TypedArray.prototype.entries()

entries();

const array = new Uint8Array([10, 20, 30, 40, 50]);
const arrayEntries = arr.entries();
// your browser must support for..of loop
// and let-scoped variables in for loops
for (let 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]