Inputs

Be sure to use an appropriate type attribute on all inputs (e.g., code email for email address or number for numerical information) to take advantage of newer input controls like email verification, number selection, and more.

Add disabled to an <input>, <select>, or <button> to block interactions, with Bootstrap styling them accordingly. Controls inside a <fieldset disabled> are also disabled. For <a> elements, Bootstrap uses pointer-events: none; and reduced opacity instead.

Set heights using classes like .form-control-lg, .form-control-sm and for custom inputs, you can use .form-select-sm, .form-select-lg, and set widths using grid column classes like .col-lg-*

You can easily alter the border, border-radius and padding using the utility classes.