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In this tutorial, you will learn how to show folder icon content on hover with CSS. Watch the video below for a detailed tutorial.
<body>
    <div class="folder">
        <div class="file">
            <h3>1</h3>
        </div>
        <div class="file">
            <h3>2</h3>
        </div>
        <div class="file">
            <h3>3</h3>
        </div>
    </div>
</body>body {
  margin: 0;
  background-color: #2e3537;
  font-family: 'Arial', sans-serif;
}
.folder {
  background: #016a8b;
  width: 130px;
  height: 90px;
  position: absolute;
  top: 40%;
  left: 45%;
  border-radius: 5px;
  cursor: pointer;
}
.folder:before {
  content: '';
  position: absolute;
  background-color: #0380a7;
  width: 130px;
  height: 90px;
  top: 10px;
  left: 0;
  border-radius: 5px;
  z-index: 99;
  box-shadow: 0px -2px 10px rgba(0,0,0,0.5);
  transition: all 0.5s;
}
.folder:after {
  content: '';
  position: absolute;
  width: 60px;
  height: 20px;
  top: -8px;
  left: 0;
  background: #016a8b;
  border-radius: 5px;
}
.file {
  position: absolute;
  width: 60px;
  height: 70px;
  top: 0;
  border-radius: 5px;
  box-shadow: 3px 3px 5px rgba(0,0,0,0.5);
  text-align: center;
  color: white;
  font-size: 17px;
  transition: all 1s;
}
.folder .file:nth-child(1) {
  background-color: #e41515;
  z-index: 3;
  left: 15px;
}
.folder .file:nth-child(2) {
  background-color: #83C3A6;
  z-index: 2;
  left: 35px;
}
.folder .file:nth-child(3) {
  background-color: #F4BA44;
  z-index: 1;
  left: 50px;
}
.folder:hover:before {
  transform: rotateX(20deg);
}
.folder:hover .file:nth-child(1) {
  transform: translate(-100%, -130%);
}
.folder:hover .file:nth-child(2) {
  transform: translate(0%, -130%);
}
.folder:hover .file:nth-child(3) {
  transform: translate(100%, -130%);
}