Bootstrap 5 Utilities
Utilities / Helper Classes
Bootstrap 5 has a lot of utility/helper classes to quickly style elements without using any CSS code.
Borders
Use the border classes to add or remove borders from an element:
Example
<span class="border"></span>
<span class="border border-0"></span>
<span class="border border-top-0"></span>
<span class="border
border-end-0"></span>
<span class="border border-bottom-0"></span>
<span class="border border-start-0"></span>
<br>
<span
class="border-top"></span>
<span class="border-end"></span>
<span
class="border-bottom"></span>
<span class="border-start"></span>
Try it Yourself »Border Width
Use .border-1 to .border-5 to change the width of the border:
Example
<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>
Try it Yourself »Border Color
Add a color to the border with any of the contextual border color classes:
Example
<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>
Try it Yourself »Border Radius
Add rounded corners to an element with the rounded classes:
Example
<span class="rounded"></span>
<span class="rounded-top"></span>
<span class="rounded-end"></span>
<span class="rounded-bottom"></span>
<span class="rounded-start"></span>
<span
class="rounded-circle"></span>
<span class="rounded-pill"
style="width:130px"></span>
<span class="rounded-0"></span>
<span
class="rounded-1"></span>
<span class="rounded-2"></span>
<span
class="rounded-3"></span>
<span class="rounded-4"></span>
<span
class="rounded-5"></span>
Try it Yourself »Float and Clearfix
Float an element to the right with the .float-end class or to the left with .float-start, and clear floats with the .clearfix class:
Example
<div class="clearfix">
<span class="float-start">Float left</span>
<span
class="float-end">Float right</span>
</div>
Try it Yourself »Responsive Floats
Float an element to the left or to the right depending on screen width, with the responsive float classes (.float-*-start|end - where * is sm (>=576px), md (>=768px), lg (>=992px), xl (>=1200px) or xxl (>=1400px)):
Example
<div class="float-sm-end">Float right on small screens or wider</div><br>
<div class="float-md-end">Float right on medium screens or wider</div><br>
<div class="float-lg-end">Float right on large screens or wider</div><br>
<div class="float-xl-end">Float right on extra large screens or
wider</div><br>
<div class="float-xxl-end">Float right on
XXL screens or
wider</div><br>
<div class="float-none">Float none</div>
Try it Yourself »Center Align
Center an element with the .mx-auto class (adds margin-left and margin-right: auto):
Example
<div class="mx-auto
bg-warning" style="width:150px">Centered</div>
Try it Yourself »Width
Set the width of an element with the w-* classes (.w-25, .w-50, .w-75, .w-100, .mw-auto, .mw-100):
Example
<div class="w-25 bg-warning">Width 25%</div>
<div class="w-50 bg-warning">Width
50%</div>
<div class="w-75 bg-warning">Width 75%</div>
<div
class="w-100 bg-warning">Width 100%</div>
<div
class="w-auto bg-warning">Auto Width</div>
<div class="mw-100 bg-warning">Max Width 100%</div>
Try it Yourself »Height
Set the height of an element with the h-* classes (.h-25, .h-50, .h-75, .h-100, .mh-auto, .mh-100):
Example
<div style="height:200px;background-color:#ddd">
<div class="h-25 bg-warning">Height 25%</div>
<div class="h-50 bg-warning">Height
50%</div>
<div class="h-75 bg-warning">Height 75%</div>
<div
class="h-100 bg-warning">Height 100%</div>
<div class="h-auto bg-warning">Auto Height</div>
<div class="mh-100 bg-warning"
style="height:500px">Max Height 100%</div>
</div>
Try it Yourself »Spacing
Bootstrap 5 has a wide range of responsive margin and padding utility classes.
They work for all breakpoints: xs (<=576px), sm (>=576px), md (>=768px), lg (>=992px), xl (>=1200px) or xxl (>=1400px)):
The classes are used in the format: {property}{sides}-{size} for xs and {property}{sides}-{breakpoint}-{size} for sm, md, lg, xl and xxl.
Where property is one of:
m- setsmarginp- setspadding
Where sides is one of:
t- setsmargin-toporpadding-topb- setsmargin-bottomorpadding-bottoms- setsmargin-leftorpadding-lefte- setsmargin-rightorpadding-rightx- sets bothpadding-leftandpadding-rightormargin-leftandmargin-righty- sets bothpadding-topandpadding-bottomormargin-topandmargin-bottom- blank - sets a
marginorpaddingon all 4 sides of the element
Where size is one of:
0- setsmarginorpaddingto01- setsmarginorpaddingto.25rem2- setsmarginorpaddingto.5rem3- setsmarginorpaddingto1rem4- setsmarginorpaddingto1.5rem5- setsmarginorpaddingto3remauto- setsmarginto auto
Example
<div class="pt-4 bg-warning">I only have a top padding (1.5rem)</div>
<div class="p-5 bg-success">I have a padding on all sides
(3rem)</div>
<div class="m-5 pb-5 bg-info">I have a margin on
all sides (3rem) and a bottom padding (3rem)</div>
Try it Yourself »More Spacing Examples
.m-# / m-*-# |
margin on all sides | Try it |
.mt-# / mt-*-# |
margin top | Try it |
.mb-# / mb-*-# |
margin bottom | Try it |
.ms-# / ms-*-# |
margin left | Try it |
.me-# / me-*-# |
margin right | Try it |
.mx-# / mx-*-# |
margin left and right | Try it |
.my-# / my-*-# |
margin top and bottom | Try it |
.p-# / p-*-# |
padding on all sides | Try it |
.pt-# / pt-*-# |
padding top | Try it |
.pb-# / pb-*-# |
padding bottom | Try it |
.ps-# / ps-*-# |
padding left | Try it |
.pe-# / pe-*-# |
padding right | Try it |
.py-# / py-*-# |
padding top and bottom | Try it |
.px-# / px-*-# |
padding left and right | Try it |
You can read more about rem and different size units in our CSS Units Reference.
Shadows
Use the shadow- classes to add shadows to an element:
Example
<div class="shadow-none p-4 mb-4 bg-light">No shadow</div>
<div
class="shadow-sm p-4 mb-4 bg-white">Small
shadow</div>
<div class="shadow p-4 mb-4 bg-white">Default
shadow</div>
<div class="shadow-lg p-4 mb-4 bg-white">Large
shadow</div>
Try it Yourself »Vertical Align
Use the align- classes to change the alignment of elements (only works on inline, inline-block, inline-table and table cell elements):
Example
<span class="align-baseline">baseline</span>
<span
class="align-top">top</span>
<span class="align-middle">middle</span>
<span class="align-bottom">bottom</span>
<span
class="align-text-top">text-top</span>
<span
class="align-text-bottom">text-bottom</span>
Try it Yourself »Aspect Ratio
Create responsive video or slideshows based on the width of the parent.
Add the .ratio class together with an aspect
ratio of your choice .ratio-* to a
parent element, and add the embed (video or iframe) inside of it:
Example
<!-- Aspect ratio 1:1 -->
<div class="ratio ratio-1x1">
<iframe src="https://www.youtube.com/embed/tgbNymZ7vqY"></iframe>
</div>
<!-- Aspect ratio 4:3 -->
<div class="ratio ratio-4x3">
<iframe src="https://www.youtube.com/embed/tgbNymZ7vqY"></iframe>
</div>
<!-- Aspect ratio 16:9 -->
<div class="ratio
ratio-16x9">
<iframe
src="https://www.youtube.com/embed/tgbNymZ7vqY"></iframe>
</div>
<!-- Aspect ratio 21:9 -->
<div class="ratio ratio-21x9">
<iframe src="https://www.youtube.com/embed/tgbNymZ7vqY"></iframe>
</div>
Try it Yourself »Visibility
Use the .visible or .invisible classes to control the visibility of elements. Note: These classes do not change the CSS display value. They only add visibility:visible or visibility:hidden:
Example
<div class="visible">I am visible</div>
<div class="invisible">I am
invisible</div>
Try it Yourself »Close icon
Use the .btn-close class to style a close
icon. This is often used for alerts and modals.
Screenreaders
Use the .visually-hidden class to hide an element on all devices, except screen readers:
Example
<span class="visually-hidden">I will be hidden on all screens except for screen
readers.</span>
Try it Yourself »
Colors
As described in the Colors chapter, here is a list of all text and background color classes:
The classes for text colors are: .text-muted,
.text-primary, .text-success, .text-info,
.text-warning, .text-danger, .text-secondary, .text-white,
.text-dark, .text-body (default body color/often black) and .text-light:
Example
This text is muted.
This text is important.
This text indicates success.
This text represents some information.
This text represents a warning.
This text represents danger.
Secondary text.
Dark grey text.
Body text.
Light grey text.
Contextual text classes can also be used on links:
Example
You can also add 50% opacity for black or white text with the .text-black-50 or .text-white-50 classes:
Example
Black text with 50% opacity on white background
White text with 50% opacity on black background
Background Colors
The classes for background colors are: .bg-primary,
.bg-success, .bg-info, .bg-warning, .bg-danger, .bg-secondary, .bg-dark and .bg-light.
The .bg-color classes above does not work well with text, or atleast then you
have to specify a proper .text-color class to get the right text color for each
background.
However, you can use the
.text-bg-color classes and Bootstrap will automatically handle the appropriate
text color for each background color:
Example
This text is important.
This text indicates success.
This text represents some information.
This text represents a warning.
This text represents danger.
Secondary background color.
Dark grey background color.
Light grey background color.