JSFiddle - React, Tailwind, and code Playground

HTML

<div class="life">
valor 0
</div>
<div class="life">
valor 1
</div>
<div class="life">
valor 2
</div>

JavaScript

eles = document.getElementsByClassName("life");
for(var i in eles) {
    document.getElementsByClassName("life")[i].innerText = "outro valor " +i;
}