Invalid Transactions LeetCode solution in JavaScript

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var invalidTransactions = function (transactions) {
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  const invalid = new Uint8Array(transactions.length).fill(false);
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  for (let i = 0; i < transactions.length; i++) {
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    const [name, time, amount, city] = transactions[i].split(",");
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    if (+amount > 1000) invalid[i] = true;
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    for (let j = i + 1; j < transactions.length; j++) {
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      const [name1, time1, amount1, city1] = transactions[j].split(",");
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      if (Math.abs(+time - +time1) <= 60 && name === name1 && city !== city1) {
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        invalid[i] = true;
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        invalid[j] = true;
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      }
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    }
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  }
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  return invalid.reduce((acc, val, index) => {
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    if (val) acc.push(transactions[index]);
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    return acc;
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  }, []);
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};