how to remove a scroll bar in html code example

Example 1: how to eliminate scroll bar in html

html { overflow-y: hidden; }

Example 2: 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 3: how to make scrollbar hidden

overflow: hidden;