JSFiddle - React, Tailwind, and code Playground

HTML

<div class=somediv>
    <div class="jn Gs">Linus Torvalds</div>
   <div class="jn Gs">I'm sexy and I know it</div>
   <div class="jn Ss">Lorem ipsum</div>


</div>

JavaScript

var action = function(e) {
    var content = e.innerText
    switch (content) {
    case "Linus Torvalds":
        elements[i].innerText = "The " + content;
        break;
    default:
        elements[i].innerText = content + " - who?";
    }
}


var elements = document.getElementsByClassName("jn")

for (var i = 0; i < elements.length; ++i) {
    if (~ (elements[i].className.indexOf('Gs'))) {
        action(elements[i])
    }
    var e = elements[i].getElementsByClassName('Gs')
    for (var j = 0; j < e.length; ++j) {
        action(e[j])
    }
}