console 命令行工具 X clear

console

<i class="btn"></i>

.btn {
  display: inline-block;
  width: 50px;
  height: 50px;
  background-color: red;
  border-radius: 25px;
  transition: padding 1s ease;
  padding: 0 25px;
}

.btn.active {
  padding: 0;
}