Removing elements from JavaScript arrays

Question

I have the following array setup, i,e:

var myArray = new Array();

Using this array, I am creating a breadcrumb menu dynamically as the user add

Answer 1

Remove array element by position/element(Actual array modifies)

1 - arr.splice(1, 1) -----> (index, no of elements)

2 - arr.splice(arr.indexOf(5), 1) -----> (array.indexOf(InputValue), no of elements)

let arr = [1,2,3,4,5];
console.log(arr.splice(1,1));                // [2]
console.log(arr.splice(arr.indexOf(5), 1));  // [5]
console.log(arr);                            // [1, 3, 4]

Remove array element by position/element(creates copy array)

let arr2 = [10, 20, 30, 40]
let result = arr2.filter(a=> a!==20);
let result2 = arr2.filter(a=> a!==arr2[arr2.indexOf(30)])
console.log(result)    // [10, 30, 40]
console.log(result2)   // [10, 20, 40]