remove non-browser code from browser builds

.changeset/real-taxis-march.md

@@ -0,0 +1,5 @@
+---
+'@sveltejs/kit': patch
+---
+
+Enable removal of non-browser code from client builds

packages/kit/src/exports/vite/build/utils.js

@@ -136,6 +136,7 @@ export function get_default_build_config({ config, input, ssr, outDir }) {
 			__SVELTEKIT_APP_VERSION__: JSON.stringify(config.kit.version.name),
 			__SVELTEKIT_APP_VERSION_FILE__: JSON.stringify(`${config.kit.appDir}/version.json`),
 			__SVELTEKIT_APP_VERSION_POLL_INTERVAL__: JSON.stringify(config.kit.version.pollInterval),
+			__SVELTEKIT_BROWSER__: ssr ? 'false' : 'true',
 			__SVELTEKIT_DEV__: 'false'
 		},
 		publicDir: ssr ? false : config.kit.files.assets,

packages/kit/src/exports/vite/index.js

@@ -249,8 +249,9 @@ function kit() {
 					}
 				},
 				define: {
-					__SVELTEKIT_DEV__: 'true',
-					__SVELTEKIT_APP_VERSION_POLL_INTERVAL__: '0'
+					__SVELTEKIT_APP_VERSION_POLL_INTERVAL__: '0',
+					__SVELTEKIT_BROWSER__: !config_env.ssrBuild,
+					__SVELTEKIT_DEV__: 'true'
 				},
 				publicDir: svelte_config.kit.files.assets,
 				resolve: {

packages/kit/src/utils/url.js

@@ -103,10 +103,12 @@ export function make_trackable(url, callback) {
 		});
 	}
 
-	// @ts-ignore
-	tracked[Symbol.for('nodejs.util.inspect.custom')] = (depth, opts, inspect) => {
-		return inspect(url, opts);
-	};
+	if (!__SVELTEKIT_BROWSER__) {
+		// @ts-ignore
+		tracked[Symbol.for('nodejs.util.inspect.custom')] = (depth, opts, inspect) => {
+			return inspect(url, opts);
+		};
+	}
 
 	disable_hash(tracked);
 

packages/kit/types/internal.d.ts

@@ -375,5 +375,6 @@ declare global {
 	const __SVELTEKIT_APP_VERSION__: string;
 	const __SVELTEKIT_APP_VERSION_FILE__: string;
 	const __SVELTEKIT_APP_VERSION_POLL_INTERVAL__: number;
+	const __SVELTEKIT_BROWSER__: boolean;
 	const __SVELTEKIT_DEV__: boolean;
 }