JSFiddle - React, Tailwind, and code Playground
HTML
<span class="dss"> lskdja;ldsjasldk </span>
<span class="dslkj"> lskdja;ldsjasldk </span>
<span class="sdlkjsdlkj"> lskdja;ldsjasldk </span>
<span class="sldkjlsdkj"> lskdja;ldsjasldk </span>
JavaScript
$('span').on('click', function(){
var classes = $(this).attr('class');
console.log(classes) //if there are more than one class do classes.split(' ')
})