update tag

src/wanikani.ts

@@ -19,7 +19,7 @@ export class WaniKani {
     });
   }
 
-  static getLevelLabel(level: number): ILevelLabel {
+  static getLevelLabel(level: number): ILevelLabel | null {
     if (level < 11) {
       return {
         range: '01-10',
@@ -58,7 +58,7 @@ export class WaniKani {
       };
     }
 
-    throw new Error(`invalid level: ${level}`);
+    return null;
   }
 
   async subjects({
@@ -303,9 +303,13 @@ export class WaniKani {
     >();
     vocabularies.map((v) => {
       if (vocabMap.has(v.data.characters)) return;
+      const level = v.data.level;
+      const label = WaniKani.getLevelLabel(level);
+      if (!label) throw new Error(`Invalid level: ${level}`);
+
       vocabMap.set(v.data.characters, {
-        level: v.data.level,
-        label: WaniKani.getLevelLabel(v.data.level),
+        level,
+        label,
       });
     });
     if (!vocabMap.size) return;