Principe

Possibilité d'ajouter des textes et/ou des boutons de part et d'autre d'un champs de saisie ou d'un select.

Exemple de base

Ne pas omettre de placer les label en dehors du groupe de champs de saisie.

@
@example.com
https://example.com/users/
Example help text goes outside the input group.
$ .00
@
With textarea
<div class="input-group mb-3">
    <span class="input-group-text" id="basic-addon1">@</span>
    <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">
    <span class="input-group-text" id="basic-addon2">@example.com</span>
</div>

<div class="mb-3">
    <label for="basic-url" class="form-label">Your vanity URL</label>
    <div class="input-group">
        <span class="input-group-text" id="basic-addon3">https://example.com/users/</span>
        <input type="text" class="form-control" id="basic-url" aria-describedby="basic-addon3 basic-addon4">
    </div>
    <div class="form-text" id="basic-addon4">Example help text goes outside the input group.</div>
</div>

<div class="input-group mb-3">
    <span class="input-group-text">$</span>
    <input type="text" class="form-control" aria-label="Amount (to the nearest dollar)">
    <span class="input-group-text">.00</span>
</div>

<div class="input-group mb-3">
    <input type="text" class="form-control" placeholder="Username" aria-label="Username">
    <span class="input-group-text">@</span>
    <input type="text" class="form-control" placeholder="Server" aria-label="Server">
</div>

<div class="input-group">
    <span class="input-group-text">With textarea</span>
    <textarea class="form-control" aria-label="With textarea"></textarea>
</div>
Wrapping

Il est nécessaire d'empêcher le retour à la ligne en ajoutant la classe .flex-nowrap sur l'.input-group.

@
<div class="input-group flex-nowrap">
    <span class="input-group-text" id="addon-wrapping">@</span>
    <input type="text" class="form-control" placeholder="Username" aria-label="Username" aria-describedby="addon-wrapping">
</div>
Design
Border Radius

Les border-radius sont appliqués au premier et au dernier éléments d'un .input-group mais tout élément invisble à une de ces position entrainera un affichage incorrect.

@
<div class="input-group">
    <span class="input-group-text" id="visible-addon">@</span>
    <input type="text" class="form-control" placeholder="Username" aria-label="Username" aria-describedby="visible-addon">
    <input type="text" class="form-control d-none" placeholder="Hidden input" aria-label="Hidden input" aria-describedby="visible-addon">
</div>
Size

Possibilité d'obtenir une taille plus petite ou plus grande d'un input-group en ajoutant la classe .input-group-sm ou .input-group-lg directement sur le conteneur .input-group.

Small
Default
Large
<div class="input-group input-group-sm mb-3">
    <span class="input-group-text" id="inputGroup-sizing-sm">Small</span>
    <input type="text" class="form-control" aria-label="Sizing example input" aria-describedby="inputGroup-sizing-sm">
</div>

<div class="input-group mb-3">
    <span class="input-group-text" id="inputGroup-sizing-default">Default</span>
    <input type="text" class="form-control" aria-label="Sizing example input" aria-describedby="inputGroup-sizing-default">
</div>

<div class="input-group input-group-lg">
    <span class="input-group-text" id="inputGroup-sizing-lg">Large</span>
    <input type="text" class="form-control" aria-label="Sizing example input" aria-describedby="inputGroup-sizing-lg">
</div>
Checkbox & Radio

Possibilité de placer des cases à cocher ou des boutons radio dans les éléments complémentaires.
Recommandation d'ajouter .mt-0 sur .form-check-input lorsqu'aucun texte n'est visible à côté du champ.

<div class="input-group mb-3">
    <div class="input-group-text">
        <input class="form-check-input mt-0" type="checkbox" value="" aria-label="Checkbox for following text input">
    </div>
    <input type="text" class="form-control" aria-label="Text input with checkbox">
</div>

<div class="input-group">
    <div class="input-group-text">
        <input class="form-check-input mt-0" type="radio" value="" aria-label="Radio button for following text input">
    </div>
    <input type="text" class="form-control" aria-label="Text input with radio button">
</div>
Multiple
Input
First and last name
<div class="input-group">
    <span class="input-group-text">First and last name</span>
    <input type="text" aria-label="First name" class="form-control">
    <input type="text" aria-label="Last name" class="form-control">
</div>
Addons
$ 0.00
$ 0.00
<div class="input-group mb-3">
    <span class="input-group-text">$</span>
    <span class="input-group-text">0.00</span>
    <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)">
    <span class="input-group-text">$</span>
    <span class="input-group-text">0.00</span>
</div>
Buttons
<div class="input-group mb-3">
    <button class="btn btn-outline-secondary" type="button" id="button-addon1">Button</button>
    <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">
    <button class="btn btn-outline-secondary" type="button" id="button-addon2">Button</button>
</div>

<div class="input-group mb-3">
    <button class="btn btn-outline-secondary" type="button">Button</button>
    <button class="btn btn-outline-secondary" type="button">Button</button>
    <input type="text" class="form-control" placeholder="" aria-label="Example text with two button addons">
</div>

<div class="input-group">
    <input type="text" class="form-control" placeholder="Recipient’s username" aria-label="Recipient’s username with two button addons">
    <button class="btn btn-outline-secondary" type="button">Button</button>
    <button class="btn btn-outline-secondary" type="button">Button</button>
</div>
& dropdown
<div class="input-group mb-3">
    <button class="btn btn-outline-secondary dropdown-toggle" type="button" data-bs-toggle="dropdown" aria-expanded="false">Dropdown</button>
    <ul class="dropdown-menu">
        <li><a class="dropdown-item" href="#">Action</a></li>
        <li><a class="dropdown-item" href="#">Another action</a></li>
        <li><a class="dropdown-item" href="#">Something else here</a></li>
        <li><hr class="dropdown-divider"></li>
        <li><a class="dropdown-item" href="#">Separated link</a></li>
    </ul>
    <input type="text" class="form-control" aria-label="Text input with dropdown button">
</div>

<div class="input-group mb-3">
    <input type="text" class="form-control" aria-label="Text input with dropdown button">
    <button class="btn btn-outline-secondary dropdown-toggle" type="button" data-bs-toggle="dropdown" aria-expanded="false">Dropdown</button>
    <ul class="dropdown-menu dropdown-menu-end">
        <li><a class="dropdown-item" href="#">Action</a></li>
        <li><a class="dropdown-item" href="#">Another action</a></li>
        <li><a class="dropdown-item" href="#">Something else here</a></li>
        <li><hr class="dropdown-divider"></li>
        <li><a class="dropdown-item" href="#">Separated link</a></li>
    </ul>
</div>

<div class="input-group">
    <button class="btn btn-outline-secondary dropdown-toggle" type="button" data-bs-toggle="dropdown" aria-expanded="false">Dropdown</button>
    <ul class="dropdown-menu">
        <li><a class="dropdown-item" href="#">Action before</a></li>
        <li><a class="dropdown-item" href="#">Another action before</a></li>
        <li><a class="dropdown-item" href="#">Something else here</a></li>
        <li><hr class="dropdown-divider"></li>
        <li><a class="dropdown-item" href="#">Separated link</a></li>
    </ul>
    <input type="text" class="form-control" aria-label="Text input with 2 dropdown buttons">
    <button class="btn btn-outline-secondary dropdown-toggle" type="button" data-bs-toggle="dropdown" aria-expanded="false">Dropdown</button>
    <ul class="dropdown-menu dropdown-menu-end">
        <li><a class="dropdown-item" href="#">Action</a></li>
        <li><a class="dropdown-item" href="#">Another action</a></li>
        <li><a class="dropdown-item" href="#">Something else here</a></li>
        <li><hr class="dropdown-divider"></li>
        <li><a class="dropdown-item" href="#">Separated link</a></li>
    </ul>
</div>
& mode segmenté
<div class="input-group mb-3">
    <button type="button" class="btn btn-outline-secondary">Action</button>
    <button type="button" class="btn btn-outline-secondary dropdown-toggle dropdown-toggle-split" data-bs-toggle="dropdown" aria-expanded="false">
        <span class="visually-hidden">Toggle Dropdown</span>
    </button>
    <ul class="dropdown-menu">
        <li><a class="dropdown-item" href="#">Action</a></li>
        <li><a class="dropdown-item" href="#">Another action</a></li>
        <li><a class="dropdown-item" href="#">Something else here</a></li>
        <li><hr class="dropdown-divider"></li>
        <li><a class="dropdown-item" href="#">Separated link</a></li>
    </ul>
    <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">
    <button type="button" class="btn btn-outline-secondary">Action</button>
    <button type="button" class="btn btn-outline-secondary dropdown-toggle dropdown-toggle-split" data-bs-toggle="dropdown" aria-expanded="false">
        <span class="visually-hidden">Toggle Dropdown</span>
    </button>
    <ul class="dropdown-menu dropdown-menu-end">
        <li><a class="dropdown-item" href="#">Action</a></li>
        <li><a class="dropdown-item" href="#">Another action</a></li>
        <li><a class="dropdown-item" href="#">Something else here</a></li>
        <li><hr class="dropdown-divider"></li>
        <li><a class="dropdown-item" href="#">Separated link</a></li>
    </ul>
</div>
Customisation
Select
<div class="input-group mb-3">
    <label class="input-group-text" for="inputGroupSelect01">Options</label>
    <select class="form-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="form-select" id="inputGroupSelect02">
        <option selected>Choose...</option>
        <option value="1">One</option>
        <option value="2">Two</option>
        <option value="3">Three</option>
    </select>
    <label class="input-group-text" for="inputGroupSelect02">Options</label>
</div>

<div class="input-group mb-3">
    <button class="btn btn-outline-secondary" type="button">Button</button>
    <select class="form-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="form-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>
    <button class="btn btn-outline-secondary" type="button">Button</button>
</div>
Input File
<div class="input-group mb-3">
    <label class="input-group-text" for="inputGroupFile01">Upload</label>
    <input type="file" class="form-control" id="inputGroupFile01">
</div>

<div class="input-group mb-3">
    <input type="file" class="form-control" id="inputGroupFile02">
    <label class="input-group-text" for="inputGroupFile02">Upload</label>
</div>

<div class="input-group mb-3">
    <button class="btn btn-outline-secondary" type="button" id="inputGroupFileAddon03">Button</button>
    <input type="file" class="form-control" id="inputGroupFile03" aria-describedby="inputGroupFileAddon03" aria-label="Upload">
</div>

<div class="input-group">
    <input type="file" class="form-control" id="inputGroupFile04" aria-describedby="inputGroupFileAddon04" aria-label="Upload">
    <button class="btn btn-outline-secondary" type="button" id="inputGroupFileAddon04">Button</button>
</div>
CSS
Variables SASS
$input-group-addon-padding-y:           $input-padding-y;
$input-group-addon-padding-x:           $input-padding-x;
$input-group-addon-font-weight:         $input-font-weight;
$input-group-addon-color:               $input-color;
$input-group-addon-bg:                  var(--#{$prefix}tertiary-bg);
$input-group-addon-border-color:        $input-border-color;