I'm perplexed...can someone clear this up for me???

gistfile1.txt

// Write a function called "removeFromBackOfNew".

// Given an array, "removeFromBackOfNew" returns a new array containing all but the last element of the given array.



var arr = [1, 2, 3];


function removeFromBackOfNew(arr) {
    var newArr = arr.slice([0], [2]);
    return newArr;
}

// When I run test it says the 'last element in the passed array must be removed.'

// var output = removeFromBackOfNew(arr); <--- This is
// console.log(output); // --> [1, 2] <------- the desired
// console.log(arr); // --> [1, 2, 3] <------- result.