flow like the river

BACK_BACK/node_modules/parcel-bundler/lib/utils/customErrors.js

@@ -0,0 +1,18 @@
+"use strict";
+
+const serverErrorList = {
+  EACCES: "You don't have access to bind the server to port {port}.",
+  EADDRINUSE: 'There is already a process listening on port {port}.'
+};
+
+function serverErrors(err, port) {
+  let desc = `Error: ${err.code} occurred while setting up server on port ${port}.`;
+
+  if (serverErrorList[err.code]) {
+    desc = serverErrorList[err.code].replace(/{port}/g, port);
+  }
+
+  return desc;
+}
+
+module.exports.serverErrors = serverErrors;