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CSS

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HTML 

              
                #app
!

CSS 

              
                //Global Styles and Mixins

@mixin font-stack{
  font-family: 'Raleway', sans-serif;
}

$background-opacity: .5;

.hidden{
  opacity:0;
}

@mixin absolute-position-center(){
  position:absolute;
  top:0;
  bottom:0;
  left:0;
  right:0;
  margin:auto;
}

@mixin border-radius($radius) {
  -webkit-border-radius: $radius;
  border-radius: $radius;
  background-clip: padding-box;
}

@mixin box-shadow() {
  -webkit-box-shadow: 0px 0px 59px 5px rgba(0,0,0,0.48);
-moz-box-shadow: 0px 0px 59px 5px rgba(0,0,0,0.48);
box-shadow: 0px 0px 59px 5px rgba(0,0,0,0.48);
}

@mixin keyframes( $animationName )
{
    @-webkit-keyframes $animationName {
        @content;
    }
    @-moz-keyframes $animationName {
        @content;
    }
    @-o-keyframes $animationName {
        @content;
    }
    @keyframes $animationName {
        @content;
    }
}
*{
  box-sizing:border-box;
  @include font-stack;
  font-weight:500;
  color:#222;
}

body{
  width:100%;
  height:100vh;
  background: #16a085; /* Old browsers */
  /* Permalink - use to edit and share this gradient: http://colorzilla.com/gradient-editor/#1abc9c+0,16a085+100 */
  background: #1abc9c; /* Old browsers */
  background: -moz-linear-gradient(top,  #1abc9c 0%, #16a085 100%); /* FF3.6-15 */
  background: -webkit-linear-gradient(top,  #1abc9c 0%,#16a085 100%); /* Chrome10-25,Safari5.1-6 */
  background: linear-gradient(to bottom,  #1abc9c 0%,#16a085 100%); /* W3C, IE10+, FF16+, Chrome26+, Opera12+, Safari7+ */
  filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#1abc9c', endColorstr='#16a085',GradientType=0 ); /* IE6-9 */
  overflow:hidden;
}

.opener{
  @include absolute-position-center;
  width:250px;
  height:80px;
  color:#16a085;
  background-color:white;
  border:none;
  font-size:2em;
  font-weight:700;
  z-index:20;
}

#above{
  z-index:20;
}

#below{
  z-index:0;
}

::-webkit-scrollbar {
    width: 0px;  /* remove scrollbar space */
    background: transparent;  /* optional: just make scrollbar invisible */
}
/* optional: show position indicator in red */
::-webkit-scrollbar-thumb {
    background: #FF0000;
}


.opener:hover{
  cursor:pointer;
}

#pop-up{
  @include absolute-position-center();
  @include box-shadow();
  width:90%;
  opacity:0;
  max-height:450px;
  max-width:1000px;
  height:90%;
  background-color:white;
  z-index:10;
  overflow:hidden;
  .border-overlay{
    @include absolute-position-center;
    width:100%;
    height:100%;
    .white{
      width:100%;
      height:100%;
      border:20px solid white;
    }
  }
  .photo{
    display:inline-block;
    float:left;
    width:50%;
    height:100%;
    overflow: auto;
    object-position: center;
    object-size:cover;
    img{
      max-height:100%;
    }
  }
  .text{
    display:inline-block;
    float:left;
    width:50%;
    height:90%;
    margin:2.5% 0;
    padding:0 40px;
    h1{
      font-weight:900;
      font-size:4vw;
      margin:0;
    }
    p{
    width: 90%;
    font-weight: 500;
    font-size: 1.2em;
    line-height: 1.8em;
    }
    button{
      background-color:#16a085;
      border:none;
      font-size:1.7em;
      margin:20px 0;
      padding:10px 40px;
      color:white;
      cursor:pointer;
    }
    .close{
      position:absolute;
      top:-10px;
      right:40px;
      width:10px;
      font-weight:700;
      font-size:2em;
      color:white;
      cursor:pointer;
    }
  }
  hr{
    width: 40%;
    height: 10px;
    margin:10px auto 30px 0;
    border: none;
    outline: none;
    background-color: #333;
    color: grey;
  }
}

#innerPopUp{
  height:100%;
  overflow: auto;
  opacity:0;
}

.fade-in{
  animation: fadeIn 1.3s ease forwards 1s;
}

.fade-out{
  animation: fadeOut 1.3s ease forwards;
}

.animate-in{
  animation: popIn 1.3s cubic-bezier(.87,-.41,.19,1.22) forwards;
}

.animate-out{
  animation: popOut 1.3s cubic-bezier(.87,-.41,.19,1.22) forwards;
}

@keyframes fadeIn{
  from{
    transform:translateY(-20px);
    opacity:0;
  }
  to{
    transform:translateY(0px);
    opacity:1;
  }
}
@keyframes popIn{
  0%{
    opacity:0;
    transform:scale(0,0);
  }
  60%{
    opacity:1;
    transform:scale(1,1);
  }
  100%{
    opacity:1;
    transform:scale(1,1);
  }
}

@keyframes popOut{
  0%{
    z-index:100;
    opacity:1;
    transform:scale(1,1);
  }
  60%{
    z-index:0;
    opacity:.1;
    transform:scale(.001,.001);
  }
  100%{
    opacity:0;
    transform:scale(0,0);
  }
}

@include keyframes( pop-in ){
  0%{
    opacity:0;
    transform:scale(0,0);
  }
  100%{
    opacity:1;
    transform:scale(1,1);
  }
}
!

JS 

              
                class PopUp extends React.Component{
    constructor(){
      super();
      this.state = {
        animation_name : '',
        depth: '',
        fade: ''
      };
    }
  
    closePopUp(){
      this.setState({animation_name: 'animate-out'});
      this.setState({depth:'above'});
       this.setState({fade:'fade-out'});
    }
    openPopUp(){
      this.setState({animation_name: 'animate-in'});
      this.setState({depth:'below'});
      this.setState({fade:'fade-in'});
    }

    render(){
        return (
          <div>
            <button className="opener" id={this.state.depth} onClick={this.openPopUp.bind(this)}>Open Pop Up</button>
            <section id="pop-up" className={this.state.animation_name}>
              <div id="innerPopUp" className={this.state.fade}>
                <div className="border-overlay">
                  <div className="white"></div>
                  <div className="black"></div>
                </div>
                <div className="text">
                  <h1>Hey there</h1>
                  <hr/>
                  <p className="close" onClick={this.closePopUp.bind(this)}>X</p>
                  <p>Just checking in, but maybe did you want to sign up for out newsletter? I hear that all the cool kids are doing it. Plus we might giving away from free stuff. Your choice.</p>
                  <button>Check it out</button>
                </div>
                <div className="photo">
                  <img src="https://static.pexels.com/photos/57905/pexels-photo-57905.jpeg"/>
                </div>
              </div>
            </section>
          </div>
        );
    }
}

 ReactDOM.render(
    <PopUp />,
    document.getElementById('app')
);
!
999px

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