JSFiddle - React, Tailwind, and code Playground

HTML

<div class="select">Hi there. These are inline styles</div>

CSS

.select {
    background-color:black;
    color:white;
}

JavaScript

(function ($) {
    $.extend($.fn, {
        makeCssInline: function () {
            this.each(function (idx, el) {
                var style = el.style;
                var properties = [];
                for (var property in style) {
                    if ($(this).css(property)) {
                        properties.push(property + ':' + $(this).css(property));
                    }
                }
                this.style.cssText = properties.join(';');
                $(this).children().makeCssInline();
            });
        }
    });
}(jQuery));

$('.select').makeCssInline();