LINTING:

- Added eslint.
- Cleaned up lexical declarations in case clauses.

web/eslint.config.mjs

@@ -0,0 +1,8 @@
+import globals from "globals";
+import pluginJs from "@eslint/js";
+
+
+export default [
+  {languageOptions: { globals: globals.browser }},
+  pluginJs.configs.recommended,
+];