Bootstrap4 Input Groups

We can use the .input-group class to add more styles to form input fields, such as icons, text, or buttons.

Using the .input-group-prepend class, we can add text information before the input field, and the .input-group-append class to add it after the input field.

Lastly, we also need to use the .input-group-text class to style the text.

Bootstrap4 Example

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

  <div class="input-group mb-3">
    <input type="text" class="form-control" placeholder="Your Email">
    <div class="input-group-append">
      <span class="input-group-text">@tutorialpro.org</span>
    </div>
  </div>
</form>

Input Sizing

Use the .input-group-sm class for small input fields and the .input-group-lg class for large input fields:

Bootstrap4 Example

<form>
  <div class="input-group mb-3 input-group-sm">
     <div class="input-group-prepend">
       <span class="input-group-text">Small</span>
    </div>
    <input type="text" class="form-control">
  </div>
</form>
<form>
  <div class="input-group mb-3">
    <div class="input-group-prepend">
      <span class="input-group-text">Default</span>
    </div>
    <input type="text" class="form-control">
  </div>
</form>
<form>
  <div class="input-group mb-3 input-group-lg">
    <div class="input-group-prepend">
      <span class="input-group-text">Large</span>
    </div>
    <input type="text" class="form-control">
  </div>
</form>

Multiple Inputs and Text

Bootstrap4 Example

<!-- Multiple Inputs -->
<form>
  <div class="input-group mb-3">
    <div class="input-group-prepend">
      <span class="input-group-text">Person</span>
    </div>
    <input type="text" class="form-control" placeholder="First Name">
    <input type="text" class="form-control" placeholder="Last Name">
  </div>
</form>

<!-- Multiple Text Information -->
<form>
  <div class="input-group mb-3">
    <div class="input-group-prepend">
      <span class="input-group-text">One</span>
      <span class="input-group-text">Two</span>
      <span class="input-group-text">Three</span>
    </div>
    <input type="text" class="form-control">
  </div>
</form>

Checkboxes and Radio Buttons

Text information can be replaced with checkboxes and radio buttons:

Bootstrap4 Example

<div class="input-group mb-3">
  <div class="input-group-prepend">
    <div class="input-group-text">
      <input type="checkbox"> 
    </div>
  </div>
  <input type="text" class="form-control" placeholder="tutorialpro">
</div>

<div class="input-group mb-3">
  <div class="input-group-prepend">
    <div class="input-group-text">
      <input type="radio"> 
    </div>
  </div>
  <input type="text" class="form-control" placeholder="GOOGLE">
</div>

Adding Button Groups to Input Fields

Bootstrap4 Example

<div class="input-group mb-3">
  <div class="input-group-prepend">
    <button class="btn btn-outline-secondary" type="button">Basic Button</button> 
  </div>
  <input type="text" class="form-control" placeholder="Some text">
</div>

<div class="input-group mb-3">
  <input type="text" class="form-control" placeholder="Search">
  <div class="input-group-append">
    <button class="btn btn-success" type="submit">Go</button> 
  </div>
</div>

<div class="input-group mb-3">
  <input type="text" class="form-control" placeholder="Something clever..">
  <div class="input-group-append">
    <button class="btn btn-primary" type="button">OK</button> 
    <button class="btn btn-danger" type="button">Cancel</button> 
  </div>
</div>

Setting Up Dropdown Menus

Adding dropdown menus to input fields does not require the use of the .dropdown class.

Bootstrap4 Example

<div class="input-group mt-3 mb-3">
  <div class="input-group-prepend">
    <button type="button" class="btn btn-outline-secondary dropdown-toggle" data-toggle="dropdown">
      Select Website
    </button>
    <div class="dropdown-menu">
      <a class="dropdown-item" href="https://www.google.com">GOOGLE</a>
      <a class="dropdown-item" href="https://www.tutorialpro.org">tutorialpro</a>
      <a class="dropdown-item" href="https://www.taobao.com">TAOBAO</a>
    </div>
  </div>
  <input type="text" class="form-control" placeholder="Website address">
</div>

Input Group Labels

Labels for input groups can be set by placing the label outside the input group. The label's for attribute should correspond to the input group's id, allowing the input field to be focused upon clicking the label:

Bootstrap4 Example

<label for="demo">Write your email here:</label>
<div class="input-group mb-3">

<input type="text" class="form-control" placeholder="Email" id="demo" name="email">
  <div class="input-group-append">
    <span class="input-group-text">@tutorialpro.org</span>
  </div>
</div>