enabled without configuration

.changeset/tricky-clocks-end.md

@@ -1,16 +1,7 @@
 ---
-'@astrojs/vercel': minor
+'@astrojs/vercel': major
 ---
 
-The Vercel adapter now allows you to enable streaming!
+The Vercel adapter now streams responses!
 
-Bring better performance to your visitors by showing them content as it is rendered. The browser can also start loading the required stylesheets and scripts much sooner, which ultimately results in faster full page loads.
-
-
-```diff
-export default defineConfig({
-    output: "server",
-    adapter: vercel({
-+       streaming: true
-    }),
-});
+This brings better performance to your visitors by showing them content as it is rendered. The browser can also start loading the required stylesheets and scripts much sooner, which ultimately results in faster full page loads.

packages/integrations/vercel/README.md

@@ -281,28 +281,6 @@ export default defineConfig({
 });
 ```
 
-### streaming
-
-**Type:** `boolean`<br>
-**Available for:** Serverless
-
-Determines whether or not the serverless function will stream its response to the browser, sending components as they are rendered.
-
-The default value is `false`. Set this value to `true` in your Vercel adapter configuration to enable streaming.
-
-```diff lang="js"
-// astro.config.mjs
-import { defineConfig } from 'astro/config';
-import vercel from '@astrojs/vercel/serverless';
-
-export default defineConfig({
-    output: "server",
-    adapter: vercel({
-+       streaming: true
-    }),
-});
-```
-
 ### Function bundling configuration
 
 The Vercel adapter combines all of your routes into a single function by default.

packages/integrations/vercel/src/serverless/adapter.ts

@@ -105,9 +105,6 @@ export interface VercelServerlessConfig {
 
 	/** The maximum duration (in seconds) that Serverless Functions can run before timing out. See the [Vercel documentation](https://vercel.com/docs/functions/serverless-functions/runtimes#maxduration) for the default and maximum limit for your account plan. */
 	maxDuration?: number;
-
-	/** Whether to allow the serverless function to stream the response to the browser. */
-	streaming?: boolean;
 }
 
 export default function vercelServerless({
@@ -122,7 +119,6 @@ export default function vercelServerless({
 	functionPerRoute = false,
 	edgeMiddleware = false,
 	maxDuration,
-	streaming,
 }: VercelServerlessConfig = {}): AstroIntegration {
 	if (maxDuration) {
 		if (typeof maxDuration !== 'number') {
@@ -280,7 +276,6 @@ You can set functionPerRoute: false to prevent surpassing the limit.`
 							includeFiles: filesToInclude,
 							excludeFiles,
 							maxDuration,
-							streaming,
 						});
 						routeDefinitions.push({
 							src: route.pattern.source,
@@ -297,7 +292,6 @@ You can set functionPerRoute: false to prevent surpassing the limit.`
 						includeFiles: filesToInclude,
 						excludeFiles,
 						maxDuration,
-						streaming,
 					});
 					routeDefinitions.push({ src: '/.*', dest: 'render' });
 				}
@@ -348,7 +342,6 @@ interface CreateFunctionFolderArgs {
 	includeFiles: URL[];
 	excludeFiles?: string[];
 	maxDuration: number | undefined;
-	streaming: boolean | undefined;
 }
 
 async function createFunctionFolder({
@@ -360,7 +353,6 @@ async function createFunctionFolder({
 	includeFiles,
 	excludeFiles,
 	maxDuration,
-	streaming,
 }: CreateFunctionFolderArgs) {
 	const functionFolder = new URL(`./functions/${functionName}.func/`, config.outDir);
 
@@ -389,7 +381,7 @@ async function createFunctionFolder({
 		handler,
 		launcherType: 'Nodejs',
 		maxDuration,
-		supportsResponseStreaming: streaming,
+		supportsResponseStreaming: true,
 	});
 }
 

packages/integrations/vercel/test/fixtures/streaming/astro.config.mjs

@@ -3,7 +3,5 @@ import vercel from '@astrojs/vercel/serverless';
 
 export default defineConfig({
 	output: "server",
-	adapter: vercel({
-		streaming: true
-	})
+	adapter: vercel()
 });