JSFiddle - React, Tailwind, and code Playground

by David Thomas

HTML

<p>Some content in a 'p' within the 'body'.</p>

CSS

body {
    color: #000;
}

div {
    color: #f90;
}

JavaScript

var sheets = document.styleSheets[2].rules,
    classString = 'body',
    propsTo = {
        'color': '#0f0'
    };

for (var i = 0, len = sheets.length; i < len; i++) {
    if (sheets[i].selectorText == classString) {
        for (var prop in propsTo) {
            if (propsTo.hasOwnProperty(prop)) {
                sheets[i].style[prop] = propsTo[prop];
            }
        }
    }
}