Bootstrap includes a wide range of shorthand responsive margin and padding utility classes to modify an element's appearance.
<StyleSheet StyleSheet="Framework.bootstrap.bootstrap.css" /> <StyleSheet ShowModes="rdBrowser" StyleSheet="Framework.bootstrap.Overrides.css" /> <StyleSheet ShowModes="rdBrowser" StyleSheet="Fonts.combined.css" /> <StyleSheet ShowModes="rdBrowser" StyleSheet="Framework.css.Layout.css" /> <IncludeScriptFile ID="jquery" IncludedScriptFile="Framework.bootstrap.jquery.min.js" /> <IncludeScriptFile ID="bootstrap" IncludedScriptFile="Framework.bootstrap.bootstrap.js"> <Note Note="Includes Bootstrap.min.js, Popper.js or tether.js" /> </IncludeScriptFile>
Assign responsive-friendly margin or padding values to an element or a subset of its sides with shorthand classes. Includes support for individual properties, all properties, and vertical and horizontal properties. Classes are built from a default Sass map ranging from .25rem to 3rem.
margin
padding
.25rem
3rem
Spacing utilities that apply to all breakpoints, from xs to xl, have no breakpoint abbreviation in them. This is because those classes are applied from min-width: 0 and up, and thus are not bound by a media query. The remaining breakpoints, however, do include a breakpoint abbreviation.
xs
xl
min-width: 0
The classes are named using the format {property}{sides}-{size} for xs and {property}{sides}-{breakpoint}-{size} for sm, md, lg, and xl.
{property}{sides}-{size}
{property}{sides}-{breakpoint}-{size}
sm
md
lg
Where property is one of:
m
p
Where sides is one of:
t
margin-top
padding-top
b
margin-bottom
padding-bottom
l
margin-left
padding-left
r
margin-right
padding-right
x
*-left
*-right
y
*-top
*-bottom
Here are some representative examples of these classes:
.mt-0 { margin-top: 0 !important; } .ml-1 { margin-left: 0.25rem !important; } .px-2 { padding-left: .5rem !important; padding-right: .5rem !important; } .p-3 { padding: 1rem !important; }
Additionally, Bootstrap also includes an .mx-auto class for horizontally centering fixed-width block level content—that is, content that has display: block and a width set—by setting the horizontal margins to auto.
.mx-auto
display: block
width
auto