Mutations challenge frustration - Js Basic Algorithms

Tell us what’s happening:
My code meets all conditions except the first one, until, when I remove the spread operator (…), then the first condition is met, but all the rest is false again.

Your code so far

function mutation(arr) {
  return arr[0].split('').includes(...arr[1].toLowerCase().split(''));

mutation(["hello", "hey"]);

Your browser information:

User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/71.0.3578.98 Safari/537.36.

Link to the challenge:

You’re mistaken how includes works.

arr.includes(valueToFind[, fromIndex])

Works with single values not an array of values.