Bootstrap 5 floating label for a textarea overlaps with input on scroll

Question

Looking at the documentation for a floating label of a textarea, https://getbootstrap.com/docs/5.0/forms/floating-labels/, it appears that the label overlaps with the input if the content is scrollable:

Is there a way to prevent this and make the scrollable area below the label?

Answer 1

It's a known issue of Bootstrap 5: #32800.

What I have done is a small hack until they fix this bug.

Basically I put a pseudo element between the textarea and label with a white background color.

.form-floating {
  position: relative;
  max-width: 300px; /* not relevant */
  margin: 40px 20px; /* not relevant */
}

.form-floating:before {
  content: '';
  position: absolute;
  top: 1px; /* border-width (default by BS) */
  left: 1px; /* border-width (default by BS) */
  width: calc(100% - 14px); /* to show scrollbar */
  height: 32px;
  border-radius: 4px; /* (default by BS) */
  background-color: #ffffff;
}

.form-floating textarea.form-control {
  padding-top: 32px; /* height of pseudo element */
  min-height: 80px; /* not relevant */
}

<link href="https://cdn.jsdelivr.net/npm/[email protected]/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-eOJMYsd53ii+scO/bJGFsiCZc+5NDVN2yr8+0RDqr0Ql0h+rP48ckxlpbzKgwra6" crossorigin="anonymous">

<div class="form-floating fix-floating-label">
    <textarea class="form-control" placeholder="Leave a comment here" id="floatingTextarea"></textarea>
  <label for="floatingTextarea">Comments</label>
</div>

Answer 2

First add class like input_textarea to parent div which is textarea input then add this css:

.form-floating.input_textarea label {
    min-width: 90%;
}

    .form-floating.input_textarea label::before {
        content: "";
        position: absolute;
        top: 0.9em;
        z-index: -1;
        width: 100%;
        height: 1.2em;
        background-color: white;
        box-shadow: 0 0 8px 4px #ffffff;
    }


.form-floating.input_textarea > .form-control:focus ~ label, .form-floating.input_textarea > .form-control:not(:placeholder-shown) ~ label, .form-floating.input_textarea > .form-select ~ label {
    opacity: 0.95;
    color: gray;
}