Combination Sum IV LeetCode solution in JavaScript

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var combinationSum4 = function (nums, target) {
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  const dp = Array(target + 1).fill(0);
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  nums.sort((a, b) => a - b);
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  for (let k = 1; k <= target; k++) {
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    for (let n of nums) {
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      if (k < n) break;
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      dp[k] += k == n ? 1 : dp[k - n];
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    }
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  }
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  return dp[target];
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};