<!-- Any copyright is dedicated to the Public Domain.
     http://creativecommons.org/publicdomain/zero/1.0/ -->
<!doctype html>
<html>
  <head>
    <meta charset="utf-8"/>
    <title>Debugger test page</title>
  </head>

  <body>
    <button>Click me!</button>
    <input type="text" onchange="changeHandler()">

    <script type="text/javascript">
      "use strict";

      window.addEventListener("load", function() {
        function initialSetup(event) {
          // eslint-disable-next-line no-debugger
          debugger;
          const button = document.querySelector("button");
          button.onclick = clickHandler;
        }
        function clickHandler(event) {
          window.foobar = "clickHandler";
        }
        function changeHandler(event) {
          window.foobar = "changeHandler";
        }
        function keyupHandler(event) {
          window.foobar = "keyupHandler";
        }

        const button = document.querySelector("button");
        button.onclick = initialSetup;

        const input = document.querySelector("input");
        input.addEventListener("keyup", keyupHandler, true);

        window.changeHandler = changeHandler;
      }, {once: true});
    </script>
  </body>

</html>
