Untitled

<!DOCTYPE html>
<html>
<head>
  <meta charset="UTF-8">
  <title>Parameters</title>
  <style>
    body {
      display: flex;
      flex-direction: column;
      font-family: monospace;
    }
    div, textarea {
      border: 1px solid #333;
      flex: 1;
      font: inherit;
      margin: 8px;
      padding: 8px;
      overflow-wrap: break-word;
    }
  </style>
</head>
<body>
  <h1>Parameters</h1>
  <textarea onkeyup="parse()"></textarea>
  <div></div>
  <script>
    function parse() {
      document.querySelector('div').innerText = document.querySelector('textarea').value
        .split('&')
        .filter(x => !x.endsWith('active=0'))
        .map(x => (/.*:(.*=.+)/).exec(x))
        .filter(x => x)
        .map(x => x[1])
        .filter(x => (/^[^:]+$/).test(x))
        .join('\n');
    }
  </script>
</body>
</html>