JSFiddle - React, Tailwind, and code Playground

by Prathameshsb

HTML

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>

<div class="divParent">
  <div class="divSecond">
    <header class='isHeader'>
      <div class="headingEle">
        <h1 style="">
        Hello World!
        </h1>
      </div>
      <nav class="navbar"> <!-- class='isSticky' -->
        A nav bar here!
      </nav>
    </header>

    <h2>
    New element outside the header which has the sticky element
    </h2>

    <main style="height: 1000px;">
      Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.

      Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.

      Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.
    </main>
  </div>
</div>

CSS

body { margin: 0px; padding: 0px; }

.isHeader {
  display: flex;
  width: 100%;
}

.headingEle {
  width:100%;
  background-color: blue;
}

.navbar {
    width: 100%;
    height: 100%;
    background-color: red;
}

.fixed-header {
    position: fixed;
    top: 0;
    right: 0;
    z-index: 10;
    width: 50%;
}

/* 
.isSticky {
  position: sticky;
  top: 0;
} */

JavaScript

function init() {

  let stickyNavTop = document.querySelector(".navbar");
  let stickyNavTopOffset = stickyNavTop.offsetTop;
  
  let isHeader = document.querySelector('.isHeader').offsetHeight;
  
  window.addEventListener('scroll', () => {
    if(document.documentElement.scrollTop >= stickyNavTopOffset) {
      stickyNavTop.classList.add('fixed-header');
    } else {
      stickyNavTop.classList.remove('fixed-header');
    }
  });
  

}

document.addEventListener('onload', init());