opennextjs · vicb · Sep 25, 2025 · Sep 24, 2025 · Sep 24, 2025 · Sep 24, 2025
diff --git a/.changeset/silver-walls-cover.md b/.changeset/silver-walls-cover.md
@@ -0,0 +1,5 @@
+---
+"@opennextjs/cloudflare": minor
+---
+
+feat: add an experimental KV based tag cache
diff --git a/examples/common/apps.ts b/examples/common/apps.ts
@@ -16,6 +16,7 @@ const apps = [
 	"experimental",
 	// overrides
 	"d1-tag-next",
+	"kv-tag-next",
 	"memory-queue",
 	"r2-incremental-cache",
 	"static-assets-incremental-cache",

diff --git a/examples/overrides/kv-tag-next/.gitignore b/examples/overrides/kv-tag-next/.gitignore
@@ -0,0 +1,47 @@
+# See https://help.github.com/articles/ignoring-files/ for more about ignoring files.
+
+# dependencies
+/node_modules
+/.pnp
+.pnp.*
+.yarn/*
+!.yarn/patches
+!.yarn/plugins
+!.yarn/releases
+!.yarn/versions
+
+# testing
+/coverage
+
+# next.js
+/.next/
+/out/
+
+# production
+/build
+
+# misc
+.DS_Store
+*.pem
+
+# debug
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+.pnpm-debug.log*
+
+# env files (can opt-in for committing if needed)
+.env*
+
+# vercel
+.vercel
+
+# typescript
+*.tsbuildinfo
+next-env.d.ts
+
+# playwright
+/test-results/
+/playwright-report/
+/blob-report/
+/playwright/.cache/
diff --git a/examples/overrides/kv-tag-next/app/action.ts b/examples/overrides/kv-tag-next/app/action.ts
@@ -0,0 +1,11 @@
+"use server";
+
+import { revalidatePath, revalidateTag } from "next/cache";
+
+export async function revalidateTagAction() {
+	revalidateTag("date");
+}
+
+export async function revalidatePathAction() {
+	revalidatePath("/");
+}
diff --git a/examples/overrides/kv-tag-next/app/components/revalidationButtons.tsx b/examples/overrides/kv-tag-next/app/components/revalidationButtons.tsx
@@ -0,0 +1,27 @@
+"use client";
+
+import { revalidateTagAction, revalidatePathAction } from "../action";
+
+export default function RevalidationButtons() {
+	return (
+		<div>
+			<button
+				data-testid="revalidate-tag"
+				onClick={async () => {
+					await revalidateTagAction();
+				}}
+			>
+				Invalidate tag
+			</button>
+
+			<button
+				data-testid="revalidate-path"
+				onClick={async () => {
+					await revalidatePathAction();
+				}}
+			>
+				Invalidate Path
+			</button>
+		</div>
+	);
+}
diff --git a/examples/overrides/kv-tag-next/app/favicon.ico b/examples/overrides/kv-tag-next/app/favicon.ico
diff --git a/examples/overrides/kv-tag-next/app/globals.css b/examples/overrides/kv-tag-next/app/globals.css
@@ -0,0 +1,14 @@
+html,
+body {
+	max-width: 100vw;
+	overflow-x: hidden;
+	height: 100vh;
+	display: flex;
+	flex-direction: column;
+}
+
+footer {
+	padding: 1rem;
+	display: flex;
+	justify-content: end;
+}
diff --git a/examples/overrides/kv-tag-next/app/layout.tsx b/examples/overrides/kv-tag-next/app/layout.tsx
@@ -0,0 +1,28 @@
+import type { Metadata } from "next";
+import "./globals.css";
+
+import { getCloudflareContext } from "@opennextjs/cloudflare";
+
+export const metadata: Metadata = {
+	title: "SSG App",
+	description: "An app in which all the routes are SSG'd",
+};
+
+export default async function RootLayout({
+	children,
+}: Readonly<{
+	children: React.ReactNode;
+}>) {
+	const cloudflareContext = await getCloudflareContext({
+		async: true,
+	});
+
+	return (
+		<html lang="en">
+			<body>
+				{children}
+				<footer data-testid="app-version">{cloudflareContext.env.APP_VERSION}</footer>
+			</body>
+		</html>
+	);
+}
diff --git a/examples/overrides/kv-tag-next/app/page.module.css b/examples/overrides/kv-tag-next/app/page.module.css
@@ -0,0 +1,17 @@
+.page {
+	display: grid;
+	grid-template-rows: 20px 1fr 20px;
+	align-items: center;
+	justify-items: center;
+	flex: 1;
+	border: 3px solid gray;
+	margin: 1rem;
+	margin-block-end: 0;
+}
+
+.main {
+	display: flex;
+	flex-direction: column;
+	gap: 32px;
+	grid-row-start: 2;
+}
diff --git a/examples/overrides/kv-tag-next/app/page.tsx b/examples/overrides/kv-tag-next/app/page.tsx
@@ -0,0 +1,26 @@
+import { unstable_cache } from "next/cache";
+import styles from "./page.module.css";
+import RevalidationButtons from "./components/revalidationButtons";
+
+const fetchedDateCb = unstable_cache(
+	async () => {
+		return Date.now();
+	},
+	["date"],
+	{ tags: ["date"] }
+);
+
+export default async function Home() {
+	const fetchedDate = await fetchedDateCb();
+	return (
+		<div className={styles.page}>
+			<main className={styles.main}>
+				<h1>Hello from a Statically generated page</h1>
+				<p data-testid="date-local">{Date.now()}</p>
+				<p data-testid="date-fetched">{fetchedDate}</p>
+
+				<RevalidationButtons />
+			</main>
+		</div>
+	);
+}
diff --git a/examples/overrides/kv-tag-next/e2e/base.spec.ts b/examples/overrides/kv-tag-next/e2e/base.spec.ts
@@ -0,0 +1,47 @@
+import { test, expect } from "@playwright/test";
+
+test.describe("kv-tag-next", () => {
+	test("the index page should work", async ({ page }) => {
+		await page.goto("/");
+		await expect(page.getByText("Hello from a Statically generated page")).toBeVisible();
+	});
+
+	test("the index page should keep the same date on reload", async ({ page }) => {
+		await page.goto("/");
+		const date = await page.getByTestId("date-local").textContent();
+		expect(date).not.toBeNull();
+		await page.reload();
+		const newDate = await page.getByTestId("date-local").textContent();
+		expect(date).toEqual(newDate);
+	});
+
+	test("the index page should revalidate the date on click on revalidateTag", async ({ page }) => {
+		await page.goto("/");
+		const date = await page.getByTestId("date-fetched").textContent();
+		await page.getByTestId("revalidate-tag").click();
+		await page.waitForTimeout(100);
+		const newDate = await page.getByTestId("date-fetched").textContent();
+		expect(date).not.toEqual(newDate);
+	});
+
+	test("the index page should revalidate the date on click on revalidatePath", async ({ page }) => {
+		await page.goto("/");
+		const date = await page.getByTestId("date-fetched").textContent();
+		await page.getByTestId("revalidate-path").click();
+		await page.waitForTimeout(100);
+		const newDate = await page.getByTestId("date-fetched").textContent();
+		expect(date).not.toEqual(newDate);
+	});
+
+	test("the index page should keep the same date on reload after revalidation", async ({ page }) => {
+		await page.goto("/");
+		const initialDate = await page.getByTestId("date-fetched").textContent();
+		await page.getByTestId("revalidate-tag").click();
+		await page.waitForTimeout(100);
+		const date = await page.getByTestId("date-fetched").textContent();
+		expect(initialDate).not.toEqual(date);
+		await page.reload();
+		const newDate = await page.getByTestId("date-fetched").textContent();
+		expect(date).toEqual(newDate);
+	});
+});
diff --git a/examples/overrides/kv-tag-next/e2e/playwright.config.ts b/examples/overrides/kv-tag-next/e2e/playwright.config.ts
@@ -0,0 +1,4 @@
+import { configurePlaywright } from "../../../common/config-e2e";
+
+// Here we don't want to run the tests in parallel
+export default configurePlaywright("kv-tag-next", { parallel: false });
diff --git a/examples/overrides/kv-tag-next/next.config.ts b/examples/overrides/kv-tag-next/next.config.ts
@@ -0,0 +1,11 @@
+import type { NextConfig } from "next";
+import { initOpenNextCloudflareForDev } from "@opennextjs/cloudflare";
+
+initOpenNextCloudflareForDev();
+
+const nextConfig: NextConfig = {
+	typescript: { ignoreBuildErrors: true },
+	eslint: { ignoreDuringBuilds: true },
+};
+
+export default nextConfig;
diff --git a/examples/overrides/kv-tag-next/open-next.config.ts b/examples/overrides/kv-tag-next/open-next.config.ts
@@ -0,0 +1,8 @@
+import { defineCloudflareConfig } from "@opennextjs/cloudflare";
+import kvIncrementalCache from "@opennextjs/cloudflare/overrides/incremental-cache/kv-incremental-cache";
+import kvNextTagCache from "@opennextjs/cloudflare/overrides/tag-cache/kv-next-tag-cache";
+
+export default defineCloudflareConfig({
+	incrementalCache: kvIncrementalCache,
+	tagCache: kvNextTagCache,
+});
diff --git a/examples/overrides/kv-tag-next/package.json b/examples/overrides/kv-tag-next/package.json
@@ -0,0 +1,29 @@
+{
+	"name": "kv-tag-next",
+	"version": "0.1.0",
+	"private": true,
+	"scripts": {
+		"dev": "next dev",
+		"build": "next build",
+		"start": "next start",
+		"lint": "next lint",
+		"build:worker": "pnpm opennextjs-cloudflare build --skipWranglerConfigCheck",
+		"preview:worker": "pnpm opennextjs-cloudflare preview --config wrangler.e2e.jsonc",
+		"preview": "pnpm build:worker && pnpm preview:worker",
+		"e2e": "playwright test -c e2e/playwright.config.ts"
+	},
+	"dependencies": {
+		"react": "catalog:e2e",
+		"react-dom": "catalog:e2e",
+		"next": "catalog:e2e"
+	},
+	"devDependencies": {
+		"@opennextjs/cloudflare": "workspace:*",
+		"@playwright/test": "catalog:",
+		"@types/node": "catalog:",
+		"@types/react": "catalog:e2e",
+		"@types/react-dom": "catalog:e2e",
+		"typescript": "catalog:",
+		"wrangler": "catalog:"
+	}
+}
diff --git a/examples/overrides/kv-tag-next/tsconfig.json b/examples/overrides/kv-tag-next/tsconfig.json
@@ -0,0 +1,27 @@
+{
+	"compilerOptions": {
+		"target": "ES2017",
+		"lib": ["dom", "dom.iterable", "esnext"],
+		"allowJs": true,
+		"skipLibCheck": true,
+		"strict": true,
+		"noEmit": true,
+		"esModuleInterop": true,
+		"module": "esnext",
+		"moduleResolution": "bundler",
+		"resolveJsonModule": true,
+		"isolatedModules": true,
+		"jsx": "preserve",
+		"incremental": true,
+		"plugins": [
+			{
+				"name": "next"
+			}
+		],
+		"paths": {
+			"@/*": ["./*"]
+		}
+	},
+	"include": ["next-env.d.ts", "**/*.ts", "**/*.tsx", ".next/types/**/*.ts"],
+	"exclude": ["node_modules"]
+}
diff --git a/examples/overrides/kv-tag-next/wrangler.e2e.jsonc b/examples/overrides/kv-tag-next/wrangler.e2e.jsonc
@@ -0,0 +1,25 @@
+{
+	"$schema": "node_modules/wrangler/config-schema.json",
+	"main": ".open-next/worker.js",
+	"name": "ssg-app",
+	"compatibility_date": "2025-02-04",
+	"compatibility_flags": ["nodejs_compat", "global_fetch_strictly_public"],
+	"assets": {
+		"directory": ".open-next/assets",
+		"binding": "ASSETS",
+	},
+	"vars": {
+		"APP_VERSION": "1.2.345",
+	},
+	"kv_namespaces": [
+		{
+			"binding": "NEXT_INC_CACHE_KV",
+			"id": "INC-CACHE",
+			"preview_id": "<BINDING_ID>",
+		},
+		{
+			"binding": "NEXT_TAG_CACHE_KV",
+			"id": "TAG-CACHE",
+		},
+	],
+}
diff --git a/packages/cloudflare/src/api/cloudflare-context.ts b/packages/cloudflare/src/api/cloudflare-context.ts
@@ -33,6 +33,9 @@ declare global {
 		// D1 db used for the tag cache
 		NEXT_TAG_CACHE_D1?: D1Database;
 
+		// KV used for the tag cache
+		NEXT_TAG_CACHE_KV?: KVNamespace;
+
 		// Durables object namespace to use for the sharded tag cache
 		NEXT_TAG_CACHE_DO_SHARDED?: DurableObjectNamespace<DOShardedTagCache>;
 		// Queue of failed tag write

diff --git a/packages/cloudflare/src/api/overrides/tag-cache/d1-next-tag-cache.spec.ts b/packages/cloudflare/src/api/overrides/tag-cache/d1-next-tag-cache.spec.ts
@@ -59,7 +59,7 @@ describe("D1NextModeTagCache", () => {
 			env: {
 				[BINDING_NAME]: mockDb,
 			},
-		} as ReturnType<typeof getCloudflareContext>);
+		} as unknown as ReturnType<typeof getCloudflareContext>);
 
 		// Reset global config
 		(globalThis as { openNextConfig?: { dangerous?: { disableTagCache?: boolean } } }).openNextConfig = {