Maximum Element After Decreasing and Rearranging LeetCode solution in JavaScript

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var maximumElementAfterDecrementingAndRearranging = function (arr) {
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  arr.sort((a, b) => a - b);
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  let maxVal = 1;
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  for (let i = 1; i < arr.length; i++) {
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    if (arr[i] > maxVal) {
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      maxVal += 1;
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    }
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  }
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  return maxVal;
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};