diff --git a/rollup.config.js b/rollup.config.js
index 6972fad..90e1f45 100644
--- a/rollup.config.js
+++ b/rollup.config.js
@@ -35,7 +35,7 @@ function template(kind, external) {
 }
 
 export default [
-	template('client', []),
+	template('client', ['__ROOT__', '__ERROR__']),
 	template('server', builtinModules),
 
 	{
diff --git a/src/core/create_manifests.ts b/src/core/create_manifests.ts
index d3e9ac8..f3d9441 100644
--- a/src/core/create_manifests.ts
+++ b/src/core/create_manifests.ts
@@ -75,62 +75,57 @@ function generate_client(
 
 	const component_indexes: Record<string, number> = {};
 
-	let code = `
-		import root from ${stringify(get_file(path_to_routes, manifest_data.root))};
-		import error from ${stringify(posixify(`${path_to_routes}/_error.html`))};
+	const components = `[
+		${manifest_data.components.map((component, i) => {
+			const annotation = bundler === 'webpack'
+				? `/* webpackChunkName: "${component.name}" */ `
+				: '';
 
-		const d = decodeURIComponent;
+			const source = get_file(path_to_routes, component);
 
-		const components = [
-			${manifest_data.components.map((component, i) => {
-				const annotation = bundler === 'webpack'
-					? `/* webpackChunkName: "${component.name}" */ `
-					: '';
+			component_indexes[component.name] = i;
 
-				const source = get_file(path_to_routes, component);
+			return `{
+			js: () => import(${annotation}${stringify(source)}),
+			css: "__SAPPER_CSS_PLACEHOLDER:${stringify(component.file, false)}__"
+		}`;
+		}).join(',\n\t\t')}
+	]`.replace(/^\t/gm, '').trim();
 
-				component_indexes[component.name] = i;
+	let needs_decode = false;
 
-				return `{
-				js: () => import(${annotation}${stringify(source)}),
-				css: "__SAPPER_CSS_PLACEHOLDER:${stringify(component.file, false)}__"
-			}`;
-			}).join(',\n\t\t\t')}
-		];
+	let pages = `[
+		${manifest_data.pages.map(page => `{
+			// ${page.parts[page.parts.length - 1].component.file}
+			pattern: ${page.pattern},
+			parts: [
+				${page.parts.map(part => {
+					if (part === null) return 'null';
 
-		const manifest = {
-			ignore: [${server_routes_to_ignore.map(route => route.pattern).join(', ')}],
+					if (part.params.length > 0) {
+						needs_decode = true;
+						const props = part.params.map((param, i) => `${param}: d(match[${i + 1}])`);
+						return `{ i: ${component_indexes[part.component.name]}, params: match => ({ ${props.join(', ')} }) }`;
+					}
 
-			pages: [
-				${manifest_data.pages.map(page => `{
-					// ${page.parts[page.parts.length - 1].component.file}
-					pattern: ${page.pattern},
-					parts: [
-						${page.parts.map(part => {
-							if (part === null) return 'null';
+					return `{ i: ${component_indexes[part.component.name]} }`;
+				}).join(',\n\t\t\t\t')}
+			]
+		}`).join(',\n\n\t\t')}
+	]`.replace(/^\t/gm, '').trim();
 
-							if (part.params.length > 0) {
-								const props = part.params.map((param, i) => `${param}: d(match[${i + 1}])`);
-								return `{ component: components[${component_indexes[part.component.name]}], params: match => ({ ${props.join(', ')} }) }`;
-							}
+	if (needs_decode) {
+		pages = `(d => ${pages})(decodeURIComponent)`
+	}
 
-							return `{ component: components[${component_indexes[part.component.name]}] }`;
-						}).join(',\n\t\t\t\t\t\t')}
-					]
-				}`).join(',\n\n\t\t\t\t')}
-			],
-
-			root,
-
-			error
-		};`.replace(/^\t\t/gm, '').trim();
+	let footer = '';
 
 	if (dev()) {
 		const sapper_dev_client = posixify(
 			path.resolve(__dirname, '../sapper-dev-client.js')
 		);
 
-		code += `
+		footer = `
 
 			import(${stringify(sapper_dev_client)}).then(client => {
 				client.connect(${dev_port});
@@ -138,7 +133,12 @@ function generate_client(
 	}
 
 	return `// This file is generated by Sapper — do not edit it!\n` + template
-		.replace(/const manifest = __MANIFEST__;/, code);
+		.replace('__ROOT__', stringify(get_file(path_to_routes, manifest_data.root), false))
+		.replace('__ERROR__', stringify(posixify(`${path_to_routes}/_error.html`), false))
+		.replace('__IGNORE__', `[${server_routes_to_ignore.map(route => route.pattern).join(', ')}]`)
+		.replace('__COMPONENTS__', components)
+		.replace('__PAGES__', pages) +
+		footer;
 }
 
 function generate_server(
diff --git a/templates/src/client/app.ts b/templates/src/client/app.ts
index db1e644..9456a63 100644
--- a/templates/src/client/app.ts
+++ b/templates/src/client/app.ts
@@ -1,7 +1,20 @@
-import { Manifest, Target, ScrollPosition, Component, Redirect, ComponentLoader, ComponentConstructor, RootProps } from './types';
+import RootComponent from '__ROOT__';
+import ErrorComponent from '__ERROR__';
+import {
+	Target,
+	ScrollPosition,
+	Component,
+	Redirect,
+	ComponentLoader,
+	ComponentConstructor,
+	RootProps,
+	Page
+} from './types';
 import goto from './goto';
 
-export const manifest: Manifest = __MANIFEST__;
+const ignore = __IGNORE__;
+export const components: ComponentLoader[] = __COMPONENTS__;
+export const pages: Page[] = __PAGES__;
 
 let ready = false;
 let root_component: Component;
@@ -61,16 +74,16 @@ export { _history as history };
 export const scroll_history: Record<string, ScrollPosition> = {};
 
 export function select_route(url: URL): Target {
-	if (url.origin !== window.location.origin) return null;
+	if (url.origin !== location.origin) return null;
 	if (!url.pathname.startsWith(initial_data.baseUrl)) return null;
 
 	const path = url.pathname.slice(initial_data.baseUrl.length);
 
 	// avoid accidental clashes between server routes and pages
-	if (manifest.ignore.some(pattern => pattern.test(path))) return;
+	if (ignore.some(pattern => pattern.test(path))) return;
 
-	for (let i = 0; i < manifest.pages.length; i += 1) {
-		const page = manifest.pages[i];
+	for (let i = 0; i < pages.length; i += 1) {
+		const page = pages[i];
 
 		const match = page.pattern.exec(path);
 		if (match) {
@@ -88,8 +101,8 @@ export function select_route(url: URL): Target {
 
 export function scroll_state() {
 	return {
-		x: window.scrollX,
-		y: window.scrollY
+		x: scrollX,
+		y: scrollY
 	};
 }
 
@@ -159,7 +172,7 @@ function render(data: any, nullable_depth: number, scroll: ScrollPosition, token
 
 		Object.assign(data, root_data);
 
-		root_component = new manifest.root({
+		root_component = new RootComponent({
 			target,
 			data,
 			store,
@@ -168,7 +181,7 @@ function render(data: any, nullable_depth: number, scroll: ScrollPosition, token
 	}
 
 	if (scroll) {
-		window.scrollTo(scroll.x, scroll.y);
+		scrollTo(scroll.x, scroll.y);
 	}
 
 	Object.assign(root_props, data);
@@ -195,7 +208,7 @@ export function prepare_page(target: Target): Promise<{
 
 	const preload_context = {
 		store,
-		fetch: (url: string, opts?: any) => window.fetch(url, opts),
+		fetch: (url: string, opts?: any) => fetch(url, opts),
 		redirect: (statusCode: number, location: string) => {
 			if (redirect && (redirect.statusCode !== statusCode || redirect.location !== location)) {
 				throw new Error(`Conflicting redirects`);
@@ -208,8 +221,8 @@ export function prepare_page(target: Target): Promise<{
 	};
 
 	if (!root_preload) {
-		root_preload = manifest.root.preload
-			? initial_data.preloaded[0] || manifest.root.preload.call(preload_context, {
+		root_preload = RootComponent.preload
+			? initial_data.preloaded[0] || RootComponent.preload.call(preload_context, {
 				path,
 				query,
 				params: {}
@@ -221,7 +234,7 @@ export function prepare_page(target: Target): Promise<{
 		if (i < changed_from) return null;
 		if (!part) return null;
 
-		return load_component(part.component).then(Component => {
+		return load_component(components[part.i]).then(Component => {
 			const req = {
 				path,
 				query,
@@ -276,7 +289,7 @@ export function prepare_page(target: Target): Promise<{
 				data: Object.assign({}, props, {
 					preloading: false,
 					child: {
-						component: manifest.error,
+						component: ErrorComponent,
 						props
 					}
 				})
diff --git a/templates/src/client/goto/index.ts b/templates/src/client/goto/index.ts
index 547c6e2..0f58786 100644
--- a/templates/src/client/goto/index.ts
+++ b/templates/src/client/goto/index.ts
@@ -8,7 +8,7 @@ export default function goto(href: string, opts = { replaceState: false }) {
 		promise = navigate(target, null).then(() => {});
 		if (history) history[opts.replaceState ? 'replaceState' : 'pushState']({ id: cid }, '', href);
 	} else {
-		window.location.href = href;
+		location.href = href;
 		promise = new Promise(f => {}); // never resolves
 	}
 
diff --git a/templates/src/client/prefetchRoutes/index.ts b/templates/src/client/prefetchRoutes/index.ts
index 8ed7a48..b3c2f3c 100644
--- a/templates/src/client/prefetchRoutes/index.ts
+++ b/templates/src/client/prefetchRoutes/index.ts
@@ -1,14 +1,12 @@
-import { manifest, load_component } from "../app";
+import { components, pages, load_component } from "../app";
 
 export default function prefetchRoutes(pathnames: string[]) {
-	if (!manifest) throw new Error(`You must call init() first`);
-
-	return manifest.pages
+	return pages
 		.filter(route => {
 			if (!pathnames) return true;
 			return pathnames.some(pathname => route.pattern.test(pathname));
 		})
 		.reduce((promise: Promise<any>, route) => promise.then(() => {
-			return Promise.all(route.parts.map(part => part && load_component(part.component)));
+			return Promise.all(route.parts.map(part => part && load_component(components[part.i])));
 		}), Promise.resolve());
 }
\ No newline at end of file
diff --git a/templates/src/client/start/index.ts b/templates/src/client/start/index.ts
index 1a26ca9..240fdd8 100644
--- a/templates/src/client/start/index.ts
+++ b/templates/src/client/start/index.ts
@@ -26,15 +26,15 @@ export default function start(opts: {
 	set_target(opts.target);
 	if (opts.store) set_store(opts.store);
 
-	window.addEventListener('click', handle_click);
-	window.addEventListener('popstate', handle_popstate);
+	addEventListener('click', handle_click);
+	addEventListener('popstate', handle_popstate);
 
 	// prefetch
-	window.addEventListener('touchstart', trigger_prefetch);
-	window.addEventListener('mousemove', handle_mousemove);
+	addEventListener('touchstart', trigger_prefetch);
+	addEventListener('mousemove', handle_mousemove);
 
 	return Promise.resolve().then(() => {
-		const { hash, href } = window.location;
+		const { hash, href } = location;
 
 		const deep_linked = hash && document.getElementById(hash.slice(1));
 		scroll_history[uid] = deep_linked ?
@@ -44,7 +44,7 @@ export default function start(opts: {
 		history.replaceState({ id: uid }, '', href);
 
 		if (!initial_data.error) {
-			const target = select_route(new URL(window.location.href));
+			const target = select_route(new URL(location.href));
 			if (target) return navigate(target, uid);
 		}
 	});
@@ -83,7 +83,7 @@ function handle_click(event: MouseEvent) {
 	const svg = typeof a.href === 'object' && a.href.constructor.name === 'SVGAnimatedString';
 	const href = String(svg ? (<SVGAElement>a).href.baseVal : a.href);
 
-	if (href === window.location.href) {
+	if (href === location.href) {
 		event.preventDefault();
 		return;
 	}
@@ -99,7 +99,7 @@ function handle_click(event: MouseEvent) {
 	const url = new URL(href);
 
 	// Don't handle hash changes
-	if (url.pathname === window.location.pathname && url.search === window.location.search) return;
+	if (url.pathname === location.pathname && url.search === location.search) return;
 
 	const target = select_route(url);
 	if (target) {
@@ -122,17 +122,17 @@ function handle_popstate(event: PopStateEvent) {
 	scroll_history[cid] = scroll_state();
 
 	if (event.state) {
-		const url = new URL(window.location.href);
+		const url = new URL(location.href);
 		const target = select_route(url);
 		if (target) {
 			navigate(target, event.state.id);
 		} else {
-			window.location.href = window.location.href;
+			location.href = location.href;
 		}
 	} else {
 		// hashchange
 		set_uid(uid + 1);
 		set_cid(uid);
-		history.replaceState({ id: cid }, '', window.location.href);
+		history.replaceState({ id: cid }, '', location.href);
 	}
 }
\ No newline at end of file
diff --git a/templates/src/client/types.ts b/templates/src/client/types.ts
index 647a94a..08e7a04 100644
--- a/templates/src/client/types.ts
+++ b/templates/src/client/types.ts
@@ -33,7 +33,7 @@ export type ComponentLoader = {
 export type Page = {
 	pattern: RegExp;
 	parts: Array<{
-		component: ComponentLoader;
+		i: number;
 		params?: (match: RegExpExecArray) => Record<string, string>;
 	}>;
 };