Answers for "delete array element if we have an index in js"

javascript remove from array by index

//Remove specific value by index
array.splice(index, 1);

js remove element from array

const array = [2, 5, 9];

console.log(array);

const index = array.indexOf(5);
if (index > -1) {
  array.splice(index, 1);
}
// array = [2, 9]
console.log(array);