MCW

I am pretty new to this, or several years removed being more like it.  I replaced toggle with contains.  How else would I change this.  Thanks!

<script>
var coll = document.getElementsByClassName("collapsible");
var i;

for (i = 0; i < coll.length; i++) {
  coll.addEventListener("click", function() {
    this.classList.contains("active");
    var content = this.nextElementSibling;
    if (content.style.display === "block") {
      content.style.display = "none";
    } else {
      content.style.display = "block";
    }
  });
}
</script>

https://www.w3schools.com/howto/howto_js_collapsible.asp

Whenever I use the code modified or direct into an html, it works in Edge, Chrome and Firefox and not in IE.  Any idea what would cause this?

Thanks!