[fix] allow SvelteKit to be used without bundling

.changeset/slow-files-stare.md

@@ -0,0 +1,6 @@
+---
+'@sveltejs/environment': patch
+'@sveltejs/kit': patch
+---
+
+[feat] @sveltejs/environment

packages/environment/README.md

@@ -0,0 +1,19 @@
+# @sveltejs/adapter-node
+
+Package which uses export conditions to return environment information in a way that works with major bundlers and runtimes.
+
+## Usage
+
+Install with `npm install @sveltejs/environment`, then import as needed:
+
+```js
+// svelte.config.js
+import { DEV, SSR } from '@sveltejs/environment';
+```
+## Changelog
+
+[The Changelog for this package is available on GitHub](https://github.com/sveltejs/kit/blob/master/packages/environment/CHANGELOG.md).
+
+## License
+
+[MIT](LICENSE)

packages/environment/dev-browser.js

@@ -0,0 +1,2 @@
+export const SSR = false;
+export const DEV = true;

packages/environment/dev-ssr.js

@@ -0,0 +1,2 @@
+export const SSR = true;
+export const DEV = true;

packages/environment/package.json

@@ -0,0 +1,25 @@
+{
+	"name": "@sveltejs/environment",
+	"version": "1.0.0-next.1",
+	"repository": {
+		"type": "git",
+		"url": "https://github.com/sveltejs/kit",
+		"directory": "packages/environment"
+	},
+	"license": "MIT",
+	"homepage": "https://github.com/sveltejs/kit/blob/master/packages/environment/CHANGELOG.md",
+	"type": "module",
+	"exports": {
+		".": {
+			"browser": {
+				"development": "./dev-browser.js",
+				"default": "./prod-browser.js"
+			},
+			"default": {
+				"development": "./dev-ssr.js",
+				"default": "./prod-ssr.js"
+			}
+		},
+		"./package.json": "./package.json"
+	}
+}

packages/environment/prod-browser.js

@@ -0,0 +1,2 @@
+export const SSR = false;
+export const DEV = false;

packages/environment/prod-ssr.js

@@ -0,0 +1,2 @@
+export const SSR = true;
+export const DEV = false;

packages/kit/package.json

@@ -10,6 +10,7 @@
 	"homepage": "https://kit.svelte.dev",
 	"type": "module",
 	"dependencies": {
+		"@sveltejs/environment": "workspace:*",
 		"@sveltejs/vite-plugin-svelte": "^1.3.1",
 		"@types/cookie": "^0.5.1",
 		"cookie": "^0.5.0",

packages/kit/src/runtime/app/environment.js

@@ -1,7 +1,9 @@
+import { SSR } from '@sveltejs/environment';
+
 /**
  * @type {import('$app/environment').browser}
  */
-export const browser = !import.meta.env.SSR;
+export const browser = !SSR;
 
 /**
  * @type {import('$app/environment').dev}

packages/kit/src/runtime/app/forms.js

@@ -1,6 +1,7 @@
 import * as devalue from 'devalue';
 import { client } from '../client/singletons.js';
 import { invalidateAll } from './navigation.js';
+import { SSR } from '@sveltejs/environment';
 
 /**
  * @param {string} name
@@ -11,10 +12,8 @@ function guard(name) {
 	};
 }
 
-const ssr = import.meta.env.SSR;
-
 /** @type {import('$app/forms').applyAction} */
-export const applyAction = ssr ? guard('applyAction') : client.apply_action;
+export const applyAction = SSR ? guard('applyAction') : client.apply_action;
 
 /** @type {import('$app/forms').deserialize} */
 export function deserialize(result) {

packages/kit/src/runtime/app/navigation.js

@@ -1,3 +1,4 @@
+import { SSR } from '@sveltejs/environment';
 import { client } from '../client/singletons.js';
 
 /**
@@ -9,18 +10,16 @@ function guard(name) {
 	};
 }
 
-const ssr = import.meta.env.SSR;
-
-export const disableScrollHandling = ssr
+export const disableScrollHandling = SSR
 	? guard('disableScrollHandling')
 	: client.disable_scroll_handling;
-export const goto = ssr ? guard('goto') : client.goto;
-export const invalidate = ssr ? guard('invalidate') : client.invalidate;
-export const invalidateAll = ssr ? guard('invalidateAll') : client.invalidateAll;
-export const preloadData = ssr ? guard('preloadData') : client.preload_data;
-export const preloadCode = ssr ? guard('preloadCode') : client.preload_code;
-export const beforeNavigate = ssr ? () => {} : client.before_navigate;
-export const afterNavigate = ssr ? () => {} : client.after_navigate;
+export const goto = SSR ? guard('goto') : client.goto;
+export const invalidate = SSR ? guard('invalidate') : client.invalidate;
+export const invalidateAll = SSR ? guard('invalidateAll') : client.invalidateAll;
+export const preloadData = SSR ? guard('preloadData') : client.preload_data;
+export const preloadCode = SSR ? guard('preloadCode') : client.preload_code;
+export const beforeNavigate = SSR ? () => {} : client.before_navigate;
+export const afterNavigate = SSR ? () => {} : client.after_navigate;
 
 // TODO remove for 1.0 release
 /** @param {any} _args */

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

@@ -1,3 +1,4 @@
+import { DEV } from '@sveltejs/environment';
 import { onMount, tick } from 'svelte';
 import {
 	make_trackable,
@@ -668,7 +669,7 @@ export function create_client({ target, base }) {
 				}
 			});
 
-			if (import.meta.env.DEV) {
+			if (DEV) {
 				try {
 					lock_fetch();
 					data = (await node.shared.load.call(null, load_input)) ?? null;
@@ -1293,7 +1294,7 @@ export function create_client({ target, base }) {
 		},
 
 		disable_scroll_handling: () => {
-			if (import.meta.env.DEV && started && !updating) {
+			if (DEV && started && !updating) {
 				throw new Error('Can only disable scroll handling during navigation');
 			}
 

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

@@ -1,3 +1,4 @@
+import { DEV } from '@sveltejs/environment';
 import { hash } from '../hash.js';
 
 let loading = 0;
@@ -12,7 +13,7 @@ export function unlock_fetch() {
 	loading -= 1;
 }
 
-if (import.meta.env.DEV) {
+if (DEV) {
 	let can_inspect_stack_trace = false;
 
 	const check_stack_trace = async () => {

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

@@ -1,3 +1,4 @@
+import { DEV, SSR } from '@sveltejs/environment';
 import { writable } from 'svelte/store';
 import { assets } from '../paths.js';
 import { version } from '../env.js';
@@ -209,7 +210,7 @@ export function create_updated_store() {
 	let timeout;
 
 	async function check() {
-		if (import.meta.env.DEV || import.meta.env.SSR) return false;
+		if (DEV || SSR) return false;
 
 		clearTimeout(timeout);