Input Group

Custom 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-primary" 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-primary" type="button">Button</button>
</div>
Input Groups
@
@example.com
https://example.com/users/
$ .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>
<label for="basic-url" class="form-label">Your vanity URL</label>
<div class="input-group mb-3">
    <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">
</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>
Multiple inputs
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>
Checkboxes and radios 
<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 addons 
<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>
Segmented buttons 
<div class="input-group mb-3">
    <button type="button" class="btn btn-primary">Action</button>
    <button type="button"
        class="btn btn-primary 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="javascript:void(0);">Action</a></li>
        <li><a class="dropdown-item" href="javascript:void(0);">Another action</a></li>
        <li><a class="dropdown-item" href="javascript:void(0);">Something else here</a></li>
        <li>
            <hr class="dropdown-divider">
        </li>
        <li><a class="dropdown-item" href="javascript:void(0);">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-primary">Action</button>
    <button type="button"
        class="btn btn-primary 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="javascript:void(0);">Action</a></li>
        <li><a class="dropdown-item" href="javascript:void(0);">Another action</a></li>
        <li><a class="dropdown-item" href="javascript:void(0);">Something else here</a></li>
        <li>
            <hr class="dropdown-divider">
        </li>
        <li><a class="dropdown-item" href="javascript:void(0);">Separated link</a></li>
    </ul>
</div>
Warpping
@ 
<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>
Buttons addons 
<div class="input-group mb-3">
<button class="btn btn-primary" 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">
<button class="btn btn-primary" type="button"
id="button-addon">Button</button>
<input type="text" class="form-control" placeholder="Recipient's username"
aria-label="Recipient's username" aria-describedby="button-addon">

</div>
<div class="input-group mb-3">
<button class="btn btn-primary" type="button">Button</button>
<button class="btn btn-primary" 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-primary" type="button">Button</button>
<button class="btn btn-primary" type="button">Button</button>
</div>
Sizing
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>
Buttons with dropdowns 
<div class="input-group mb-3">
<button class="btn btn-primary dropdown-toggle" type="button"
data-bs-toggle="dropdown" aria-expanded="false">Dropdown</button>
<ul class="dropdown-menu">
<li><a class="dropdown-item" href="javascript:void(0);">Action</a></li>
<li><a class="dropdown-item" href="javascript:void(0);">Another action</a></li>
<li><a class="dropdown-item" href="javascript:void(0);">Something else here</a></li>
<li>
    <hr class="dropdown-divider">
</li>
<li><a class="dropdown-item" href="javascript:void(0);">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-primary 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="javascript:void(0);">Action</a></li>
<li><a class="dropdown-item" href="javascript:void(0);">Another action</a></li>
<li><a class="dropdown-item" href="javascript:void(0);">Something else here</a></li>
<li>
    <hr class="dropdown-divider">
</li>
<li><a class="dropdown-item" href="javascript:void(0);">Separated link</a></li>
</ul>
</div>
<div class="input-group">
<button class="btn btn-primary-transparent dropdown-toggle" type="button"
data-bs-toggle="dropdown" aria-expanded="false">Dropdown</button>
<ul class="dropdown-menu">
<li><a class="dropdown-item" href="javascript:void(0);">Action before</a></li>
<li><a class="dropdown-item" href="javascript:void(0);">Another action before</a></li>
<li><a class="dropdown-item" href="javascript:void(0);">Something else here</a></li>
<li>
    <hr class="dropdown-divider">
</li>
<li><a class="dropdown-item" href="javascript:void(0);">Separated link</a></li>
</ul>
<input type="text" class="form-control"
aria-label="Text input with 2 dropdown buttons">
<button class="btn btn-primary-transparent 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="javascript:void(0);">Action</a></li>
<li><a class="dropdown-item" href="javascript:void(0);">Another action</a></li>
<li><a class="dropdown-item" href="javascript:void(0);">Something else here</a></li>
<li>
    <hr class="dropdown-divider">
</li>
<li><a class="dropdown-item" href="javascript:void(0);">Separated link</a></li>
</ul>
</div>
Custom file input 
<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-primary" 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-primary" type="button"
id="inputGroupFileAddon04">Button</button>
</div>