<h1>Menu | Nav </h1>
 
  <nav id="navigation">
    <ul>
      <li><a href="#">najma</a>
      </li>
      <li><a href="#">najma</a>
      </li>
      <li><a href="#">najma</a>
      </li>
      <li><a href="#">najma</a>
      </li>
      <li><a href="#">najma</a>
      </li>
      <li><a href="#">najma</a>
      </li>
    </ul>
  </nav>
 

/* www.najmacode.com */

* {
  box-sizing: border-box;
}
/* Responsive Navigation styles begin here */

@media (max-width: 767px) {
  nav + * {
    position: relative;
  }
  /* Theming opened nav */
  
  nav ul {
    /* maximum height */
    
    max-height: 20em;
    overflow: visible;
    /* translate with hardware acceleration */
    
    transform: translateZ(0);
    -webkit-transition: max-height .4s;
    transition: max-height .4s, overflow .4s;
    will-change: max-height, overflow;
    /* global styles */
    
    margin: 0;
    padding: 0;
    list-style: none;
  }
  nav a {
    display: block;
    padding: 1.2rem;
    color: #333;
    background: #fff;
    text-decoration: none;
    margin-bottom: 2px;
  }
  nav a:hover,
  nav a:focus,
  nav a:active {
    background: #eee;
  }
  /* Theming closed nav */
  
  nav.is-closed ul {
    max-height: 0;
    overflow: hidden;
  }
  /* Global styling nav button */
  
  nav > button {
    position: absolute;
    top: .8rem;
    right: 1rem;
    z-index: 1;
    height: 4rem;
    width: 4rem;
    background-color: transparent;
    padding: 0;
    outline: 0;
    border: 1px solid #333;
    border-radius: 50%;
    cursor: pointer;
    -webkit-tap-highlight-color: rgba(0, 0, 0, 0);
    -webkit-transition: -webkit-transform .2s;
    transition: transform .2s;
  }
  /*  Removing Firefox's dotted outline on button */
  
  nav > button::-moz-focus-inner {
    border: 0;
  }
  nav > button::after,
  nav > button::before {
    content: "";
    position: absolute;
    top: 15%;
    right: 40%;
    bottom: 15%;
    left: 40%;
    background-color: #333;
    border-radius: 10px;
    -webkit-transition: -webkit-transform .2s;
    transition: transform .2s;
  }
  nav > button::before {
    top: 40%;
    right: 15%;
    bottom: 40%;
    left: 15%;
  }
  /* Theming opened nav button */
  
  nav:not(.is-closed) > button,
  nav:not(.is-closed) > button::before {
    -webkit-transform: rotate(90deg) translateZ(0);
    -ms-transform: rotate(90deg) translateZ(0);
    transform: rotate(90deg) translateZ(0);
  }
  /* Hide alternate text except from screen readers */
  
  .visually-hidden {
    position: absolute !important;
    clip: rect(1px, 1px, 1px, 1px);
    overflow: hidden;
    height: 1px;
    width: 1px;
  }
}
/* BONUS deco */
/* Global deco */

html {
  font-size: 62.5%;
}

body {
  margin: 0;
  padding: 1rem;
  background: #e3e3e3;
  color: #000;
  font-family: helvetica, arial, sans-serif;
  font-size: 1.3em;
  line-height: 1.5;
}

section {
  position: relative;
  margin-top: 1rem;
  ;
  padding: 1rem;
  background: #fff;
}

h1,
h2 {
  margin-top: 0;
  margin-bottom: 1rem;
  color: #345;
  text-shadow: 1px 1px 1px #fff;
}

h2 {
  margin-top: 2rem;
}

a {
  color: #345
}

ul {
  padding-left: 1em;
  list-style-position: inside
}

section li {
  list-style: none;
}

section li::before {
  content: "\2713 ";
  margin-right: .8rem;
}
/* orientation */

@media (orientation: landscape) and (max-device-width: 767px) {
  html, body {
    -webkit-text-size-adjust: 100%;
  }
}

     var maxBreakpoint = 767;  
    var targetID = 'navigation'; 

     var n = document.getElementById(targetID);

     n.classList.add('is-closed');

     function navi() {
       if (window.matchMedia("(max-width:" + maxBreakpoint + "px)").matches && document.getElementById("toggle-button") == undefined) {
        n.insertAdjacentHTML('afterBegin', '<button id="toggle-button" aria-label="open/close navigation"></button>');
        t = document.getElementById("toggle-button");
        t.onclick = function() {
          n.classList.toggle('is-closed');
        }
      }
       var minBreakpoint = maxBreakpoint + 1;
      if (window.matchMedia("(min-width: " + minBreakpoint + "px)").matches && document.getElementById("toggle-button")) {
        document.getElementById("toggle-button").outerHTML = "";
      }
    }
    navi();
     window.addEventListener('resize', navi);