fix: adapter-cloudflare-workers prerendering bug [w/ reproduction]

.changeset/chilly-cars-battle.md

@@ -0,0 +1,6 @@
+---
+'@sveltejs/adapter-cloudflare-workers': patch
+---
+
+- Support esbuild options for @sveltejs/adapter-cloudflare-workers
+- Fix an issue related to prerendered pages incorrectly resolving in @sveltejs/adapter-cloudflare-workers

packages/adapter-cloudflare-workers/ambient.d.ts

@@ -6,7 +6,7 @@ declare module 'MANIFEST' {
 	import { SSRManifest } from '@sveltejs/kit';
 
 	export const manifest: SSRManifest;
-	export const prerendered: Set<string>;
+	export const prerendered: Map<string, { file: string }>;
 }
 
 declare module '__STATIC_CONTENT_MANIFEST' {

packages/adapter-cloudflare-workers/files/entry.js

@@ -1,6 +1,6 @@
 import { Server } from 'SERVER';
 import { manifest, prerendered } from 'MANIFEST';
-import { getAssetFromKV } from '@cloudflare/kv-asset-handler';
+import { getAssetFromKV, mapRequestToAsset } from '@cloudflare/kv-asset-handler';
 import static_asset_manifest_json from '__STATIC_CONTENT_MANIFEST';
 const static_asset_manifest = JSON.parse(static_asset_manifest_json);
 
@@ -83,8 +83,15 @@ async function get_asset_from_kv(req, env, context) {
 			},
 			{
 				ASSET_NAMESPACE: env.__STATIC_CONTENT,
-				ASSET_MANIFEST: static_asset_manifest
-			}
+				ASSET_MANIFEST: static_asset_manifest,
+        mapRequestToAsset(request, options) {
+          if (prerendered.has(pathname || '/')) {
+            url.pathname = '/' + prerendered.get(pathname || '/').file;
+            return new Request(url.toString(), request);
+          }
+          return mapRequestToAsset(request, options);
+        }
+      }
 		);
 	} catch (e) {
 		const status = is_error(e.status) ? e.status : 500;

packages/adapter-cloudflare-workers/index.js

@@ -49,7 +49,9 @@ export default function (options = {}) {
 				`${tmp}/manifest.js`,
 				`export const manifest = ${builder.generateManifest({
 					relativePath
-				})};\n\nexport const prerendered = new Set(${JSON.stringify(builder.prerendered.paths)});\n`
+				})};\n\nexport const prerendered = new Map(${JSON.stringify(
+					Array.from(builder.prerendered.pages.entries())
+				)});\n`
 			);
 
 			await esbuild.build({