JSFiddle - React, Tailwind, and code Playground

by Alexandru Gatea

HTML

<div id="main-container">
  <div id="navBtn"></div>
  <div id="container">
    <div id="navMenu"></div>
  </div>
</div>

CSS

#main-container {
  width: 350px;
  height: 600px;
  border: 1px solid black;
  position: absolute;
  overflow: hidden;
}

#container {
  width: 350px;
  height: 100%;
  display: absolute;
  z-index: 1;
  background: rgba(0, 102, 199, 0.8);
}

#navBtn {
  width: 50px;
  height: 50px;
  background: red;
  position: absolute;
  z-index: 999;
}

#navMenu {
  width: 250px;
  height: 100%;
  background: blue;
  position: absolute;
  z-index: 9999;
  top: 0;
  animation-name: slidein;
  animation-duration: .5s;
}

@-webkit-keyframes slidein {
  0% {
    transform: translateX(-200px);
  }
  100% {
    transform: translateX(0px);
  }
}

#navMenu.close {
  animation-name: slideout;
  animation-duration: .5s;
}

@-webkit-keyframes slideout {
  0% {
    transform: translateX(0px);
  }
  100% {
    transform: translateX(-200px);
  }
}

JavaScript

var navBtn = document.getElementById("navBtn");
var navMenu = document.getElementById("navMenu");
var container = document.getElementById("container");
navBtn.addEventListener("click", showMenu);
container.addEventListener("click", hideMenu);

navMenu.style.display = "none";

function showMenu() {
  if (navMenu.style.display !== "none") {
    navMenu.style.display = "none"
  } else {
    navMenu.style.display = "block", container.style.background = "rgba(0, 102, 199, 1)";
  }
}

function hideMenu() {
  if (navMenu.style.display = "block") {
    navMenu.style.display = "none", container.style.background = "lightblue";
  }
}