<div class="body">
  <div class="search">
    <div class="bar"></div>
  </div>
  <input type="text" class="input" autofocus>
</div>
body {
  padding: 0;
  margin: 0;
}
::placeholder {
  color: #ECEFF1;
}
.body {
  width: 100vw;
  height: 100vh;
  background: linear-gradient(to right, #00BCD4, #5C6BC0);
}
.input {
  display:none;
  background: transparent;
  color: white;
  position: absolute;
  left: 54.7%;
  top: 49%;
  transform: translate(-70%, -60%);
  width: 440px;
  height: 40px;
  border-radius: 100px;
  padding: 30px;
  font-size: 50px;
  border: none;
}
.input:focus {
  outline: none;
}
.search {
  background: transparent;
  width: 100px;
  height: 100px;
  border-radius: 100px;
  border: 20px solid white;
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-70%, -60%);
  box-shadow: 0px 5px 10px rgba(0,0,0,.3);
}
.bar {
  height: 80px;
  width: 30px;
  border-radius: 50px;
  background: white;
  position: absolute;
  top: 90%;
  left: 100%;
  transform: rotate(-45deg);
  box-shadow: 0px 5px 10px rgba(0,0,0,.3);
}
View Compiled
$(".search").click(function() {
  if($(".search").css("width")=="100px")
    {
      $(".bar").animate({
        height: "0px",
        left: "80%"
      }, 400);
      setTimeout(function() {
        $(".search").animate({
          width: "500px",
          left: "55%"
        });
        $(".input").css("display", "initial");
      }, 400);
      setTimeout(function() {
        $(".input").attr("placeholder", "Search").focus();
      }, 900);
    }
  else {
    $(".search").animate({
        width: "100px",
        left: "50%"
      });
      $(".input").css("display", "none");
      setTimeout(function() {
        $(".bar").animate({
          height: "80px",
          left: "100%"
        }, 400);
      }, 400);
  }
});
$(".body").click(function() {
  if($(".search").css("width")=="500px") {
      $(".search").animate({
        width: "100px",
        left: "50%"
      });
      $(".input").css("display", "none");
      setTimeout(function() {
        $(".bar").animate({
          height: "80px",
          left: "100%"
        }, 400);
      }, 400);
     }
});

External CSS

This Pen doesn't use any external CSS resources.

External JavaScript

  1. https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js