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HTML

            
              <div class="container">
  <a id="button">Show lateral container</a>
</div>
<div class="lateral-container">
  <a id="close">X close</a>
  <div class="lateral-container__content">
    <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Dolorum voluptate quisquam impedit iste nemo at quod velit ratione laudantium molestiae itaque ut alias eligendi sed quis, rerum praesentium molestias odio minima amet, eaque, debitis libero accusamus facere aspernatur! Aliquid, sit. Perspiciatis corporis odio suscipit quas ullam aspernatur a quis itaque nemo officia tenetur totam, sint nulla magnam ipsum, cumque sit nobis porro, eum quisquam. Officia ipsam hic repellendus enim magnam, dolores quia sint, beatae minus odit eius laudantium obcaecati veniam quibusdam cupiditate quis ullam suscipit architecto doloremque consequatur error deserunt reiciendis consectetur, excepturi? Reprehenderit eveniet perspiciatis sit voluptatem adipisci alias ea quidem accusamus tenetur aperiam fuga quod modi, ut nisi dolore repellendus dicta quasi repellat. Perferendis aspernatur eum soluta harum, officiis iusto? Ab sed, quidem pariatur repellat distinctio tempore, quae nulla praesentium sunt esse dolor, mollitia architecto nihil debitis vel. Corporis ex asperiores nam aperiam ab, impedit excepturi ullam! Perferendis totam excepturi consectetur, qui quasi libero dolore neque laborum recusandae doloremque repudiandae vel placeat eaque dolores. Magnam laboriosam maiores quam fuga quae, dolore maxime, vitae, voluptatem distinctio quasi aperiam iste porro commodi facilis ea nesciunt ex aliquid enim natus. Illo a accusamus, omnis, cumque assumenda eaque veniam voluptates nisi adipisci sint expedita aspernatur non sapiente laborum minus possimus! Voluptatum quae molestias, doloremque accusamus et magni laudantium voluptate consectetur, aut libero.</p>
  </div>
</div>
!

CSS

            
              body{
  font-family: verdana;
  &.show-lateral{
    overflow: hidden;
  }
}

.container{
  position: relative;
  background-color: #eee;
  max-width: 1000px;
  min-height: 700px;
  margin: 0 auto;
  padding: 1em;
  text-align: center;
  transition: .1s;
  
  .show-lateral &{
    transform: translateX(-20%);
    transition: .3s;
    opacity: .1;
  }
}

.lateral-container{
  position: fixed;
  top: 0;
  right: 0;
  transform: translateX(400px);
  bottom: 0;
  width: 400px;
  max-width: 100%;
  background-color: #444;
  transition: .1s;

  .show-lateral &{
    transform: translateX(0);
    transition: .3s;
  }
  
  &__content{
    padding: 1em;
    color: #fff;
    line-height: 1.4em;
    max-height: 90%;
    overflow: auto;
  }
}

#button{
  padding: 1em;
  background-color: #fff;
  display: inline-block;
  &:hover{
    cursor: pointer;
  }
}

#close{
  color: #fff;
  margin: 20px;
  display: inline-block;
  &:hover{
    cursor: pointer;
  }
}
!

JS

            
              $(document).ready(function(){
	$('#button, #close').click(function() {
		$('body').toggleClass('show-lateral');
  }); 	
});
!
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