JSFiddle - React, Tailwind, and code Playground

by Laurie

HTML

<button type="button" role="button" aria-label="Toggle Navigation" id="mbtn" class="lines-button x">
          <span class="lines"></span>
        </button>

CSS

html, body {
  height: 100%;
}

body {
  background-color: white;
  font-family: "Source Sans pro", sans-serif;
}

#mbtn {
  display: inline-block;
  margin: 0 1em;
  border: none;
  background: none;
}
#mbtn span {
  display: block;
}

.lines-button {
  padding: 2rem 1rem;
  transition: .3s;
  cursor: pointer;
  /* */
}

.lines {
  display: inline-block;
  width: 4rem;
  height: 0.57143rem;
  background: #211f20;
  border-radius: 0.28571rem;
  transition: 0.3s;
  position: relative;
}
.lines:before, .lines:after {
  display: inline-block;
  width: 4rem;
  height: 0.57143rem;
  background: #211f20;
  border-radius: 0.28571rem;
  transition: 0.3s;
  position: absolute;
  left: 0;
  content: '';
  -webkit-transform-origin: 0.28571rem center;
  transform-origin: 0.28571rem center;
}
.lines:before {
  top: 1rem;
}
.lines:after {
  top: -1rem;
}

.lines-button:hover .lines:before {
  top: 1.14286rem;
}
.lines-button:hover .lines:after {
  top: -1.14286rem;
}

.lines-button.close {
  -webkit-transform: scale3d(0.8, 0.8, 0.8);
  transform: scale3d(0.8, 0.8, 0.8);
}

.lines-button.x.close .lines {
  background: transparent;
}
.lines-button.x.close .lines:before, .lines-button.x.close .lines:after {
  -webkit-transform-origin: 50% 50%;
  transform-origin: 50% 50%;
  top: 0;
  width: 4rem;
}
.lines-button.x.close .lines:before {
  -webkit-transform: rotate3d(0, 0, 1, 45deg);
  transform: rotate3d(0, 0, 1, 45deg);
}
.lines-button.x.close .lines:after {
  -webkit-transform: rotate3d(0, 0, 1, -45deg);
  transform: rotate3d(0, 0, 1, -45deg);
}

JavaScript

var anchor = document.querySelectorAll('button');
    
    [].forEach.call(anchor, function(anchor){
      var open = false;
      anchor.onclick = function(event){
        event.preventDefault();
        if(!open){
          this.classList.add('close');
          open = true;
        }
        else{
          this.classList.remove('close');
          open = false;
        }
      }
    });