Generate sourcemaps (#5258)

* Generate sourcemaps

* Update slimy-carpets-smash.md

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

Author: benmccann

.changeset/slimy-carpets-smash.md

@@ -0,0 +1,7 @@
+---
+'@sveltejs/adapter-cloudflare': patch
+'@sveltejs/adapter-cloudflare-workers': patch
+'@sveltejs/adapter-netlify': patch
+---
+
+Generate sourcemaps for server-side functions when bundling with esbuild

packages/adapter-cloudflare-workers/index.js

@@ -55,8 +55,9 @@ export default function (options = {}) {
 			);
 
 			await esbuild.build({
-				target: 'es2020',
 				platform: 'browser',
+				sourcemap: 'linked',
+				target: 'es2020',
 				...options,
 				entryPoints: [`${tmp}/entry.js`],
 				outfile: main,

packages/adapter-cloudflare/index.js

@@ -37,8 +37,9 @@ export default function (options = {}) {
 			});
 
 			await esbuild.build({
-				target: 'es2020',
 				platform: 'browser',
+				sourcemap: 'linked',
+				target: 'es2020',
 				...options,
 				entryPoints: [`${tmp}/_worker.js`],
 				outfile: `${dest}/_worker.js`,

packages/adapter-netlify/index.js

@@ -137,8 +137,9 @@ async function generate_edge_functions({ builder }) {
 		outfile: '.netlify/edge-functions/render.js',
 		bundle: true,
 		format: 'esm',
-		target: 'es2020',
-		platform: 'browser'
+		platform: 'browser',
+		sourcemap: 'linked',
+		target: 'es2020'
 	});
 
 	writeFileSync('.netlify/edge-functions/manifest.json', JSON.stringify(edge_manifest));