test.html

<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="utf-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
  <meta name="viewport" content="width=device-width">

  <title>test</title>
</head>

<body>
  <input type="number" id="input">
  <input type="text" id="result">
  <button id="btnRequest">请求</button>
  <button id="btnClear">清空</button>
  <button onclick="f()">跳转</button>

  <script src="main.js"></script>
  <script src="worker.js"></script>
  <script>
    Observer[1] = function (msg) {
      result.value = JSON.stringify(msg)
    }
    Observer[2] = function (msg) {
      result.value = JSON.stringify(msg)
    }

    btnRequest.onclick = function () {
      if (1 != input.value && 2 != input.value) {
        input.value = 1
      }
      Request(input.value)
    }

    btnClear.onclick = function () {
      result.value = ''
    }

    function f() {
      location.href = './test2.html';
    }
  </script>
</body>

</html>