examples: Update redis example with useOptimistic (#60596)

examples/with-redis/app/form.tsx

@@ -1,7 +1,7 @@
 "use client";
 
 import clsx from "clsx";
-import { useOptimistic, useRef } from "react";
+import { useOptimistic, useRef, useTransition } from "react";
 import { saveFeature, upvote } from "./actions";
 import { v4 as uuidv4 } from "uuid";
 import { Feature } from "./types";
@@ -23,22 +23,26 @@ function Item({
   pending: boolean;
   mutate: any;
 }) {
-  const upvoteWithId = upvote.bind(null, feature);
+  let upvoteWithId = upvote.bind(null, feature);
+  // eslint-disable-next-line @typescript-eslint/no-unused-vars
+  let [isPending, startTransition] = useTransition();
 
   return (
     <form
       action={upvoteWithId}
-      onSubmit={async (event) => {
+      onSubmit={(event) => {
         event.preventDefault();
-        mutate({
-          updatedFeature: {
-            ...feature,
-            score: Number(feature.score) + 1,
-          },
-          pending: true,
-        });
 
-        await upvote(feature);
+        startTransition(async () => {
+          mutate({
+            updatedFeature: {
+              ...feature,
+              score: Number(feature.score) + 1,
+            },
+            pending: true,
+          });
+          await upvote(feature);
+        });
       }}
       className={clsx(
         "p-6 mx-8 flex items-center border-t border-l border-r",
@@ -73,8 +77,8 @@ type FeatureState = {
 };
 
 export default function FeatureForm({ features }: { features: Feature[] }) {
-  const formRef = useRef<HTMLFormElement>(null);
-  const [state, mutate] = useOptimistic(
+  let formRef = useRef<HTMLFormElement>(null);
+  let [state, mutate] = useOptimistic(
     { features, pending: false },
     function createReducer(state, newState: FeatureState) {
       if (newState.newFeature) {
@@ -112,6 +116,8 @@ export default function FeatureForm({ features }: { features: Feature[] }) {
     score: "1",
   };
   let saveWithNewFeature = saveFeature.bind(null, featureStub);
+  // eslint-disable-next-line @typescript-eslint/no-unused-vars
+  let [isPending, startTransition] = useTransition();
 
   return (
     <>
@@ -120,7 +126,7 @@ export default function FeatureForm({ features }: { features: Feature[] }) {
           className="relative my-8"
           ref={formRef}
           action={saveWithNewFeature}
-          onSubmit={async (event) => {
+          onSubmit={(event) => {
             event.preventDefault();
             let formData = new FormData(event.currentTarget);
             let newFeature = {
@@ -128,12 +134,15 @@ export default function FeatureForm({ features }: { features: Feature[] }) {
               title: formData.get("feature") as string,
             };
 
-            mutate({
-              newFeature,
-              pending: true,
-            });
             formRef.current?.reset();
-            await saveFeature(newFeature, formData);
+            startTransition(async () => {
+              mutate({
+                newFeature,
+                pending: true,
+              });
+
+              await saveFeature(newFeature, formData);
+            });
           }}
         >
           <input

examples/with-redis/app/page.tsx

@@ -30,27 +30,32 @@ function VercelLogo(props: React.SVGProps<SVGSVGElement>) {
 }
 
 async function getFeatures() {
-  let itemIds = await kv.zrange("items_by_score", 0, 100, {
-    rev: true,
-  });
+  try {
+    let itemIds = await kv.zrange("items_by_score", 0, 100, {
+      rev: true,
+    });
 
-  if (!itemIds.length) {
+    if (!itemIds.length) {
+      return [];
+    }
+
+    let multi = kv.multi();
+    itemIds.forEach((id) => {
+      multi.hgetall(`item:${id}`);
+    });
+
+    let items: Feature[] = await multi.exec();
+    return items.map((item) => {
+      return {
+        ...item,
+        score: item.score,
+        created_at: item.created_at,
+      };
+    });
+  } catch (error) {
+    console.error(error);
     return [];
   }
-
-  let multi = kv.multi();
-  itemIds.forEach((id) => {
-    multi.hgetall(`item:${id}`);
-  });
-
-  let items: Feature[] = await multi.exec();
-  return items.map((item) => {
-    return {
-      ...item,
-      score: item.score,
-      created_at: item.created_at,
-    };
-  });
 }
 
 export default async function Page() {

examples/with-redis/package.json

@@ -6,20 +6,20 @@
     "start": "next start"
   },
   "dependencies": {
-    "@types/node": "20.10.3",
-    "@types/react": "18.2.42",
-    "@types/react-dom": "18.2.17",
+    "@types/node": "20.11.0",
+    "@types/react": "18.2.47",
+    "@types/react-dom": "18.2.18",
     "@types/uuid": "9.0.7",
-    "@vercel/kv": "^1.0.0",
+    "@vercel/kv": "^1.0.1",
     "autoprefixer": "10.4.16",
-    "clsx": "^2.0.0",
-    "geist": "^1.2.0",
-    "next": "canary",
-    "postcss": "^8.4.32",
+    "clsx": "^2.1.0",
+    "geist": "^1.2.1",
+    "next": "latest",
+    "postcss": "^8.4.33",
     "react": "18.2.0",
     "react-dom": "18.2.0",
-    "tailwindcss": "3.3.6",
-    "typescript": "5.3.2",
+    "tailwindcss": "3.4.1",
+    "typescript": "5.3.3",
     "uuid": "^9.0.1"
   }
 }