Add linting

devenv.nix

@@ -11,6 +11,12 @@
     npm run watch
   '';
 
+  scripts.copy-to-ha.exec = ''
+    npm run build
+    sudo cp dist/map-card.js /var/lib/hass/www
+  '';
+
+
   scripts.get-version.exec = ''
     jq -r '.version' package.json
   '';
@@ -30,11 +36,17 @@
 
     sed -i "s/HA_MAP_CARD_VERSION/$VERSION/" dist/map-card.js
     echo $VERSION
+
+    git tag v$VERSION
   '';
 
   enterShell = ''
     npm install
   '';
+
+  enterTest = ''
+    npm run lint
+  '';
 
 
 }

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,
+];