fix demo site

Author: ota-meshi

svelte.config.mjs

@@ -2,6 +2,11 @@ import ghpagesAdapter from "svelte-adapter-ghpages"
 import path from "path"
 import fs from "fs"
 
+// eslint-disable-next-line no-undef -- There seems to be a package that uses `self`.
+if (typeof self === "undefined") {
+  globalThis.self = globalThis
+}
+
 const dirname = path.dirname(new URL(import.meta.url).pathname)
 
 // This project can't be ESM yet, so hack it to get svelte-kit to work.

vite.config.mts

@@ -58,6 +58,10 @@ const config: UserConfig = {
         "./node_modules/eslint-visitor-keys/dist/eslint-visitor-keys.cjs",
       ),
       espree: path.join(dirname, "./node_modules/espree/dist/espree.cjs"),
+      "eslint-scope": path.join(
+        dirname,
+        "./node_modules/eslint-scope/dist/eslint-scope.cjs",
+      ),
       acorn: path.join(dirname, "./node_modules/acorn/dist/acorn.js"),
     },
   },