fix: fix #13

lib/GMLIB_API-JS.js

@@ -237,6 +237,9 @@ class Minecraft {
 
     static getPlayerNbt(uuid) {
         let snbt = GMLIB_API.getPlayerNbt(uuid);
+        if (snbt == "null") {
+            return null;
+        }
         let nbt = NBT.parseSNBT(snbt);
         return nbt;
     }

src/CompatibilityApi.cpp

@@ -27,7 +27,11 @@ void Export_Compatibility_API() {
     });
     RemoteCall::exportAs("GMLIB_API", "getPlayerNbt", [](std::string uuid) -> std::string {
         auto uid = mce::UUID::fromString(uuid);
-        return GMLIB_Player::getPlayerNbt(uid)->toSnbt();
+        auto nbt = GMLIB_Player::getPlayerNbt(uid);
+        if (nbt) {
+            return nbt->toSnbt();
+        }
+        return "null";
     });
     RemoteCall::exportAs("GMLIB_API", "setPlayerNbt", [](std::string uuid, std::string snbt) -> bool {
         auto uid = mce::UUID::fromString(uuid);