Find K Closest Elements LeetCode solution in JavaScript

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var findClosestElements = function (arr, k, x) {
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  const result = [...arr];
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  while (result.length > k) {
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    const start = result[0];
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    const end = result.at(-1);
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    x - start <= end - x ? result.pop() : result.shift();
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  }
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  return result;
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};