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Etichette flottanti

Crea etichette di forma meravigliosamente simplici chì fluttuanu sopra i vostri campi di input.

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Esempiu

Imbulighjate un paru di <input class="form-control">è <label>elementi .form-floatingper attivà etichette flottanti cù i campi di forma testuale di Bootstrap. A placeholderhè necessariu nantu à ognunu <input>postu chì u nostru metudu di etichette flottanti solu CSS usa u :placeholder-shownpseudo-elementu. Innota ancu chì u <input>deve vene prima per pudè utilizà un selettore di fratellu (per esempiu, ~).

html 
<div class="form-floating mb-3">
  <input type="email" class="form-control" id="floatingInput" placeholder="[email protected]">
  <label for="floatingInput">Email address</label>
</div>
<div class="form-floating">
  <input type="password" class="form-control" id="floatingPassword" placeholder="Password">
  <label for="floatingPassword">Password</label>
</div>

Quandu ci hè un valuedighjà definitu, <label>s s'adattanu automaticamente à a so pusizioni flottante.

html 
<form class="form-floating">
  <input type="email" class="form-control" id="floatingInputValue" placeholder="[email protected]" value="[email protected]">
  <label for="floatingInputValue">Input with value</label>
</form>

Stili di validazione di forma funziona ancu cum'è previstu.

html 
<form class="form-floating">
  <input type="email" class="form-control is-invalid" id="floatingInputInvalid" placeholder="[email protected]" value="[email protected]">
  <label for="floatingInputInvalid">Invalid input</label>
</form>

Zone di testu

Par défaut, <textarea>s avec .form-controlsera la même hauteur que <input>s.

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

Per stabilisce una altezza persunalizata nantu à u vostru <textarea>, ùn utilizate micca l' rowsattributu. Invece, stabilisce un esplicitu height(o inline o via CSS persunalizata).

html 
<div class="form-floating">
  <textarea class="form-control" placeholder="Leave a comment here" id="floatingTextarea2" style="height: 100px"></textarea>
  <label for="floatingTextarea2">Comments</label>
</div>

Selezziunate

Oltre à .form-control, e etichette flottanti sò dispunibuli solu nantu à .form-selects. Funcionanu in u listessu modu, ma à u cuntrariu <input>di s, sempre mostranu u <label>in u so statu fluttu. Selezziunate cù sizeè multipleùn sò micca supportati.

html 
<div class="form-floating">
  <select class="form-select" id="floatingSelect" aria-label="Floating label select example">
    <option selected>Open this select menu</option>
    <option value="1">One</option>
    <option value="2">Two</option>
    <option value="3">Three</option>
  </select>
  <label for="floatingSelect">Works with selects</label>
</div>

Lettura solu testu chjaru

L'etichette flottanti supportanu ancu .form-control-plaintext, chì ponu esse utili per bascà da un valore editable <input>à un valore di testu chjaru senza affettà u layout di pagina.

html 
<div class="form-floating mb-3">
  <input type="email" readonly class="form-control-plaintext" id="floatingEmptyPlaintextInput" placeholder="[email protected]">
  <label for="floatingEmptyPlaintextInput">Empty input</label>
</div>
<div class="form-floating mb-3">
  <input type="email" readonly class="form-control-plaintext" id="floatingPlaintextInput" placeholder="[email protected]" value="[email protected]">
  <label for="floatingPlaintextInput">Input with value</label>
</div>

Gruppi di input

L'etichette flottanti supportanu ancu .input-group.

@
html 
<div class="input-group mb-3">
  <span class="input-group-text">@</span>
  <div class="form-floating">
    <input type="text" class="form-control" id="floatingInputGroup1" placeholder="Username">
    <label for="floatingInputGroup1">Username</label>
  </div>
</div>

Quandu s'utilice .input-groupè .form-floatinginseme cù a validazione di forma, -feedbackdeve esse piazzatu fora di u .form-floating, ma à l'internu di u .input-group. Questu significa chì u feedback deve esse mostratu cù javascript.

@
Per piacè sceglite un nome d'utilizatore.
html 
<div class="input-group has-validation">
  <span class="input-group-text">@</span>
  <div class="form-floating is-invalid">
    <input type="text" class="form-control is-invalid" id="floatingInputGroup2" placeholder="Username" required>
    <label for="floatingInputGroup2">Username</label>
  </div>
  <div class="invalid-feedback">
    Please choose a username.
  </div>
</div>

Disposizione

Quandu travaglia cù u sistema di griglia Bootstrap, assicuratevi di mette elementi di forma in classi di colonna.

html 
<div class="row g-2">
  <div class="col-md">
    <div class="form-floating">
      <input type="email" class="form-control" id="floatingInputGrid" placeholder="[email protected]" value="[email protected]">
      <label for="floatingInputGrid">Email address</label>
    </div>
  </div>
  <div class="col-md">
    <div class="form-floating">
      <select class="form-select" id="floatingSelectGrid">
        <option selected>Open this select menu</option>
        <option value="1">One</option>
        <option value="2">Two</option>
        <option value="3">Three</option>
      </select>
      <label for="floatingSelectGrid">Works with selects</label>
    </div>
  </div>
</div>

Sass

Variabili

$form-floating-height:            add(3.5rem, $input-height-border);
$form-floating-line-height:       1.25;
$form-floating-padding-x:         $input-padding-x;
$form-floating-padding-y:         1rem;
$form-floating-input-padding-t:   1.625rem;
$form-floating-input-padding-b:   .625rem;
$form-floating-label-opacity:     .65;
$form-floating-label-transform:   scale(.85) translateY(-.5rem) translateX(.15rem);
$form-floating-transition:        opacity .1s ease-in-out, transform .1s ease-in-out;