JSFiddle - React, Tailwind, and code Playground

HTML

<p id="p">An example element</p>

JavaScript

window.onload = function () {
	var p = document.getElementById('p'),
		dispValue = ['-webkit-box', '-moz-box', '-ms-flexbox', '-webkit-flex', 'flex'],
		n;
		
	for (n = 0; n < dispValue.length; n++) {
		p.style.display = dispValue[n];
		if (window.getComputedStyle(p, null).display === dispValue[n]) {
			break;
		}
	}
	alert(p.style.display);
}