JSFiddle - React, Tailwind, and code Playground
HTML
<span class="fixed">I am a position:fixed span<span>
CSS
.fixed {
position: fixed;
background-color: hsl(0, 90%, 90%);
}
JavaScript
(function () {
var elementList = document.getElementsByClassName('fixed')
,element = elementList[0]
,style
;
style = window.getComputedStyle(element);
alert(style.display);
})();