Immutable - change elements in array with slice (no splice)

Question

How is possible to change 3/4 elements? Expected output is [1,2,4,3,5]

let list = [1,2,3,4,5];
const removeElement = list.indexOf(3); // remove number 3
list         


        

Answer 1

var list = [1,2,3,4,5];
var numToRemove = 3;

var removeElementIndex = list.indexOf(numToRemove);
var afterRemoveElement = list[removeElementIndex+1];

list.slice(0, removeElementIndex).concat(afterRemoveElement).concat(numToRemove).concat(list.slice(removeElementIndex+2)) // [1,2,4,3,5]