Move placeholder above the input on focus

Question

I'm looking for css code that move the placeholder text above the input on focus. I found this code here. This code is perfect but my input tag is wrapped inside <span> and for that reason general sibling selector is not working. Any ideas how to edit this css?

<div>
  <span class='blocking-span'>
  <input type="text" class="inputText" />
  </span>
  <span class="floating-label">Your email address</span>
</div>

Answer 1

You can use the CSS pseudo-selector :placeholder-shown in this case to detect when to move a fake placeholder out of the way. See example below:

label {
  margin:20px 0;
  position:relative;
  display:inline-block;
}
  
span {
  padding:10px;
  pointer-events: none;
  position:absolute;
  left:0;
  top:0;
  transition: 0.2s;
  transition-timing-function: ease;
  transition-timing-function: cubic-bezier(0.25, 0.1, 0.25, 1);
  opacity:0.5;
}

input {
  padding:10px;
}

input:focus + span, input:not(:placeholder-shown) + span {
  opacity:1;
  transform: scale(0.75) translateY(-100%) translateX(-30px);
}

/* For IE Browsers*/
input:focus + span, input:not(:-ms-input-placeholder) + span {
  opacity:1;
  transform: scale(0.75) translateY(-100%) translateX(-30px);
}

<label>
  <input placeholder=" ">
  <span>Placeholder Text</span>
</label>

Answer 2

With the given links CSS etc, simply move the floating-label inside the blocking-span.

By using position: relative on the div the floating-label will still re-position as if it were outside the blocking-span

div {
  position: relative; /*  make label relate to div  */
  padding-top: 10px;  /*  make space for label      */
}
.inputText {
  font-size: 14px;
  width: 200px;
  height: 25px;
}
.floating-label {
  position: absolute;
  pointer-events: none;
  left: 15px;
  top: 18px;
  transition: 0.2s ease all;
}
input:focus ~ .floating-label,
input:not(:focus):valid ~ .floating-label {
  top: -6px;
}

<div>
  <span class='blocking-span'>
    <input type="text" class="inputText" required/>
    <span class="floating-label">Your email address</span>
  </span>
</div>