docshell/test/mochitest/file_bug1850335_1.html

   1 <script>
   2 addEventListener("load", ({ persisted }) => {
   3   document.getElementById("input1").value = "";
   4 });
   5 addEventListener("pageshow", ({ persisted }) => {
   6   let bc = new BroadcastChannel("bug1850335");
   7
   8   bc.addEventListener("message", ({ data: { cmd, arg } }) => {
   9     if (cmd == "setValue") {
  10       document.getElementById("input1").value = arg;
  11       bc.postMessage({ value: document.getElementById("input1").value });
  12     } else if (cmd == "load") {
  13       bc.close();
  14       location = arg;
  15     } else if (cmd == "close") {
  16       close();
  17     }
  18   });
  19
  20   bc.postMessage({ persisted, value: document.getElementById("input1").value });
  21 });
  22 </script>
  23 <input type="text" id="input1"></input>