TypedArray.prototype.entries()

const uint8 = new Uint8Array([10, 20, 30, 40, 50]);
const eArr = uint8.entries();

eArr.next();
eArr.next();

console.log(eArr.next().value);
// : Array [2, 30]

entries()

const array = new Uint8Array([10, 20, 30, 40, 50]);
const arrayEntries = arr.entries();
for (const element of arrayEntries) {
  console.log(element);
}

const array = new Uint8Array([10, 20, 30, 40, 50]);
const arrayEntries = arr.entries();

console.log(arrayEntries.next().value); // [0, 10]
console.log(arrayEntries.next().value); // [1, 20]
console.log(arrayEntries.next().value); // [2, 30]
console.log(arrayEntries.next().value); // [3, 40]
console.log(arrayEntries.next().value); // [4, 50]