JSFiddle - React, Tailwind, and code Playground

HTML

<a class="one a" href="">link 1</a>
<a class="one b" href="">link 2</a>
<a class="one c" href="">link 3</a>


<a class="one d" href="">link 4</a>
<a class="one e" href="">link 5</a>

CSS

a { display:block;}

.d,.e { display:none; }

JavaScript

$('.one:visible').css('background-color','yellow'); //works
alert($('.one:visible').length);