在单击textbox css时制作一个类似按钮的小图标

<input type="text" id="myTextbox">
<button id="myButton">按钮</button>

#myTextbox {
  padding: 10px;
}

#myButton {
  padding: 10px;
  background-color: #ccc;
  border: none;
  color: #fff;
  position: relative;
}

#myButton::before {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 20px;
  height: 20px;
  background-color: #fff;
  border-radius: 50%;
}

document.getElementById("myButton").addEventListener("click", function() {
  var textboxValue = document.getElementById("myTextbox").value;
  console.log(textboxValue);
});