javascript remove active class code example

Example 1: first remove active class from classlist and append to current element using javascript

function myFunction(e) {
  if (document.querySelector('#navList a.active') !== null) {
    document.querySelector('#navList a.active').classList.remove('active');
  }
  e.target.className = "active";
}

Example 2: remove active class from all li javascript

<!-- w3.js brings the simple and fast solution -->
<script src="https://www.w3schools.com/lib/w3.js"></script>
<ul>
  <li class="ready">
</li>
  <li class="ready">
</li>
  <li class="ready">
</li>
</ul>
<button onclick="w3.removeClass('li','ready');"></button>