html sub class attribute code example
Example 1: how to write 2 class in html
<div class="nav nav-centered nav-reversed navbar navigation-block"></div>
Example 2: html create class
<h1 class="write a name">H1 content</h1>
<div class="nav nav-centered nav-reversed navbar navigation-block"></div>
<h1 class="write a name">H1 content</h1>