<div id="menu-btn" onClick="showMenu(true)">MENU<i class="fa fa-bars"></i></div>
<h1>Sliding Menu</h1>
<div id="menu__panel">
  <i id="menu__close" class="menu__close fa fa-angle-left fa-2x" onClick="showMenu(false)"></i>
  <ul class="menu">
    <li class="menu-item"><a href="#home"><i class="fa fa-home fa-2x"></i>HOME</a></li>
    <li class="menu-item"><a href="#team"><i class="fa fa-users fa-2x"></i>TEAM</a></li>
    <li class="menu-item"><a href="#products"><i class="fa fa-cubes fa-2x"></i>PRODUCTS</a></li>
    <li class="menu-item"><a href="#pricing"><i class="fa fa-shopping-cart fa-2x"></i>PRICING</a></li>
    <li class="menu-item"><a href="#contact"><i class="fa fa-envelope fa-2x"></i>CONTACT</a></li>
  </ul>
</div>
// -----------------------------------------
$color1: #152A38;
$color2: #29435C;
@import url(https://fonts.googleapis.com/css?family=Open+Sans|Oleo+Script);
// -----------------------------------------
div {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 0;
  display: flex;
  justify-content: center;
  align-items: center;
  width: 100%;
  height: 100vh;
  background-color: #2c3e50;
  font-family: 'Open Sans', sans-serif;
  color: #fff;
}

h1 {
  padding: 0 20px;
  font-family: 'Oleo Script', sans-serif;
  font-size: 4em;
  border-top: 5px solid;
  border-bottom: 5px solid;
}

a {
  text-decoration: none;
  color: inherit;
}

.fadeInDown {
  opacity: 1 !important;
  transform: translateY(40px) !important;
}

#menu-btn {
  position: absolute;
  top: 50px;
  right: 20px;
  padding: 10px 20px;
  border: 1px solid transparent;
  /* To avoid icon movement on hover */
  font-weight: 300;
  user-select: none;
  transition: border-color 0.3s;
  transform: translateY(-50%);
  i {
    margin-left: 10px;
  }
  &:hover {
    cursor: pointer;
    border-color: #fff;
  }
}

#menu__panel {
  position: fixed;
  top: 0;
  bottom: 0;
  right: 0;
  width: 300px;
  z-index: 9999;
  background-color: $color1;
  box-shadow: -2px 2px 20px rgba(#000, 0.5);
  user-select: none;
  transform: translateX(300px);
  transition: transform 0.5s;
}

.menu {
  position: absolute;
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  align-content: center;
  top: 40px;
  bottom: 0;
  left: 0;
  width: 100%;
  margin: 0;
  padding: 0;
  list-style: none;
}

.menu-item {
  width: 100%;
  height: 60px;
  opacity: 0;
  transform: translateY(0);
  transition: all 0.3s;
  &:hover {
    background-color: $color2;
  }
  i {
    margin: 0 10px;
  }
  a {
    display: inline-block;
    width: 100%;
    height: 70px;
    padding-left: 50px;
    line-height: 70px;
  }
}

.menu__close {
  position: absolute;
  top: 10px;
  left: 10px;
  padding: 5px 10px;
  transition: transform 0.5s;
  &:hover {
    cursor: pointer;
  }
}
View Compiled
function showMenu(menu) {

  var angle = '0deg',
    slide = '300px';

  if (menu) {
    angle = '180deg';
    slide = '0';
  }

  // Slide panel
  $("#menu__panel").css({
    transform: "translateX(" + slide + ")"
  });

  // Rotate icon
  setTimeout(function() {
    $("#menu__close").css({
      transform: "rotate(" + angle + ")"
    });
  }, 300);

  // Animate menu items
  $(".menu-item").each(function(i) {
    var row = $(this);
    setTimeout(function() {
      menu && row.addClass('fadeInDown');
      !menu && row.removeClass('fadeInDown');
    }, 100 * i);
  });

}

External CSS

  1. https://maxcdn.bootstrapcdn.com/font-awesome/4.5.0/css/font-awesome.min.css
  2. https://cdnjs.cloudflare.com/ajax/libs/animate.css/3.5.1/animate.min.css

External JavaScript

  1. https://code.jquery.com/jquery-2.2.4.min.js