Minimum Absolute Difference LeetCode solution in JavaScript

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var minimumAbsDifference = function (arr) {
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  arr.sort((a, b) => a - b);
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  let minDif = Infinity;
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  let res = [];
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  for (let i = 0; i < arr.length - 1; i++) {
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    let currDif = Math.abs(arr[i + 1] - arr[i]);
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    if (currDif < minDif) minDif = currDif;
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  }
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  for (let i = 0; i < arr.length - 1; i++) {
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    let dif = Math.abs(arr[i + 1] - arr[i]);
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    if (dif === minDif) {
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      res.push([arr[i], arr[i + 1]]);
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    }
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  }
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  return res;
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};