Better but still not right, you're misusing the method inside your if condition. That's all the help I can give you without solving it for you, check how to use it in MDN or some other place.

No, you don't. Read this: https://docs.codewars.com/training/troubleshooting/#works-but-no

You're printing the right result to the console, but your function should return it, not print it.

Read about the methods you want to use, you're using it wrong too.