jQuery addClass example

Change class name on click in jQuery

HTML

<div class="nav-link">Click me</div>
<div class="sidebar">Hello World</div>

CSS

.nav-link {
  padding: 20px;
  background: green;
  display: inline-block;
}

.sidebar {
  display: none;
}

.sidebar.show {
  display: block;
}

JavaScript

$('.nav-link').on('click', () => {
	$('.sidebar').toggle('show');
})