revision:
The with() method of Array instances is the copying version of using the bracket notation to change the value of a given index. It returns a new array with the element at the given index replaced with the given value.
array.with(index, value)
Parameters:
index : Zero-based index at which to change the array, converted to an integer. Negative index counts back from the end of the array — if "index < 0", "index + array.length" is used. If the index after normalization is out of bounds, a "RangeError" is thrown.
value : any value to be assigned to the given index.
<div>
<p id="with-1"></p>
<p id="with-2"></p>
<p id="with-3"></p>
</div>
<script>
const arr = [1, 2, 3, 4, 5];
document.getElementById('with-1').innerHTML = "array : " + arr;
console.log(arr.with(2, 6)); // [1, 2, 6, 4, 5]
document.getElementById('with-2').innerHTML = "array.with : " + arr.with(2, 6);
console.log(arr); // [1, 2, 3, 4, 5]
document.getElementById('with-3').innerHTML = "array : " + arr;
</script>