Solution 1

https://stackoverflow.com/questions/39927452/recursively-print-all-permutations-of-a-string-javascript

Solution 2

https://www.reddit.com/r/javascript/comments/5fjbgy/recursion_in_javascript_to_find_permutations_of_a/

Solution 3

https://medium.com/@lindagmorales94/how-to-solve-a-string-permutation-problem-using-javascript-95ad5c388219

Solution 4