Unable to avoid mousewheel scrolling the whole page when capturing the mousewheel in youtube (Javascript)

I’m trying to get a simple Chrome plugin to skip forward and backwards in youtube when the mousewheel is scrolled vertically.
That is working fine, but unfortunately the page also scrolls up and down when I use the mousehweel. I am trying to cancel the propagation of the mousewheel event with no success.

I have tried to no avail:

e.preventDefault();

return false;

e.stopImmediatePropagation();

Here is the code, as you can see I’ve tried many things.
There are only two JS files:

const playerdata = {
  "www.youtube.com" : {
    "keyCodes" : [39, 37],
    //"keyCodes" : [76, 74],
    "elem" : document
  }
}


var curPlayer = playerdata[location.host]

function triggerKeydown(forward) {
    //try {
          var elem;
          var e = new Event('keydown');
          
          e.keyCode = forward ? curPlayer.keyCodes[0] : curPlayer.keyCodes[1];
          if (typeof curPlayer.elem == "string") {
            elem = document.querySelector(curPlayer.elem)
          } else {
            elem = curPlayer.elem
          }
          //$(window).scrollTop(); // error on $
          
            
          e.preventDefault();
          elem.dispatchEvent(e);
          //e.preventDefault();
          //e.stopImmediatePropagation();
    //} catch(ex) {
        //alert(ex); // no error
    //}
    //e.preventDefault();
    //e.stopImmediatePropagation();
    //return false;
    
}

document.addEventListener("wheel", function(e) {
    //e.preventDefault();
  if (e.deltaX == 0 && e.deltaZ == 0) {
    if (e.deltaY > 0) {
      //e.preventDefault();
      triggerKeydown(false);
    } else if (e.deltaY < 0) {
      //e.preventDefault();
      triggerKeydown(true);
      
    }
  }
});

function injectScript(file_path, tag) {
    var node = document.getElementsByTagName(tag)[0];
    var script = document.createElement('script');
    script.setAttribute('type', 'text/javascript');
    script.setAttribute('src', file_path);
    node.appendChild(script);
}

injectScript(chrome.extension.getURL('video-seek-mousewheel.js'), 'body');