Anagram or not.js

/*
"Any word or phrase that exactly reproduces the letters in another order is an anagram." (Wikipedia). Add numbers to this definition to be more interest.

Examples of anagrams:

William Shakespeare = I am a weakish speller
silent = listen
12345 = 54321
The challenge is to write the function isAnagram to return True if the word test is an anagram of the word original and False if not.

Note: Anagrams are case insensitive, ignore all non-alphanumeric characters, input will always be two strings. Also: two identical words may be considered to be an edge case of an anagram, but for this kata they are still correct anagrams.
*/
function isAnagram(test, original){
  test=test.toLowerCase().replace(/[^0-9a-z]/g,'')
  original=original.toLowerCase().replace(/[^0-9a-z]/g,'')
  return test.split``.sort((a,b)=>a.localeCompare(b)).join``===original.split``.sort((a,b)=>a.localeCompare(b)).join``
}