Merge pull request #109 from preactjs/refactor/clean-some-sourcemaps

refactor: Clean sourcemaps in newer Vite versions

src/prerender.ts

@@ -76,6 +76,7 @@ export function PrerenderPlugin({
 }: PrerenderPluginOptions = {}): Plugin {
 	const preloadHelperId = "vite/preload-helper";
 	let viteConfig = {} as ResolvedConfig;
+	let userEnabledSourceMaps: boolean | undefined;
 
 	renderTarget ||= "body";
 	additionalPrerenderRoutes ||= [];
@@ -118,6 +119,7 @@ export function PrerenderPlugin({
 		apply: "build",
 		enforce: "post",
 		configResolved(config) {
+			userEnabledSourceMaps = !!config.build.sourcemap;
 			// Enable sourcemaps for generating more actionable error messages
 			config.build.sourcemap = true;
 
@@ -219,6 +221,11 @@ export function PrerenderPlugin({
 
 			let prerenderEntry: OutputChunk | undefined;
 			for (const output of Object.keys(bundle)) {
+				// Clean up source maps if the user didn't enable them themselves
+				if (/\.map$/.test(output) && !userEnabledSourceMaps) {
+					delete bundle[output];
+					continue;
+				}
 				if (!/\.js$/.test(output) || bundle[output].type !== "chunk") continue;
 
 				await fs.writeFile(