Challenge: Anagram Problem
Explore how to create a JavaScript function that determines if two input strings are anagrams regardless of case. Learn to return meaningful results and test your code using sample inputs and console outputs to validate your solution.
Task
Write a function that accepts two strings as parameters and checks whether these strings are anagrams of each other. An anagram is a text formed by rearranging the letters of another piece of text.
The strings should not be case-sensitive, meaning that Cats and AcTs are anagrams.
The function should return 1 when the strings are anagrams and -1 otherwise.