fix(apps/ensadmin): keep open ENSAdmin GraphiQL docs sidebar (#2001)

Co-authored-by: shrugs <mattgcondon@gmail.com>

Author: notrab

.changeset/large-fans-stop.md

@@ -0,0 +1,5 @@
+---
+"ensadmin": patch
+---
+
+Fix ENSAdmin GraphiQL docs sidebar failing to stay open on the omnigraph page. The editor now memoizes its fetcher, storage, and plugins so 1Hz parent re-renders (driven by the realtime indexing-status projection) no longer trigger schema re-introspection.

apps/ensadmin/src/components/graphiql-editor/components.tsx

@@ -7,50 +7,68 @@ import "@graphiql/plugin-explorer/style.css";
 import { explorerPlugin } from "@graphiql/plugin-explorer";
 import { createGraphiQLFetcher } from "@graphiql/toolkit";
 import { GraphiQL, type GraphiQLProps, HISTORY_PLUGIN } from "graphiql";
+import { useMemo } from "react";
 
 interface GraphiQLPropsWithUrl extends Omit<GraphiQLProps, "fetcher"> {
   /** The URL of the GraphQL endpoint */
   url: string;
 }
 
+const EMPTY_PLUGINS: NonNullable<GraphiQLProps["plugins"]> = [];
+
 /**
  * The GraphiQL editor component used to render the generic GraphiQL editor UI.
  * We use this component to render GraphiQL editors.
  */
-export function GraphiQLEditor({ url, plugins = [], ...props }: GraphiQLPropsWithUrl) {
-  if (!url || typeof window === "undefined") {
-    return null;
-  }
+export function GraphiQLEditor({ url, plugins = EMPTY_PLUGINS, ...props }: GraphiQLPropsWithUrl) {
+  // Memoize the fetcher so its reference is stable across re-renders. Otherwise
+  // GraphiQL re-runs schema introspection on every parent re-render (e.g. when
+  // a parent subscribes to a 1s-ticking hook), which resets the docs sidebar.
+  const fetcher = useMemo(
+    () =>
+      createGraphiQLFetcher({
+        url,
+        // Disable subscriptions for now since we don't have a WebSocket server
+        // legacyWsClient: false,
+        subscriptionUrl: undefined,
+        wsConnectionParams: undefined,
+      }),
+    [url],
+  );
 
-  const fetcher = createGraphiQLFetcher({
-    url,
-    // Disable subscriptions for now since we don't have a WebSocket server
-    // legacyWsClient: false,
-    subscriptionUrl: undefined,
-    wsConnectionParams: undefined,
-  });
+  // Guard against SSR: hooks run before the early-return below, and `localStorage`
+  // is undefined on the server. Returning `undefined` is safe because the component
+  // returns `null` after the hooks when there's no window.
+  const storage = useMemo(() => {
+    if (typeof window === "undefined") return undefined;
+    const storageNamespace = `ensnode:graphiql:${url}`;
+    const prefix = `${storageNamespace}:`;
+    return {
+      getItem: (key: string) => localStorage.getItem(`${prefix}${key}`),
+      setItem: (key: string, value: string) => localStorage.setItem(`${prefix}${key}`, value),
+      removeItem: (key: string) => localStorage.removeItem(`${prefix}${key}`),
+      // Only clear keys in this namespace so unrelated ENSAdmin state survives.
+      clear: () => {
+        for (let i = localStorage.length - 1; i >= 0; i--) {
+          const key = localStorage.key(i);
+          if (key?.startsWith(prefix)) localStorage.removeItem(key);
+        }
+      },
+      get length() {
+        return localStorage.length;
+      },
+    };
+  }, [url]);
 
-  // Create a unique storage namespace for each endpoint
-  const storageNamespace = `ensnode:graphiql:${url}`;
+  // Instantiated per editor instance — explorerPlugin holds editor-scoped state,
+  // so sharing one instance across editors causes them to clobber each other.
+  const explorer = useMemo(() => explorerPlugin(), []);
 
-  // Custom storage implementation with namespaced keys
-  const storage = {
-    getItem: (key: string) => {
-      return localStorage.getItem(`${storageNamespace}:${key}`);
-    },
-    setItem: (key: string, value: string) => {
-      localStorage.setItem(`${storageNamespace}:${key}`, value);
-    },
-    removeItem: (key: string) => {
-      localStorage.removeItem(`${storageNamespace}:${key}`);
-    },
-    clear: () => {
-      localStorage.clear();
-    },
-    length: localStorage.length,
-  };
+  const mergedPlugins = useMemo(() => [HISTORY_PLUGIN, explorer, ...plugins], [explorer, plugins]);
 
-  const explorer = explorerPlugin();
+  if (!url || typeof window === "undefined") {
+    return null;
+  }
 
   return (
     <div className="flex-1 graphiql-container">
@@ -60,7 +78,7 @@ export function GraphiQLEditor({ url, plugins = [], ...props }: GraphiQLPropsWit
         storage={storage}
         forcedTheme="light"
         fetcher={fetcher}
-        plugins={[HISTORY_PLUGIN, explorer, ...plugins]}
+        plugins={mergedPlugins}
         {...props}
       />
     </div>