JSFiddle - React, Tailwind, and code Playground

by kangismet

HTML

<div class='post-body'>
    <img alt='test' src='http://4.bp.blogspot.com/-njQDGs_YlNc/UmjHpciPYWI/AAAAAAAAF6k/6s64x4q-pGw/s1600/kangis-logo-new.png'/>
</div>

CSS

.post-body img {
    margin:20px;
    background:yellow;
    padding:20px;
}

JavaScript

var elems = document.getElementsByTagName('img');
for(var i = 0; i < elems.length; i++) {
    elems[i].style.background = 'green';
}