Elements:Forms
Form Elements
Using the classes .form-control (for inputs, selects, etc) and .form-group for wrappers you can consistently style and layout forms.
Input examples
Examples of how the various input elements look when .form-control is applied.
Rounded Input Form Controls
Use the class .form-control-rounded to input elements to make them rounded, this can be used in combination with the rounded buttons and input groups.
Inline Forms
Use the class .form-inline to form elements to make .form-control elements within the form display inline.
Extended Example
Grid Layouts
Forms support the default Bootstrap grid functionality so you can use the .col-BREAKPOINT-WIDTH width classes throughout your forms.
You can also add the class .col-form-label to label elements to vertically center them with the row content.
Form control sizes
You can enlarge or shrink .form-control elements by adding the classes .form-control-lg or .form-control-sm .
Input elements
Select elements
Within a grid layout
Hidden labels
When space is low it can be useful to hide form labels and use the HTML5 placeholder attribute on input elements to show the label inside the form element instead.
Simply add class="sr-only" to the label element and then move the label text to a placeholder attribute on the input element instead.
Static form controls
Sometimes it's useful to form data to a user but not let them change it, this is where you can use the class .form-control-static on a p within your forms.
Disabled form elements & readonly inputs
You can disable single form elements by applying the boolean attribute disabled to them OR apply it to a fieldset wrapper to disable all form elements within the fieldset.
Single input
Fieldset
Readonly
Apply the readonly style by adding the boolean attribute readonly to any form input. Readonly elements cannot be altered.
Help text
Sometimes it's useful to tell users what information is needed for a given form field and this is where you can use the .form-text on any static element within form groups to provide help text. Use p tags for block level text and small or span tags to show inline.
You could also use tooltips as well.
Your password must be 8-20 characters long, contain letters and numbers, and must not contain spaces, special characters, or emoji.
Inline
Tooltip form help
Validation states
Validation states help give users an instance visual feedback on whether their form input has passed validation. There are 3 clasess for this: .has-success , .has-warning & .has-error
In horizontal forms
On checkboxes
Toggles
Simply add data data-toggle="switch" to any radio or checkbox element:
Example:
Find more examples at Bootstrap Switch.