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<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>Parse TSV</title>
</head>
<body>
  <h1>Multi-line TSV</h1>
  <pre id="out"></pre>
  <script>
    var tsv = "name\tscore\nAlice\t95\nBob\t88";
    var rows = tsv.split(/\n/).map(function (line) {
      return line.split(/\t/);
    });
    document.getElementById("out").textContent = JSON.stringify(rows);
  </script>
</body>
</html>

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JavaScript RegExp \t — parse TSV file (Try It)