Customize the native <select>s with custom CSS that changes the element’s initial appearance.
Default
Custom <select>menus need only a custom class,.form-selectto trigger the custom styles. Custom styles are limited to the <select>’s initial appearance and cannot modify the <option>s due to browser limitations.
<select class="form-select" aria-label="Default select example"><option selected>Open this select menu</option><option value="1">One</option><option value="2">Two</option><option value="3">Three</option></select>Sizing
Set heights using classes like .form-control-lgand .form-control-sm.
<select class="form-select form-select-lg mb-3" aria-label=".form-select-lg example"><option selected>Open this select menu</option><option value="1">One</option><option value="2">Two</option><option value="3">Three</option></select><select class="form-select form-select-sm" aria-label=".form-select-sm example"><option selected>Open this select menu</option><option value="1">One</option><option value="2">Two</option><option value="3">Three</option></select>
The multipleattribute is also supported:
<select class="form-select" multiple aria-label="multiple select example"><option selected>Open this select menu</option><option value="1">One</option><option value="2">Two</option><option value="3">Three</option></select>
As is the sizeattribute:
<select class="form-select" size="3" aria-label="size 3 select example"><option selected>Open this select menu</option><option value="1">One</option><option value="2">Two</option><option value="3">Three</option></select>Disabled
Add the disabledboolean attribute on a select to give it a grayed out appearance and remove pointer events.
<select class="form-select" aria-label="Disabled select example" disabled><option selected>Open this select menu</option><option value="1">One</option><option value="2">Two</option><option value="3">Three</option></select>