Longest Consecutive Sequence LeetCode solution in JavaScript

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/**
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 * @param {number[]} nums
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 * @return {number}
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 */
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var longestConsecutive = function (nums) {
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  if (nums.length === 1) {
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    return 1;
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  }
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  if (nums.length === 0) {
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    return 0;
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  }
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  nums.sort((a, b) => a - b);
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  let result = 1;
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  let streak = 1;
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  let i = 0;
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  while (i < nums.length - 1) {
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    if (nums[i] == nums[i + 1]) {
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      i++;
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      continue;
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    }
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    if (nums[i] == nums[i + 1] - 1) {
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      streak++;
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      if (streak > result) {
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        result = streak;
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      }
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    } else {
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      streak = 1;
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    }
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    i++;
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  }
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  return result;
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};