how to hide all the scrollbar in css code example

Example 1: hgow to hide scroll bar and add buttons in javascript

<div class="container">
  <div class="row">
      <div class="col-12">
          <div class="scoll-pane mt-4" id="container">
              <ul class="photos">
                  <li>
                      <img src="https://robohash.org/test">
                  </li>
                  <li>
                      <img src="https://robohash.org/test">
                  </li>
                  <li>
                      <img src="https://robohash.org/test">
                  </li>
                  <li>
                      <img src="https://robohash.org/test">
                  </li>
              </ul>
          </div>
      </div>
  </div>
 </div>
<button id="slideBack" type="button">Prev</button>
<button id="slide" type="button">Next</button>
 
 
 <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css" integrity="sha384-ggOyR0iXCbMQv3Xipma34MD+dH/1fQ784/j6cY/iJTQUOhcWr7x9JvoRxT2MZw1T" crossorigin="anonymous">

Example 2: javascript hide scrollbar

function HideScrollbar() {
  var style = document.createElement("style");
  style.innerHTML = `body::-webkit-scrollbar {display: none;}`;
  document.head.appendChild(style);
}