Using JavaScript, how can I increment all items in an array and return the array?

There is one function that I am stuck on with incrementing all of the items in my array and returning the array. What to do now?

function incrementByOne(arr) {
  // arr is an array of integers(numbers), Increment all items in the array by
  // return the array
  for (let i = 0; i < arr.length; i++) {
    arr[i] += 1;
    return(arr);
  }
 
}

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