use local version of svelte (#1009)

Author: Rich-Harris

apps/svelte.dev/static/svelte

@@ -0,0 +1 @@
+../node_modules/svelte

packages/editor/src/lib/compile-worker/worker.ts

@@ -13,7 +13,7 @@ declare var self: Window & typeof globalThis & { svelte: typeof import('svelte/c
 let inited: PromiseWithResolvers<typeof self.svelte>;
 
 async function init(v: string) {
-	const svelte_url = `https://unpkg.com/svelte@${v}`;
+	const svelte_url = v === 'local' ? '/svelte' : `https://unpkg.com/svelte@${v}`;
 	const match = /^(?:pr|commit)-(.+)/.exec(v);
 
 	let tarball: FileDescription[] | undefined;

packages/repl/src/lib/workers/bundler/index.ts

@@ -56,6 +56,9 @@ async function init(v: string, packages_url: string) {
 			const url = `${svelte_url}/${file.name.slice('package/'.length)}`;
 			FETCH_CACHE.set(url, Promise.resolve({ url, body: file.text }));
 		}
+	} else if (v === 'local') {
+		version = v;
+		svelte_url = `/svelte`;
 	} else {
 		const response = await fetch(`${packages_url}/svelte@${v}/package.json`);
 		const pkg = await response.json();