Pass the compatibility_date and compatibility_flags to the unenv preset (#10482)

* Move nodejs_compat logic to class and instantiate per nodejs_compat enabled environment

* Add test for https module

* Add changeset

* More JSDoc

* Reuse helper function

Author: jamesopstad

.changeset/shaky-melons-help.md

@@ -0,0 +1,5 @@
+---
+"@cloudflare/vite-plugin": patch
+---
+
+Pass the `compatibility_date` and `compatibility_flags` to the `unenv` preset. This enables support for the `node:http` and `node:https` modules.

packages/vite-plugin-cloudflare/playground/node-compat/__tests__/worker-https/https.spec.ts

@@ -0,0 +1,6 @@
+import { expect, test } from "vitest";
+import { getTextResponse } from "../../../__test-utils__";
+
+test("supports `node:https` module", async () => {
+	expect(await getTextResponse()).toBe("OK");
+});

packages/vite-plugin-cloudflare/playground/node-compat/package.json

@@ -22,6 +22,9 @@
 		"debug:dev": "vite dev -c vite.config.worker-debug.ts",
 		"debug:preview": "vite preview -c vite.config.worker-debug.ts",
 		"debug:test": "vitest run -c ../vitest.config.e2e.ts worker-debug",
+		"https:build": "vite build --app -c vite.config.worker-https.ts",
+		"https:dev": "vite dev -c vite.config.worker-https.ts",
+		"https:preview": "vite preview -c vite.config.worker-https.ts",
 		"postgres:build": "vite build --app -c vite.config.worker-postgres.ts",
 		"postgres:dev": "vite dev -c vite.config.worker-postgres.ts",
 		"postgres:preview": "vite preview -c vite.config.worker-postgres.ts",

packages/vite-plugin-cloudflare/playground/node-compat/tsconfig.worker.json

@@ -6,6 +6,7 @@
 		"worker-cross-env",
 		"worker-crypto",
 		"worker-debug",
+		"worker-https",
 		"worker-postgres",
 		"worker-process",
 		"worker-random",

packages/vite-plugin-cloudflare/playground/node-compat/vite.config.worker-https.ts

@@ -0,0 +1,15 @@
+import { cloudflare } from "@cloudflare/vite-plugin";
+import { defineConfig } from "vite";
+
+export default defineConfig({
+	build: {
+		outDir: "dist/worker-https",
+	},
+	plugins: [
+		cloudflare({
+			configPath: "./worker-https/wrangler.jsonc",
+			inspectorPort: false,
+			persistState: false,
+		}),
+	],
+});

packages/vite-plugin-cloudflare/playground/node-compat/worker-https/index.ts

@@ -0,0 +1,11 @@
+import * as https from "node:https";
+
+export default {
+	async fetch() {
+		// This will throw a 'not implemented' error if the compatibility_date is earlier than '2025-08-15' and the 'enable_nodejs_http_modules' compatibility_flag is not present
+		const req = https.request({});
+		req.end();
+
+		return new Response("OK");
+	},
+} satisfies ExportedHandler;

packages/vite-plugin-cloudflare/playground/node-compat/worker-https/wrangler.jsonc

@@ -0,0 +1,7 @@
+{
+	"name": "worker",
+	"main": "./index.ts",
+	// This is the minimum compatibility_date that has http_modules enabled by default
+	"compatibility_date": "2025-08-15",
+	"compatibility_flags": ["nodejs_compat"],
+}

packages/vite-plugin-cloudflare/src/cloudflare-environment.ts

@@ -1,7 +1,6 @@
 import assert from "node:assert";
 import * as util from "node:util";
 import * as vite from "vite";
-import { isNodeCompat } from "./node-js-compat";
 import { INIT_PATH, UNKNOWN_HOST, WORKER_ENTRY_PATH_HEADER } from "./shared";
 import { getOutputDirectory } from "./utils";
 import type { WorkerConfig, WorkersResolvedConfig } from "./plugin-config";
@@ -130,14 +129,16 @@ export function createCloudflareEnvironmentOptions({
 	mode,
 	environmentName,
 	isEntryWorker,
+	hasNodeJsCompat,
 }: {
 	workerConfig: WorkerConfig;
 	userConfig: vite.UserConfig;
 	mode: vite.ConfigEnv["mode"];
 	environmentName: string;
 	isEntryWorker: boolean;
+	hasNodeJsCompat: boolean;
 }): vite.EnvironmentOptions {
-	const define = getProcessEnvReplacements(workerConfig, mode);
+	const define = getProcessEnvReplacements(hasNodeJsCompat, mode);
 
 	return {
 		resolve: {
@@ -205,12 +206,12 @@ export function createCloudflareEnvironmentOptions({
  * Gets `process.env` replacement values.
  * `process.env.NODE_ENV` is always replaced.
  * `process.env` is replaced with an empty object if `nodejs_compat` is not enabled
- * @param workerConfig - the Worker config (used to determine if `nodejs_compat` is enabled)
+ * @param hasNodeJsCompat - whether `nodejs_compat` is enabled
  * @param mode - the Vite mode
  * @returns replacement values
  */
 function getProcessEnvReplacements(
-	workerConfig: WorkerConfig,
+	hasNodeJsCompat: boolean,
 	mode: vite.ConfigEnv["mode"]
 ): Record<string, string> {
 	const nodeEnv = process.env.NODE_ENV || mode;
@@ -220,7 +221,7 @@ function getProcessEnvReplacements(
 		"globalThis.process.env.NODE_ENV": JSON.stringify(nodeEnv),
 	};
 
-	return isNodeCompat(workerConfig)
+	return hasNodeJsCompat
 		? nodeEnvReplacements
 		: {
 				...nodeEnvReplacements,