css-utils-margin

Immutable, CSS margin utilities.

Naming Convention

Due to the ubiquitous nature of setting margin, these utilities use a shorthand naming convention.

Shorthand	Description
m	Margin
t	Top
r	Right
b	Bottom
l	Left
x	XAxis (left and right)
y	YAxis (top and bottom)
n	Negative
0	0 reset
1	--space-1 (default 0.5rem)
2	--space-2 (default 1rem)
3	--space-3 (default 2rem)
4	--space-4 (default 4rem)

Change or reset default margins using the white space scale. Negative u-xAxis margins are used to offset margins and padding of child elements. Margin auto is used to horizontally center block-level elements with a set width.

.u-m0  { margin:        0 }
.u-mt0 { margin-top:    0 }
.u-mr0 { margin-right:  0 }
.u-mb0 { margin-bottom: 0 }
.u-ml0 { margin-left:   0 }
.u-mx0 { margin-left:   0; margin-right:  0 }
.u-my0 { margin-top:    0; margin-bottom: 0 }

.u-m1  { margin:        var(--space-1) }
.u-mt1 { margin-top:    var(--space-1) }
.u-mr1 { margin-right:  var(--space-1) }
.u-mb1 { margin-bottom: var(--space-1) }
.u-ml1 { margin-left:   var(--space-1) }
.u-mx1 { margin-left:   var(--space-1); margin-right:  var(--space-1) }
.u-my1 { margin-top:    var(--space-1); margin-bottom: var(--space-1) }

.u-m2  { margin:        var(--space-2) }
.u-mt2 { margin-top:    var(--space-2) }
.u-mr2 { margin-right:  var(--space-2) }
.u-mb2 { margin-bottom: var(--space-2) }
.u-ml2 { margin-left:   var(--space-2) }
.u-mx2 { margin-left:   var(--space-2); margin-right:  var(--space-2) }
.u-my2 { margin-top:    var(--space-2); margin-bottom: var(--space-2) }

.u-m3  { margin:        var(--space-3) }
.u-mt3 { margin-top:    var(--space-3) }
.u-mr3 { margin-right:  var(--space-3) }
.u-mb3 { margin-bottom: var(--space-3) }
.u-ml3 { margin-left:   var(--space-3) }
.u-mx3 { margin-left:   var(--space-3); margin-right:  var(--space-3) }
.u-my3 { margin-top:    var(--space-3); margin-bottom: var(--space-3) }

.u-m4  { margin:        var(--space-4) }
.u-mt4 { margin-top:    var(--space-4) }
.u-mr4 { margin-right:  var(--space-4) }
.u-mb4 { margin-bottom: var(--space-4) }
.u-ml4 { margin-left:   var(--space-4) }
.u-mx4 { margin-left:   var(--space-4); margin-right:  var(--space-4) }
.u-my4 { margin-top:    var(--space-4); margin-bottom: var(--space-4) }

.u-mxn1 { margin-left: -var(--space-1); margin-right: -var(--space-1); }
.u-mxn2 { margin-left: -var(--space-2); margin-right: -var(--space-2); }
.u-mxn3 { margin-left: -var(--space-3); margin-right: -var(--space-3); }
.u-mxn4 { margin-left: -var(--space-4); margin-right: -var(--space-4); }

.u-mlAuto { margin-left: auto }
.u-mrAuto { margin-right: auto }
.u-mxAuto { margin-left: auto; margin-right: auto; }

Resetting Margins

To increase information density and to better align elements, remove default margins from typographic elements using the margin utilities.

<h1 class="u-m0">No margin</h1>
<h1 class="u-mt0">No margin top</h1>
<h1 class="u-mb0">No margin bottom</h1>

Add Spacing

Add spacing around elements using a combination of margin utilities.

<div class="u-mxn1">
  <div class="u-m1">Hamburger</div>
  <div class="u-m1">Hamburger</div>
  <div class="u-m1">Hamburger</div>
</div>

The negative margin utilities also work with padded children.

<div class="border">
  <div class="u-mxn2">
    <div class="u-px2 border">Padded div</div>
  </div>
</div>

Center Elements

Block elements with a set width can be centered with .u-mxAuto.

<img src="http://d2v52k3cl9vedd.cloudfront.net/assets/images/placeholder-square.svg"
  width="96"
  height="96"
  class="block u-mxAuto" />

Credits

This utility is heavily inspired by Basscss and SuitCSS. This repository is merely a combining of great principles championed by each.