Input Group

<!-- Input Group -->
<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>
<!-- /input group -->

<!-- Input Group -->
<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>
<!-- /input group -->

<!-- Input Group -->
<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>
<!-- /input group -->

<!-- Input Group -->
<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>
<!-- /input group -->

<!-- Input Group -->
<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>
<!-- /input group -->

<!-- Input Group -->
<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="Small" aria-describedby="inputGroup-sizing-sm">
</div>
<!-- /input group -->

<!-- Input Group -->
<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="Default" aria-describedby="inputGroup-sizing-default">
</div>
<!-- /input group -->

<!-- Input Group -->
<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="Large" aria-describedby="inputGroup-sizing-sm">
</div>
<!-- /input group -->

<!-- Input Group -->
<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>
<!-- /input group -->

<!-- Input Group -->
<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>
<!-- /input group -->

<!-- Input Group -->
<div class="input-group">
    <div class="input-group-prepend">
        <span class="input-group-text">First and last name</span>
    </div>
    <input type="text" class="form-control">
    <input type="text" class="form-control">
</div>
<!-- /input group -->

<!-- Input Group -->
<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="Amount (to the nearest dollar)">
</div>
<!-- /input group -->

<!-- Input Group -->
<div class="input-group">
    <input type="text" class="form-control" aria-label="Amount (to the nearest dollar)">
    <div class="input-group-append">
        <span class="input-group-text">$</span>
        <span class="input-group-text">0.00</span>
    </div>
</div>
<!-- /input group -->

<!-- Input Group -->
<div class="input-group mb-3">
    <div class="input-group-prepend">
        <button class="btn btn-outline-primary" type="button">Button</button>
    </div>
    <input type="text" class="form-control" placeholder="" aria-label="" aria-describedby="basic-addon1">
</div>
<!-- /input group -->

<!-- Input Group -->
<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">
        <button class="btn btn-outline-primary" type="button">Button</button>
    </div>
</div>
<!-- /input group -->

<!-- Input Group -->
<div class="input-group mb-3">
    <div class="input-group-prepend">
        <button class="btn btn-outline-primary" type="button">Button</button>
        <button class="btn btn-outline-primary" type="button">Button</button>
    </div>
    <input type="text" class="form-control" placeholder="" aria-label="" aria-describedby="basic-addon1">
</div>
<!-- /input group -->

<!-- Input Group -->
<div class="input-group">
    <input type="text" class="form-control" placeholder="Recipient's username" aria-label="Recipient's username" aria-describedby="basic-addon2">
    <div class="input-group-append">
        <button class="btn btn-outline-primary" type="button">Button</button>
        <button class="btn btn-outline-primary" type="button">Button</button>
    </div>
</div>
<!-- /input group -->

<!-- Input Group -->
<div class="input-group mb-3">
    <div class="input-group-prepend">
        <button class="btn btn-outline-primary dropdown-toggle" type="button" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
            Dropdown
        </button>

        <!-- Dropdown Menu -->
        <div class="dropdown-menu">
            <a class="dropdown-item" href="javascript:void(0)">Action</a>
            <a class="dropdown-item" href="javascript:void(0)">Another action</a>
            <a class="dropdown-item" href="javascript:void(0)">Something else here</a>
            <div role="separator" class="dropdown-divider"></div>
            <a class="dropdown-item" href="javascript:void(0)">Separated link</a>
        </div>
        <!-- /dropdown menu -->

    </div>
    <input type="text" class="form-control" aria-label="Text input with dropdown button">
</div>
<!-- /input group -->

<!-- Input Group -->
<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-primary dropdown-toggle" type="button" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
            Dropdown
        </button>

        <!-- Dropdown Menu -->
        <div class="dropdown-menu">
            <a class="dropdown-item" href="javascript:void(0)">Action</a>
            <a class="dropdown-item" href="javascript:void(0)">Another action</a>
            <a class="dropdown-item" href="javascript:void(0)">Something else here</a>
            <div role="separator" class="dropdown-divider"></div>
            <a class="dropdown-item" href="javascript:void(0)">Separated link</a>
        </div>
        <!-- /dropdown menu -->

    </div>
</div>
<!-- /input group -->

<!-- Input Group -->
<div class="input-group mb-3">
    <div class="input-group-prepend">
        <button type="button" class="btn btn-outline-primary">Action</button>
        <button type="button" class="btn btn-outline-primary dropdown-toggle dropdown-toggle-split" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
            <span class="sr-only">Toggle Dropdown</span>
        </button>

        <!-- Dropdown Menu -->
        <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>
        <!-- /dropdown menu -->

    </div>
    <input type="text" class="form-control" aria-label="Text input with segmented dropdown button">
</div>
<!-- /input group -->

<!-- Input Group -->
<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-primary">Action</button>
        <button type="button" class="btn btn-outline-primary dropdown-toggle dropdown-toggle-split" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
            <span class="sr-only">Toggle Dropdown</span>
        </button>

        <!-- Dropdown Menu -->
        <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>
        <!-- /dropdown menu -->

    </div>
</div>
<!-- /input group -->

<!-- Input Group -->
<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>
<!-- /input group -->

<!-- Input Group -->
<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>
<!-- /input group -->

<!-- Input Group -->
<div class="input-group mb-3">
    <div class="input-group-prepend">
        <button class="btn btn-outline-primary" type="button">Button</button>
    </div>
    <select class="custom-select" id="inputGroupSelect03">
        <option selected="">Choose...</option>
        <option value="1">One</option>
        <option value="2">Two</option>
        <option value="3">Three</option>
    </select>
</div>
<!-- /input group -->

<!-- Input Group -->

<div class="input-group">
    <select class="custom-select" id="inputGroupSelect04">
        <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-primary" type="button">Button</button>
    </div>
</div>
<!-- /input group -->

<!-- Input Group -->
<div class="input-group mb-3">
    <div class="input-group-prepend">
        <span class="input-group-text">Upload</span>
    </div>
    <div class="custom-file">
        <input type="file" class="custom-file-input" id="inputGroupFile01">
        <label class="custom-file-label" for="inputGroupFile01">Choose file</label>
    </div>
</div>
<!-- /input group -->

<!-- Input Group -->
<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">Choose file</label>
    </div>
    <div class="input-group-append">
        <span class="input-group-text">Upload</span>
    </div>
</div>
<!-- /input group -->

<!-- Input Group -->
<div class="input-group mb-3">
    <div class="input-group-prepend">
        <button class="btn btn-outline-primary" type="button">Button</button>
    </div>
    <div class="custom-file">
        <input type="file" class="custom-file-input" id="inputGroupFile03">
        <label class="custom-file-label" for="inputGroupFile03">Choose file</label>
    </div>
</div>
<!-- /input group -->

<!-- Input Group -->

<div class="input-group">
    <div class="custom-file">
        <input type="file" class="custom-file-input" id="inputGroupFile04">
        <label class="custom-file-label" for="inputGroupFile04">Choose file</label>
    </div>
    <div class="input-group-append">
        <button class="btn btn-outline-primary" type="button">Button</button>
    </div>
</div>
<!-- /input group -->