diff --git a/web/src/components/label-editor.test.tsx b/web/src/components/label-editor.test.tsx
index 47d22c9..35bf81c 100644
--- a/web/src/components/label-editor.test.tsx
+++ b/web/src/components/label-editor.test.tsx
@@ -26,7 +26,7 @@ test("typing EN and SV emits both labels; empty langs are omitted", async () =>
   renderApp(<Harness onChange={(v) => seen.push(v)} />);
   await userEvent.type(screen.getByLabelText(/label \(en\)/i), "Bronze");
   await userEvent.type(screen.getByLabelText(/label \(sv\)/i), "Brons");
-  const last = seen.at(-1)!;
+  const last = seen[seen.length - 1]!;
   expect(last).toEqual(
     expect.arrayContaining([
       { lang: "en", label: "Bronze" },
diff --git a/web/src/components/label-editor.tsx b/web/src/components/label-editor.tsx
index 3636382..1c07bc7 100644
--- a/web/src/components/label-editor.tsx
+++ b/web/src/components/label-editor.tsx
@@ -21,7 +21,7 @@ export function LabelEditor({
   const set = (lang: string, label: string) => {
     const others = value.filter((l) => l.lang !== lang);
 
-    onChange(label ? [...others, { lang, label }] : others);
+    onChange(label.trim() ? [...others, { lang, label }] : others);
   };
 
   return (
diff --git a/web/tsconfig.app.json b/web/tsconfig.app.json
index 97295a4..cc58243 100644
--- a/web/tsconfig.app.json
+++ b/web/tsconfig.app.json
@@ -1,9 +1,9 @@
 {
   "compilerOptions": {
     "tsBuildInfoFile": "./node_modules/.tmp/tsconfig.app.tsbuildinfo",
-    "target": "ES2022",
+    "target": "ES2020",
     "useDefineForClassFields": true,
-    "lib": ["ES2022", "DOM", "DOM.Iterable"],
+    "lib": ["ES2020", "DOM", "DOM.Iterable"],
     "module": "ESNext",
     "skipLibCheck": true,