JSFiddle - React, Tailwind, and code Playground

HTML

<div class="container">
    <div id="page-above" class="content">
        <h2>Some Content above sticky</h2>
        Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam erat, sed diam voluptua. At vero eos et accusam et justo duo dolores et ea rebum. Stet clita kasd gubergren, no sea takimata sanctus est Lorem ipsum dolor sit amet. Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam erat, sed diam voluptua. At vero eos et accusam et justo duo dolores et ea rebum. Stet clita kasd gubergren, no sea takimata sanctus est Lorem ipsum dolor sit amet.</div>
  <div id="sticky">This is sticky</div>
  <div id="page-content" class="content">
      <h2>Some Random Page Content</h2>
      Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam erat, sed diam voluptua. At vero eos et accusam et justo duo dolores et ea rebum. Stet clita kasd gubergren, no sea takimata sanctus est Lorem ipsum dolor sit amet. Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam erat, sed diam voluptua. At vero eos et accusam et justo duo dolores et ea rebum. Stet clita kasd gubergren, no sea takimata sanctus est Lorem ipsum dolor sit amet. Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam erat, sed diam voluptua. At vero eos et accusam et justo duo dolores et ea rebum. Stet clita kasd gubergren, no sea takimata sanctus est Lorem ipsum dolor sit amet. 

Duis autem vel eum iriure dolor in hendrerit in vulputate velit esse molestie consequat, vel illum dolore eu feugiat nulla facilisis at vero eros et accumsan et iusto odio dignissim qui blandit praesent luptatum zzril delenit augue duis dolore te feugait nulla...

CSS

body {
  margin: 0
}
#sticky {
  padding: 1em;
  background: black;
  color: white;
  width: 100%
}

#sticky.fixed {
  position: fixed;
  top: 0;
  left: 0;
}

.content {
  padding: 1em
}

JavaScript

/* Initialize sticky outside the event listener as a cached selector.
 * Also, initialize any needed variables outside the listener for 
 * performance reasons - no variable instantiation is happening inside the listener.
*/
var sticky = $('#sticky'),
    stickyTop = sticky.offset().top,
    scrolled = false,
    $window = $(window);

/* Bind the scroll Event */
$window.on('scroll', function(e) {
    scrolled = true;
});

var timeout = setInterval(function() {
    /* If the page was scrolled, handle the scroll */
    if (scrolled) {
        scrolled = false;
        if ($window.scrollTop() >= stickyTop) {
            sticky.addClass('fixed');
        } else {
            sticky.removeClass('fixed');
        }
    }
}, 100);