Borders
Use border utilities to quickly style the border and border-radius of an element. Great for images, buttons, or any other element.
On this page
Border
Use border utilities to add or remove an element’s borders. Choose from all borders or one at a time.
Additive
<span class="border"></span>
<span class="border-top"></span>
<span class="border-end"></span>
<span class="border-bottom"></span>
<span class="border-start"></span>Subtractive
<span class="border-0"></span>
<span class="border-top-0"></span>
<span class="border-end-0"></span>
<span class="border-bottom-0"></span>
<span class="border-start-0"></span>Border color
Change the border color using utilities built on our theme colors.
<span class="border border-primary"></span>
<span class="border border-secondary"></span>
<span class="border border-success"></span>
<span class="border border-danger"></span>
<span class="border border-warning"></span>
<span class="border border-info"></span>
<span class="border border-light"></span>
<span class="border border-dark"></span>
<span class="border border-white"></span>Border-width
<span class="border border-1"></span>
<span class="border border-2"></span>
<span class="border border-3"></span>
<span class="border border-4"></span>
<span class="border border-5"></span>Border-radius
Add classes to an element to easily round its corners.
<img src="..." class="rounded" alt="...">
<img src="..." class="rounded-top" alt="...">
<img src="..." class="rounded-end" alt="...">
<img src="..." class="rounded-bottom" alt="...">
<img src="..." class="rounded-start" alt="...">
<img src="..." class="rounded-circle" alt="...">
<img src="..." class="rounded-pill" alt="...">Sizes
Use the scaling classes for larger or smaller rounded corners. Sizes range from 0 to 3, and can be configured by modifying the utilities API.
<img src="..." class="rounded-0" alt="...">
<img src="..." class="rounded-1" alt="...">
<img src="..." class="rounded-2" alt="...">
<img src="..." class="rounded-3" alt="...">Sass
Variables
$border-width: 1px;
$border-widths: (
1: 1px,
2: 2px,
3: 3px,
4: 4px,
5: 5px
);
$border-color: $gray-300;
$border-radius: .25rem;
$border-radius-sm: .2rem;
$border-radius-lg: .3rem;
$border-radius-pill: 50rem;
Mixins
@mixin border-radius($radius: $border-radius, $fallback-border-radius: false) {
@if $enable-rounded {
border-radius: valid-radius($radius);
}
@else if $fallback-border-radius != false {
border-radius: $fallback-border-radius;
}
}
@mixin border-top-radius($radius: $border-radius) {
@if $enable-rounded {
border-top-left-radius: valid-radius($radius);
border-top-right-radius: valid-radius($radius);
}
}
@mixin border-end-radius($radius: $border-radius) {
@if $enable-rounded {
border-top-right-radius: valid-radius($radius);
border-bottom-right-radius: valid-radius($radius);
}
}
@mixin border-bottom-radius($radius: $border-radius) {
@if $enable-rounded {
border-bottom-right-radius: valid-radius($radius);
border-bottom-left-radius: valid-radius($radius);
}
}
@mixin border-start-radius($radius: $border-radius) {
@if $enable-rounded {
border-top-left-radius: valid-radius($radius);
border-bottom-left-radius: valid-radius($radius);
}
}
@mixin border-top-start-radius($radius: $border-radius) {
@if $enable-rounded {
border-top-left-radius: valid-radius($radius);
}
}
@mixin border-top-end-radius($radius: $border-radius) {
@if $enable-rounded {
border-top-right-radius: valid-radius($radius);
}
}
@mixin border-bottom-end-radius($radius: $border-radius) {
@if $enable-rounded {
border-bottom-right-radius: valid-radius($radius);
}
}
@mixin border-bottom-start-radius($radius: $border-radius) {
@if $enable-rounded {
border-bottom-left-radius: valid-radius($radius);
}
}
Utilities API
Border utilities are declared in our utilities API in scss/_utilities.scss. Learn how to use the utilities API.
"border": (
property: border,
values: (
null: $border-width solid $border-color,
0: 0,
)
),
"border-top": (
property: border-top,
values: (
null: $border-width solid $border-color,
0: 0,
)
),
"border-end": (
property: border-right,
class: border-end,
values: (
null: $border-width solid $border-color,
0: 0,
)
),
"border-bottom": (
property: border-bottom,
values: (
null: $border-width solid $border-color,
0: 0,
)
),
"border-start": (
property: border-left,
class: border-start,
values: (
null: $border-width solid $border-color,
0: 0,
)
),
"border-color": (
property: border-color,
class: border,
values: map-merge($theme-colors, ("white": $white))
),
"border-width": (
property: border-width,
class: border,
values: $border-widths
),
"rounded": (
property: border-radius,
class: rounded,
values: (
null: $border-radius,
0: 0,
1: $border-radius-sm,
2: $border-radius,
3: $border-radius-lg,
circle: 50%,
pill: $border-radius-pill
)
),
"rounded-top": (
property: border-top-left-radius border-top-right-radius,
class: rounded-top,
values: (null: $border-radius)
),
"rounded-end": (
property: border-top-right-radius border-bottom-right-radius,
class: rounded-end,
values: (null: $border-radius)
),
"rounded-bottom": (
property: border-bottom-right-radius border-bottom-left-radius,
class: rounded-bottom,
values: (null: $border-radius)
),
"rounded-start": (
property: border-bottom-left-radius border-top-left-radius,
class: rounded-start,
values: (null: $border-radius)
),