Array.prototype.shift()

const array1 = [1, 2, 3];

const firstElement = array1.shift();

console.log(array1);
// Expected output: Array [2, 3]

console.log(firstElement);
// Expected output: 1

arr.shift();

var myFish = ["angel", "clown", "mandarin", "surgeon"];

console.log("myFish before: " + myFish);
// " myFish : angel,clown,mandarin,surgeon"

var shifted = myFish.shift();

console.log("myFish after: " + myFish);
// " myFish : clown,mandarin,surgeon"

console.log("Removed this element: " + shifted);
// "  : angel"

var names = ["Andrew", "Edward", "Paul", "Chris", "John"];

while ((i = names.shift()) !== undefined) {
  console.log(i);
}
// Andrew, Edward, Paul, Chris, John