index.html

<!DOCTYPE html>
<html lang="en" dir="ltr">
  <head>
    <meta charset="utf-8">
    <title></title>
    <link rel="stylesheet" href="style.css">
    <link rel="stylesheet" href="https://use.fontawesome.com/releases/v5.8.1/css/all.css">
    <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
  </head>


    <div class="middle">
      <div class="sm-container">
        <i class="show-btn fas fa-user"></i>
        <div class="sm-menu">
          <a href="#"><i class="fab fa-facebook-f"></i></a>
          <a href="#"><i class="fab fa-twitter"></i></a>
          <a href="#"><i class="fab fa-instagram"></i></a>
          <a href="#"><i class="fab fa-youtube"></i></a>
          <a href="#"><i class="fab fa-whatsapp"></i></a>
        </div>
      </div>
    </div>


    <script>
      $(".show-btn").click(function(){
        $(".sm-menu").fadeToggle("fast");
      });
    </script>
  </body>
</html>

style.css

body{
  margin: 0;
  padding: 0;
  background: #9c88ff;
}

.middle{
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%,-50%);
}

.sm-container{
  text-align: center;
}

.sm-container i{
  color: #f5f6fa;
  padding: 20px;
  font-size: 20px;
  cursor: pointer;
  transition: 0.4s;
}

.sm-container i:hover{
  transform: scale(1.2);
}

.sm-menu{
  background: #487eb0;
  position: absolute;
  border-radius: 8px;
  display: none;
}

.sm-menu::before{
  content: "";
  width: 10px;
  height: 10px;
  background: #487eb0;
  position: absolute;
  top: -5px;
  left: 50%;
  transform: translateX(-50%) rotate(45deg);
}

让链接同时具备两种打开方式