Minimum Consecutive Cards to Pick Up LeetCode solution in JavaScript

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var minimumCardPickup = function (cards) {
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  let cardsSeen = {};
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  let minPicks = Infinity;
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  for (let i = 0; i < cards.length; i++) {
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    if (!(cards[i] in cardsSeen)) {
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      cardsSeen[cards[i]] = i;
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    } else {
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      const temp = i - cardsSeen[cards[i]] + 1;
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      minPicks = Math.min(minPicks, temp);
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      cardsSeen[cards[i]] = i;
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    }
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  }
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  return minPicks === Infinity ? -1 : minPicks;
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};