A collection of dynamically generated spacing utility classes.
Class names follow the Emmet abbreviation
syntax, with colons (':') replaced by two dashes (--
) to follow BEM naming
conventions.
Available classes
Where <amount>
can be either a unitless number representing a number of
typographic rhythm units as defined in
$jigsass-sizes
a percentage, or a length specified in pixels.
JigSass Spacing supports negative margins, using min-<number>
modifiers
(e.g., h-mt--min-4
), as well as auto margins (e.g., h-m--auto
).
Additionally, JigSass Spacing provide the autospace (.u-autospace
) set of helper classes
for intelligently spacing an element's direct descendants:
.u-autospace--<amount>
.u-autospace--<amount>(<n>up)
.u-autospace--<amount>
classes will give all but the first direct descendant of the element carrying the
class a margin-top
of <amount>
.
Similarly, .u-autospace--<amount>(<n>up)
classes will give all but the n
direct descendants of the
element carrying the class a margin-top
of <amount>
, allowing for intelligent spacing of
grid-like layouts.
For an in-depth presentation of the technique, see
this article by Heydon Pickering.
Installation
Using npm:
npm i -S jigsass-utils-spacing
Usage
Import JigSass Utils Spacing into your main scss file near its very end, together with all
other utilities (utilities should always be the last to be imported).
@import 'path/to/jigsass-utils-spacing/scss/index';
Like all other JigSass Utils, JigSass Spacing does not automatically generate any CSS
when imported. You would need to explicitly indicate that each individual spacing
class should actually be generated in each component or object it is used in
(clarification: This will include style declarations inside .foo
and .bar
):
// _c.foo.scss
.foo {
@include jigsass-util(u-mt, $modifier: 6px); // <-- margin-top: 6px
...
}
// _c.bar.scss
.bar {
@include jigsass-util(u-pb, $modifier: 12px); // <-- padding-bottom: 12px
@include jigsass-util(u-m, $modifier: 0, $from: large); // <-- margin: 0 from large bp and on.
...
}
Doing so helps us a great deal with portability, as no matter where we import component or object
partials, the correct utility classes will be generated. Think of it as a poor man's dependency
management.
Developer communication is also assisted by including "dependencies" wherever they are required,
as anyone going through a partial, can easily understand how it should be marked up with just a
glance.
As far as bloat goes, just don't worry about it - the actual styles will only be generated once,
at the location in the cascade where the Jigsass Spacing partial was imported into the main file.
JigSass Spacing classes are responsive-enabled, using JigSass MQ
and the breakpoints defined in the $jigsass-breakpoints variable.
Based on the breakpoint arguments passed to jigsass-util
when including a Spacing class,
responsive modifiers are generated according to the following logic:
.u-m--<modifier>[-[-from-<breakpoint-name>][-until-<breakpoint-name>][-misc-<breakpoint-name>]]
So, assuming the medium
, large
and landscape
breakpoints are defined in $jigsass-breakpoints
as 600px
, 1024px
and (orientation: landscape)
respectively,
@include jigsass-util(u-m, $modifier: 2);
will generate the .u-m--2
class, which is not limited to any media-query.
@include jigsass-util(u-p, $modifier: 4, $until: medium);
will generate the .u-p--4--until-medium
class, which will be in effect at
(max-width: 37.49em)
and will override styles in the default class until that point.
@include jigsass-util(u-mb, $modifier: 12px, $from: large, $misc: landscape);
will generate the .u-mb--12px--from-large-when-landscape
class, which will go into
effect at (min-width: 64em) and (orientation: landscape)
and will override styles in the default
class under these conditions.
License: MIT