I strip my app till I isolate the problem. I have a simple page with a script file. If I open the file in browser, everything is OK. But, (with file opened in browser) if I press CTRL and click Back/Forward/Refresh, then Firefox will open a new file. The problem is that in console log will appear the message "Hmmm...". Somehow Firefox will trigger inputevent on textarea on new window. Firefox version is 93.0 (64). Chrome is OK.
index.html
<!doctype html>
<html>
<head>
<script src="https://code.jquery.com/jquery-1.12.4.min.js" integrity="sha256-ZosEbRLbNQzLpnKIkEdrPv7lOy9C27hHQ+Xp8a4MxAQ=" crossorigin="anonymous"></script>
<script defer src="myscript.js" type="text/javascript"></script>
</head>
<body>
<textarea id="mytext"></textarea>
</body>
</html>
myscript.js
$('#mytext').on('input', function (){
console.log("Hmmm...");
});
Where is the problem? Why Firefox is triggering inputevent on textarea on new window?
PS A simple fix is to drop the defer attribute, but, in the original app I want to load this file at the end. Something is wrong but i do not understand what is wrong.