

@@ -0,0 +1,17 @@
+'use strict'
+
+class SyntaxError extends Error {
+  constructor (err) {
+    super(err)
+
+    this.name = 'Syntax Error'
+
+    this.message = ''
+    this.message += `${this.name} \n\n(${err.line}:${err.column}) ${err.reason}`
+    this.message += `\n\n${err.showSourceCode()}\n`
+
+    this.stack = false
+  }
+}
+
+module.exports = SyntaxError