JSFiddle - React, Tailwind, and code Playground

HTML

<div class="content">one,two,three</div>
<div class="content">four,five,six</div>
<div class="content">seven,eight,nine</div>

JavaScript

$('.content').each(function() {

    var mydata = $(this).text().split(', ').join(", ");
    $(this).text(mydata);

});