Bootstrap Input Sizing

Bootstrap provides classes to adjust the size of input elements in your forms. Here are the classes you can use to change the size of inputs:

.form-control-lg: Makes the input element larger.
.form-control-sm: Makes the input element smaller.

Here’s an example of how to use these classes:

				
					<input class="form-control form-control-lg" type="text" placeholder="Large input">
<input class="form-control" type="text" placeholder="Default input">
<input class="form-control form-control-sm" type="text" placeholder="Small input">

In this example, we have used the form-control-lg class to make the first input element larger, and the form-control-sm class to make the third input element smaller. The second input element has no size class, so it uses the default size.

You can use these size classes with any type of input element, including text inputs, select inputs, and textarea inputs. This can be helpful if you want to adjust the appearance of your forms to better match your design requirements.

Point

InputGroup Button Add-ons: Extend the functionality of your inputs by incorporating buttons as add-ons within input groups. Bootstrap’s input-group-append and input-group-prepend classes facilitate the seamless integration of buttons for actions like submitting or clearing form data.
FormControl Feedback: Bootstrap provides feedback styles for form controls with validation. Utilize classes such as is-valid and is-invalid to dynamically apply styles, offering users immediate visual cues about the validity of their input.
InputGroup Multiple Add-ons: For advanced form designs, Bootstrap supports input groups with multiple add-ons. This allows you to combine various components within a single input group, such as buttons, dropdowns, and text, enhancing the versatility of your forms.
FormControl Size in Buttons: Bootstrap’s button sizing classes (btn-lg, btn-sm, etc.) can be combined with form controls to ensure consistency in sizing when buttons and inputs are used together within a form.
Custom Forms: Bootstrap offers custom form styles for checkboxes, radio buttons, and selects. These can be seamlessly integrated into your forms, providing a consistent appearance and behavior across different browsers.
Floating Labels: Bootstrap introduces the concept of floating labels, allowing labels to “float” above the input when the user starts typing. This feature enhances the visual appeal of forms and improves the user experience.
InputGroup Text Add-ons: In addition to buttons, Bootstrap allows you to add text-based add-ons to input groups. This can include contextual information or units, providing users with additional guidance.
Control Sizing within Modals: Consider adjusting input sizing when working with modals to ensure a balanced and visually appealing form layout. Bootstrap provides specific classes like form-control-lg and form-control-sm for modal content.
Form Control Plain Text with Sizing: Bootstrap allows plain text inputs to be sized using classes like form-control-lg and form-control-sm. This can be useful when displaying non-editable information in various sizes.
FormControl with Prepend and Append: Leverage Bootstrap’s input-group to combine prepend and append elements to your form controls. This is particularly helpful for creating complex form layouts with added visual elements.

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Bootstrap Input Sizing