feat: support compatible node modules without prefixes (#11672)

* feat: support compatible node modules without prefixes

* Apply suggestions from code review

---------

Co-authored-by: Rich Harris <[email protected]>

Author: Rich-Harris

.changeset/old-ravens-learn.md

@@ -0,0 +1,6 @@
+---
+'@sveltejs/adapter-cloudflare-workers': minor
+'@sveltejs/adapter-cloudflare': minor
+---
+
+feat: support compatible node modules without prefixes

packages/adapter-cloudflare-workers/index.js

@@ -15,6 +15,21 @@ import { fileURLToPath } from 'node:url';
  * }} WranglerConfig
  */
 
+// list from https://developers.cloudflare.com/workers/runtime-apis/nodejs/
+const compatible_node_modules = [
+	'assert',
+	'async_hooks',
+	'buffer',
+	'crypto',
+	'diagnostics_channel',
+	'events',
+	'path',
+	'process',
+	'stream',
+	'string_decoder',
+	'util'
+];
+
 /** @type {import('./index.js').default} */
 export default function ({ config = 'wrangler.toml' } = {}) {
 	return {
@@ -64,19 +79,7 @@ export default function ({ config = 'wrangler.toml' } = {}) {
 
 			const external = ['__STATIC_CONTENT_MANIFEST', 'cloudflare:*'];
 			if (compatibility_flags && compatibility_flags.includes('nodejs_compat')) {
-				external.push(
-					'node:assert',
-					'node:async_hooks',
-					'node:buffer',
-					'node:crypto',
-					'node:diagnostics_channel',
-					'node:events',
-					'node:path',
-					'node:process',
-					'node:stream',
-					'node:string_decoder',
-					'node:util'
-				);
+				external.push(...compatible_node_modules.map((id) => `node:${id}`));
 			}
 
 			await esbuild.build({
@@ -88,6 +91,7 @@ export default function ({ config = 'wrangler.toml' } = {}) {
 				outfile: main,
 				bundle: true,
 				external,
+				alias: Object.fromEntries(compatible_node_modules.map((id) => [id, `node:${id}`])),
 				format: 'esm',
 				loader: {
 					'.wasm': 'copy'

packages/adapter-cloudflare/index.js

@@ -3,6 +3,21 @@ import * as path from 'node:path';
 import { fileURLToPath } from 'node:url';
 import * as esbuild from 'esbuild';
 
+// list from https://developers.cloudflare.com/workers/runtime-apis/nodejs/
+const compatible_node_modules = [
+	'assert',
+	'async_hooks',
+	'buffer',
+	'crypto',
+	'diagnostics_channel',
+	'events',
+	'path',
+	'process',
+	'stream',
+	'string_decoder',
+	'util'
+];
+
 /** @type {import('./index.js').default} */
 export default function (options = {}) {
 	return {
@@ -53,20 +68,7 @@ export default function (options = {}) {
 				}
 			});
 
-			const external = [
-				'cloudflare:*',
-				'node:assert',
-				'node:async_hooks',
-				'node:buffer',
-				'node:crypto',
-				'node:diagnostics_channel',
-				'node:events',
-				'node:path',
-				'node:process',
-				'node:stream',
-				'node:string_decoder',
-				'node:util'
-			];
+			const external = ['cloudflare:*', ...compatible_node_modules.map((id) => `node:${id}`)];
 
 			await esbuild.build({
 				platform: 'browser',
@@ -81,7 +83,8 @@ export default function (options = {}) {
 				loader: {
 					'.wasm': 'copy'
 				},
-				external
+				external,
+				alias: Object.fromEntries(compatible_node_modules.map((id) => [id, `node:${id}`]))
 			});
 		}
 	};