I want to run this javascript function or eventlisnter until the script attribute in the dom is not type="myscript" and it needs to keep checking it.

function myFunction() {
   var element = document.getElementById("myDIV");
   element.classList.toggle("mystyle");
}

document.querySelector("button").addEventListener("click", myFunction);

the eventlisnter or should should stopped working if the all the script type="myscript" value is changed to type="text/javascript" by other javascript

<script type="myscript" src="/mbundle.min.js"></script>
<script type="myscript" src="/ebundle.min.js"></script>
<script type="myscript" src="/cbundle.min.js"></script>