JSFiddle - React, Tailwind, and code Playground

by Sean Wessell

HTML

<p> <span class="fox">span</span>

</p>

CSS

.fox {
    background:red;
}
.orange{
    background:orange;
}

JavaScript

var a = document.getElementsByTagName('p');
    [].slice.call(a).forEach(val => {
        alert(val.innerHTML);
        val.innerHTML = val.innerHTML.replace(/fox/,'<span class="orange">fox</span>');
        alert(val.innerHTML);
    })