Minimum Difference Between Highest and Lowest of K Scores LeetCode solution in JavaScript

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/**
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 * @param {number[]} nums
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 * @param {number} k
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 * @return {number}
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 */
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var minimumDifference = function (nums, k) {
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  nums.sort((a, b) => a - b);
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  let min = nums[0],
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    max = nums[k - 1],
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    diff = max - min;
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  for (let i = k; i < nums.length; i++) {
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    diff = Math.min(diff, nums[i] - nums[i - k + 1]);
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  }
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  return diff;
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};