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.form-floating {
position: relative;
> .form-control,
> .form-control-plaintext,
> .form-select {
height: $form-floating-height;
min-height: $form-floating-height;
line-height: $form-floating-line-height;
}
> label {
position: absolute;
top: 0;
left: 0;
z-index: 2;
height: 100%; // allow textareas
padding: $form-floating-padding-y $form-floating-padding-x;
overflow: hidden;
text-align: start;
text-overflow: ellipsis;
white-space: nowrap;
pointer-events: none;
border: $input-border-width solid transparent; // Required for aligning label's text with the input as it affects inner box model
transform-origin: 0 0;
@include transition($form-floating-transition);
}
> .form-control,
> .form-control-plaintext {
padding: $form-floating-padding-y $form-floating-padding-x;
&::placeholder {
color: transparent;
}
&:focus,
&:not(:placeholder-shown) {
padding-top: $form-floating-input-padding-t;
padding-bottom: $form-floating-input-padding-b;
}
// Duplicated because `:-webkit-autofill` invalidates other selectors when grouped
&:-webkit-autofill {
padding-top: $form-floating-input-padding-t;
padding-bottom: $form-floating-input-padding-b;
}
}
> .form-select {
padding-top: $form-floating-input-padding-t;
padding-bottom: $form-floating-input-padding-b;
}
> .form-control:focus,
> .form-control:not(:placeholder-shown),
> .form-control-plaintext,
> .form-select {
~ label {
color: rgba(var(--#{$prefix}body-color-rgb), #{$form-floating-label-opacity});
transform: $form-floating-label-transform;
&::after {
position: absolute;
inset: $form-floating-padding-y ($form-floating-padding-x * .5);
z-index: -1;
height: $form-floating-label-height;
content: "";
background-color: $input-bg;
@include border-radius($input-border-radius);
}
}
}
// Duplicated because `:-webkit-autofill` invalidates other selectors when grouped
> .form-control:-webkit-autofill {
~ label {
color: rgba(var(--#{$prefix}body-color-rgb), #{$form-floating-label-opacity});
transform: $form-floating-label-transform;
}
}
> .form-control-plaintext {
~ label {
border-width: $input-border-width 0; // Required to properly position label text - as explained above
}
}
> :disabled ~ label,
> .form-control:disabled ~ label { // Required for `.form-control`s because of specificity
color: $form-floating-label-disabled-color;
&::after {
background-color: $input-disabled-bg;
}
}
}
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