JSFiddle - React, Tailwind, and code Playground

HTML

<button id="tray-toggle" aria-controls="nav-tray" tabindex="0">Menu</button>
<div id="nav-tray">
        <ul id="nav-main-menu">
        <li><a href="#">One</a></li>
        <li><a href="#">Two</a></li>
    </ul>
    </div>
<header role="banner">
        <p>header</p>
    </header>
<div id="wrapper">
        <main>
        <p>Content</p>
    </main>
        <footer>
        <p>Footer</p>
    </footer>
    </div>

CSS

body{
    width: 100%;
    overflow-x: hidden;
    padding-top: 60px;
}
body.tray-open {
    overflow: hidden;
}
#wrapper {
    position: relative;
    left: 0;
    -webkit-transition: left 1s;
    transition: left 1s;
}
header {
    position: fixed;
    top: 0;
    left: 0;
    z-index: 1;
    width: 100%;
    height: 60px;
    -webkit-transition: left 1s;
    transition: left 1s;
}
#tray-toggle {
    position: absolute;
    top: 10px;
    right: 60px;
    z-index: 10;
}
#nav-tray {
    position: fixed;
    top: 2px;
    left: -200px;
    bottom: -60px;
    z-index: 2;
    overflow: scroll;
    width: 200px;
    -webkit-transition: left 1s;
    transition: left 1s;
}
.tray-open #nav-tray {
    left: 0;
}
.tray-open #wrapper {
    left: 200px;
}
.tray-open header {
    left: 200px;
}

JavaScript

$(function() {
    $('#tray-toggle').click(function(){$('body').toggleClass('tray-open')});
});