set remote_responses lazily

Author: Rich-Harris

packages/kit/src/runtime/client/client.js

@@ -189,11 +189,11 @@ let target;
 /** @type {import('./types.js').SvelteKitApp} */
 export let app;
 
-/** @type {Record<string, any>} */
 // we have to conditionally access the properties of `__SVELTEKIT_PAYLOAD__`
 // because it will be `undefined` when users import the exports from this module.
 // It's only defined when the server renders a page.
-export const remote_responses = __SVELTEKIT_PAYLOAD__?.data ?? {};
+/** @type {Record<string, any>} */
+export let remote_responses = {};
 
 /** @type {Array<((url: URL) => boolean)>} */
 const invalidated = [];
@@ -294,6 +294,10 @@ export async function start(_app, _target, hydrate) {
 		);
 	}
 
+	if (__SVELTEKIT_PAYLOAD__.data) {
+		remote_responses = __SVELTEKIT_PAYLOAD__?.data;
+	}
+
 	// detect basic auth credentials in the current URL
 	// https://github.com/sveltejs/kit/pull/11179
 	// if so, refresh the page without credentials