in English
Grupo de entrada
Amplía facilmente os controis do formulario engadindo texto, botóns ou grupos de botóns a cada lado das entradas textuais, seleccións personalizadas e entradas de ficheiros personalizadas.
Exemplo básico
Coloque un complemento ou botón a cada lado dunha entrada. Tamén pode colocar un a ambos os dous lados dunha entrada. Lembra colocar <label>
s fóra do grupo de entrada.
Copiar
<div class= "input-group mb-3" >
<div class= "input-group-prepend" >
<span class= "input-group-text" id= "basic-addon1" > @</span>
</div>
<input type= "text" class= "form-control" placeholder= "Username" aria-label= "Username" aria-describedby= "basic-addon1" >
</div>
<div class= "input-group mb-3" >
<input type= "text" class= "form-control" placeholder= "Recipient's username" aria-label= "Recipient's username" aria-describedby= "basic-addon2" >
<div class= "input-group-append" >
<span class= "input-group-text" id= "basic-addon2" > @example.com</span>
</div>
</div>
<label for= "basic-url" > Your vanity URL</label>
<div class= "input-group mb-3" >
<div class= "input-group-prepend" >
<span class= "input-group-text" id= "basic-addon3" > https://example.com/users/</span>
</div>
<input type= "text" class= "form-control" id= "basic-url" aria-describedby= "basic-addon3" >
</div>
<div class= "input-group mb-3" >
<div class= "input-group-prepend" >
<span class= "input-group-text" > $</span>
</div>
<input type= "text" class= "form-control" aria-label= "Amount (to the nearest dollar)" >
<div class= "input-group-append" >
<span class= "input-group-text" > .00</span>
</div>
</div>
<div class= "input-group" >
<div class= "input-group-prepend" >
<span class= "input-group-text" > With textarea</span>
</div>
<textarea class= "form-control" aria-label= "With textarea" ></textarea>
</div>
Envoltura
Os grupos de entrada se envolven por defecto mediante flex-wrap: wrap
para acomodar a validación de campos de formulario personalizados dentro dun grupo de entrada. Podes desactivalo con .flex-nowrap
.
Copiar
<div class= "input-group flex-nowrap" >
<div class= "input-group-prepend" >
<span class= "input-group-text" id= "addon-wrapping" > @</span>
</div>
<input type= "text" class= "form-control" placeholder= "Username" aria-label= "Username" aria-describedby= "addon-wrapping" >
</div>
Talla
Engade as clases relativas de tamaño do formulario ao .input-group
propio e os contidos dentro redimensionaranse automaticamente, sen necesidade de repetir as clases de tamaño de control do formulario en cada elemento.
Non se admite o tamaño dos elementos individuais do grupo de entrada.
Copiar
<div class= "input-group input-group-sm mb-3" >
<div class= "input-group-prepend" >
<span class= "input-group-text" id= "inputGroup-sizing-sm" > Small</span>
</div>
<input type= "text" class= "form-control" aria-label= "Sizing example input" aria-describedby= "inputGroup-sizing-sm" >
</div>
<div class= "input-group mb-3" >
<div class= "input-group-prepend" >
<span class= "input-group-text" id= "inputGroup-sizing-default" > Default</span>
</div>
<input type= "text" class= "form-control" aria-label= "Sizing example input" aria-describedby= "inputGroup-sizing-default" >
</div>
<div class= "input-group input-group-lg" >
<div class= "input-group-prepend" >
<span class= "input-group-text" id= "inputGroup-sizing-lg" > Large</span>
</div>
<input type= "text" class= "form-control" aria-label= "Sizing example input" aria-describedby= "inputGroup-sizing-lg" >
</div>
Caixas de verificación e radios
Coloque calquera caixa de verificación ou opción de radio dentro do complemento dun grupo de entrada en lugar de texto.
Copiar
<div class= "input-group mb-3" >
<div class= "input-group-prepend" >
<div class= "input-group-text" >
<input type= "checkbox" aria-label= "Checkbox for following text input" >
</div>
</div>
<input type= "text" class= "form-control" aria-label= "Text input with checkbox" >
</div>
<div class= "input-group" >
<div class= "input-group-prepend" >
<div class= "input-group-text" >
<input type= "radio" aria-label= "Radio button for following text input" >
</div>
</div>
<input type= "text" class= "form-control" aria-label= "Text input with radio button" >
</div>
Aínda que se admiten visualmente varios <input>
s, os estilos de validación só están dispoñibles para os grupos de entrada cun único <input>
.
Copiar
<div class= "input-group" >
<div class= "input-group-prepend" >
<span class= "input-group-text" > First and last name</span>
</div>
<input type= "text" aria-label= "First name" class= "form-control" >
<input type= "text" aria-label= "Last name" class= "form-control" >
</div>
Múltiples complementos
Admítense varios complementos e pódense mesturar con caixas de verificación e versións de entrada de radio.
Copiar
<div class= "input-group mb-3" >
<div class= "input-group-prepend" >
<span class= "input-group-text" > $</span>
<span class= "input-group-text" > 0.00</span>
</div>
<input type= "text" class= "form-control" aria-label= "Dollar amount (with dot and two decimal places)" >
</div>
<div class= "input-group" >
<input type= "text" class= "form-control" aria-label= "Dollar amount (with dot and two decimal places)" >
<div class= "input-group-append" >
<span class= "input-group-text" > $</span>
<span class= "input-group-text" > 0.00</span>
</div>
</div>
Copiar
<div class= "input-group mb-3" >
<div class= "input-group-prepend" >
<button class= "btn btn-outline-secondary" type= "button" id= "button-addon1" > Button</button>
</div>
<input type= "text" class= "form-control" placeholder= "" aria-label= "Example text with button addon" aria-describedby= "button-addon1" >
</div>
<div class= "input-group mb-3" >
<input type= "text" class= "form-control" placeholder= "Recipient's username" aria-label= "Recipient's username" aria-describedby= "button-addon2" >
<div class= "input-group-append" >
<button class= "btn btn-outline-secondary" type= "button" id= "button-addon2" > Button</button>
</div>
</div>
<div class= "input-group mb-3" >
<div class= "input-group-prepend" id= "button-addon3" >
<button class= "btn btn-outline-secondary" type= "button" > Button</button>
<button class= "btn btn-outline-secondary" type= "button" > Button</button>
</div>
<input type= "text" class= "form-control" placeholder= "" aria-label= "Example text with two button addons" aria-describedby= "button-addon3" >
</div>
<div class= "input-group" >
<input type= "text" class= "form-control" placeholder= "Recipient's username" aria-label= "Recipient's username with two button addons" aria-describedby= "button-addon4" >
<div class= "input-group-append" id= "button-addon4" >
<button class= "btn btn-outline-secondary" type= "button" > Button</button>
<button class= "btn btn-outline-secondary" type= "button" > Button</button>
</div>
</div>
Copiar
<div class= "input-group mb-3" >
<div class= "input-group-prepend" >
<button class= "btn btn-outline-secondary dropdown-toggle" type= "button" data-toggle= "dropdown" aria-haspopup= "true" aria-expanded= "false" > Dropdown</button>
<div class= "dropdown-menu" >
<a class= "dropdown-item" href= "#" > Action</a>
<a class= "dropdown-item" href= "#" > Another action</a>
<a class= "dropdown-item" href= "#" > Something else here</a>
<div role= "separator" class= "dropdown-divider" ></div>
<a class= "dropdown-item" href= "#" > Separated link</a>
</div>
</div>
<input type= "text" class= "form-control" aria-label= "Text input with dropdown button" >
</div>
<div class= "input-group" >
<input type= "text" class= "form-control" aria-label= "Text input with dropdown button" >
<div class= "input-group-append" >
<button class= "btn btn-outline-secondary dropdown-toggle" type= "button" data-toggle= "dropdown" aria-haspopup= "true" aria-expanded= "false" > Dropdown</button>
<div class= "dropdown-menu" >
<a class= "dropdown-item" href= "#" > Action</a>
<a class= "dropdown-item" href= "#" > Another action</a>
<a class= "dropdown-item" href= "#" > Something else here</a>
<div role= "separator" class= "dropdown-divider" ></div>
<a class= "dropdown-item" href= "#" > Separated link</a>
</div>
</div>
</div>
Copiar
<div class= "input-group mb-3" >
<div class= "input-group-prepend" >
<button type= "button" class= "btn btn-outline-secondary" > Action</button>
<button type= "button" class= "btn btn-outline-secondary dropdown-toggle dropdown-toggle-split" data-toggle= "dropdown" aria-haspopup= "true" aria-expanded= "false" >
<span class= "sr-only" > Toggle Dropdown</span>
</button>
<div class= "dropdown-menu" >
<a class= "dropdown-item" href= "#" > Action</a>
<a class= "dropdown-item" href= "#" > Another action</a>
<a class= "dropdown-item" href= "#" > Something else here</a>
<div role= "separator" class= "dropdown-divider" ></div>
<a class= "dropdown-item" href= "#" > Separated link</a>
</div>
</div>
<input type= "text" class= "form-control" aria-label= "Text input with segmented dropdown button" >
</div>
<div class= "input-group" >
<input type= "text" class= "form-control" aria-label= "Text input with segmented dropdown button" >
<div class= "input-group-append" >
<button type= "button" class= "btn btn-outline-secondary" > Action</button>
<button type= "button" class= "btn btn-outline-secondary dropdown-toggle dropdown-toggle-split" data-toggle= "dropdown" aria-haspopup= "true" aria-expanded= "false" >
<span class= "sr-only" > Toggle Dropdown</span>
</button>
<div class= "dropdown-menu" >
<a class= "dropdown-item" href= "#" > Action</a>
<a class= "dropdown-item" href= "#" > Another action</a>
<a class= "dropdown-item" href= "#" > Something else here</a>
<div role= "separator" class= "dropdown-divider" ></div>
<a class= "dropdown-item" href= "#" > Separated link</a>
</div>
</div>
</div>
Os grupos de entrada inclúen soporte para seleccións personalizadas e entradas de ficheiros personalizadas. Non se admiten as versións predeterminadas do navegador.
Selección personalizada
Copiar
<div class= "input-group mb-3" >
<div class= "input-group-prepend" >
<label class= "input-group-text" for= "inputGroupSelect01" > Options</label>
</div>
<select class= "custom-select" id= "inputGroupSelect01" >
<option selected > Choose...</option>
<option value= "1" > One</option>
<option value= "2" > Two</option>
<option value= "3" > Three</option>
</select>
</div>
<div class= "input-group mb-3" >
<select class= "custom-select" id= "inputGroupSelect02" >
<option selected > Choose...</option>
<option value= "1" > One</option>
<option value= "2" > Two</option>
<option value= "3" > Three</option>
</select>
<div class= "input-group-append" >
<label class= "input-group-text" for= "inputGroupSelect02" > Options</label>
</div>
</div>
<div class= "input-group mb-3" >
<div class= "input-group-prepend" >
<button class= "btn btn-outline-secondary" type= "button" > Button</button>
</div>
<select class= "custom-select" id= "inputGroupSelect03" aria-label= "Example select with button addon" >
<option selected > Choose...</option>
<option value= "1" > One</option>
<option value= "2" > Two</option>
<option value= "3" > Three</option>
</select>
</div>
<div class= "input-group" >
<select class= "custom-select" id= "inputGroupSelect04" aria-label= "Example select with button addon" >
<option selected > Choose...</option>
<option value= "1" > One</option>
<option value= "2" > Two</option>
<option value= "3" > Three</option>
</select>
<div class= "input-group-append" >
<button class= "btn btn-outline-secondary" type= "button" > Button</button>
</div>
</div>
Copiar
<div class= "input-group mb-3" >
<div class= "input-group-prepend" >
<span class= "input-group-text" id= "inputGroupFileAddon01" > Upload</span>
</div>
<div class= "custom-file" >
<input type= "file" class= "custom-file-input" id= "inputGroupFile01" aria-describedby= "inputGroupFileAddon01" >
<label class= "custom-file-label" for= "inputGroupFile01" > Choose file</label>
</div>
</div>
<div class= "input-group mb-3" >
<div class= "custom-file" >
<input type= "file" class= "custom-file-input" id= "inputGroupFile02" >
<label class= "custom-file-label" for= "inputGroupFile02" aria-describedby= "inputGroupFileAddon02" > Choose file</label>
</div>
<div class= "input-group-append" >
<span class= "input-group-text" id= "inputGroupFileAddon02" > Upload</span>
</div>
</div>
<div class= "input-group mb-3" >
<div class= "input-group-prepend" >
<button class= "btn btn-outline-secondary" type= "button" id= "inputGroupFileAddon03" > Button</button>
</div>
<div class= "custom-file" >
<input type= "file" class= "custom-file-input" id= "inputGroupFile03" aria-describedby= "inputGroupFileAddon03" >
<label class= "custom-file-label" for= "inputGroupFile03" > Choose file</label>
</div>
</div>
<div class= "input-group" >
<div class= "custom-file" >
<input type= "file" class= "custom-file-input" id= "inputGroupFile04" aria-describedby= "inputGroupFileAddon04" >
<label class= "custom-file-label" for= "inputGroupFile04" > Choose file</label>
</div>
<div class= "input-group-append" >
<button class= "btn btn-outline-secondary" type= "button" id= "inputGroupFileAddon04" > Button</button>
</div>
</div>
Accesibilidade
Asegúrese de que todos os controis do formulario teñan un nome accesible e axeitado para que o seu propósito se poida transmitir aos usuarios de tecnoloxías de asistencia. O xeito máis sinxelo de conseguilo é utilizar un <label>
elemento ou, no caso dos botóns, incluír texto suficientemente descritivo como parte do <button>...</button>
contido.
Para situacións nas que non é posible incluír un <label>
contido de texto visible ou apropiado, existen formas alternativas de proporcionar un nome accesible, como:
<label>
elementos ocultos usando a .visually-hidden
clase
Apuntando a un elemento existente que pode actuar como etiqueta usandoaria-labelledby
Proporcionando un title
atributo
Configurar explícitamente o nome accesible nun elemento usandoaria-label
Se ningunha destas está presente, as tecnoloxías de asistencia poden recorrer ao uso do placeholder
atributo como alternativa para o nome <input>
e os <textarea>
elementos accesibles. Os exemplos desta sección proporcionan algúns enfoques suxeridos e específicos para cada caso.
Aínda que o uso de contido visualmente oculto ( .sr-only
, aria-label
, e mesmo placeholder
contido, que desaparece unha vez que un campo de formulario ten contido) beneficiará aos usuarios de tecnoloxía de asistencia, a falta de texto de etiqueta visible aínda pode ser problemática para certos usuarios. Algún tipo de etiqueta visible é xeralmente o mellor enfoque, tanto para a accesibilidade como para a usabilidade.