Maximum Product Difference Between Two Pairs LeetCode solution in JavaScript

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var maxProductDifference = function (nums) {
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  nums.sort((a, b) => a - b);
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  return (
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    nums.slice(nums.length - 2).reduce((a, b) => a * b, 1) -
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    nums.slice(0, 2).reduce((a, b) => a * b, 1)
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  );
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};