.

node_modules/jsdom/lib/jsdom/browser/not-implemented.js

@@ -0,0 +1,13 @@
+"use strict";
+
+module.exports = function (nameForErrorMessage, window) {
+  if (!window) {
+    // Do nothing for window-less documents.
+    return;
+  }
+
+  const error = new Error(`Not implemented: ${nameForErrorMessage}`);
+  error.type = "not implemented";
+
+  window._virtualConsole.emit("jsdomError", error);
+};