Bootstrap 4 Form Inputs
Supported Form Controls
Bootstrap supports the following form controls:
- input
- textarea
- checkbox
- radio
- select
Bootstrap Input
Bootstrap supports all the HTML5 input types: text, password, datetime, datetime-local, date, month, time, week, number, email, url, search, tel, and color.
Note: Inputs will NOT be fully styled if their type is not properly declared!
The following example contains two input elements; one of type="text" and one of type="password". As we mentioned in the Forms chapter, we use the .form-control class to style inputs with full-width and proper padding, etc:
Example
<div class="form-group">
<label for="usr">Name:</label>
<input type="text" class="form-control" id="usr">
</div>
<div class="form-group">
<label for="pwd">Password:</label>
<input type="password" class="form-control" id="pwd">
</div>
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Bootstrap Textarea
The following example contains a textarea:
Example
<div class="form-group">
<label for="comment">Comment:</label>
<textarea class="form-control" rows="5" id="comment"></textarea>
</div>
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Bootstrap Checkboxes
Checkboxes are used if you want the user to select any number of options from a list of preset options.
The following example contains three checkboxes. The last option is disabled:
Example
<div class="form-check">
<label class="form-check-label">
<input type="checkbox" class="form-check-input" value="">Option 1
</label>
</div>
<div class="form-check">
<label class="form-check-label">
<input type="checkbox" class="form-check-input" value="">Option 2
</label>
</div>
<div class="form-check">
<label class="form-check-label">
<input type="checkbox" class="form-check-input" value="" disabled>Option 3
</label>
</div>
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Example explained
Use a wrapper element with class="form-check" to ensure proper margins for labels and checkboxes.
Add the .form-check-label class to label elements, and .form-check-input to style checkboxes properly inside the .form-check container.
Inline Checkboxes
Use the .form-check-inline class if you want the checkboxes to appear on the same line:
Example
<div class="form-check-inline">
<label class="form-check-label">
<input type="checkbox" class="form-check-input" value="">Option 1
</label>
</div>
<div class="form-check-inline">
<label class="form-check-label">
<input type="checkbox" class="form-check-input" value="">Option 2
</label>
</div>
<div class="form-check-inline">
<label class="form-check-label">
<input type="checkbox" class="form-check-input" value="" disabled>Option 3
</label>
</div>
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Bootstrap Radio Buttons
Radio buttons are used if you want to limit the user to just one selection from a list of preset options.
The following example contains three radio buttons. The last option is disabled:
Example
<div class="form-check">
<label class="form-check-label">
<input type="radio" class="form-check-input" name="optradio">Option 1
</label>
</div>
<div class="form-check">
<label class="form-check-label">
<input type="radio" class="form-check-input" name="optradio">Option 2
</label>
</div>
<div class="form-check disabled">
<label class="form-check-label">
<input type="radio" class="form-check-input" name="optradio" disabled>Option 3
</label>
</div>
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As with checkboxes, use the .form-check-inline class if you want the radio buttons to appear on the same line:
Example
<div class="form-check-inline">
<label class="form-check-label">
<input type="radio" class="form-check-input" name="optradio">Option 1
</label>
</div>
<div class="form-check-inline">
<label class="form-check-label">
<input type="radio" class="form-check-input" name="optradio">Option 2
</label>
</div>
<div class="form-check-inline disabled">
<label class="form-check-label">
<input type="radio" class="form-check-input" name="optradio" disabled>Option 3
</label>
</div>
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Bootstrap Select List
Select lists are used if you want to allow the user to pick from multiple options.
The following example contains a dropdown list (select list):
Example
<div class="form-group">
<label for="sel1">Select list:</label>
<select class="form-control" id="sel1">
<option>1</option>
<option>2</option>
<option>3</option>
<option>4</option>
</select>
</div>
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Form Control Sizing
Change the size of the form control with .form-control-sm or .form-control-lg:
Example
<input type="text" class="form-control form-control-sm">
<input type="text" class="form-control form-control">
<input type="text" class="form-control form-control-lg">
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Form Control with Plain Text
Use the .form-control-plaintext if you want to style the input field as plain text:
Form Control File and Range
Add the .form-control-range class to input type"range" or .form-control-file to input type"file" to style a range control or a file field with full-width:
Example
<input type="range" class="form-control-range">
<input type="file" class="form-control-file border">
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