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Spartan Grid Documentation

Basic Usage

All about the basic usage of Spartan is documented in the project readme.

Advanced Usage

Grid Creation API

You would normally just use grid-bundle() to set up a grid, but you can also use the following mixins to generate even more flexible grids, see Viewport Dependent Configurations and Custom Classes for use cases.

grid-core([$namespace: 'g'])

This will define the core variables and mixins and generate selectors and styles needed for any grid setup, i.e. clearing on the container, floating of cells etc. Generally has to be called only once for any grid setup.

Note that the namespace can also be set with grid-unlock but once it's set/overwritten through this mixin, it can only be overwritten again with this mixin. Read about namespacing

Generates styles for:

  • .g-container
  • .g-cell

grid-unlock(<$config>)

Pass in your grid configuration like with grid-bundle(). This will unlock all configuration sensitive mixins like grid-span(), grid-offset() etc.

@include grid-unlock($config);
	
.custom-cell {
    @include grid-span(5);
}

Params

Param Type Value Comment
$width number px, em or %
$gutter number px, em or %
$cells number integer
$namespace string optional, defaults to 'g'
grid-config-set($setting)

You can adjust specific settings with this mixin like so:

@include grid-unlock(100%, 20px, 12);

// change the gutter in configuration, no CSS generated yet
@include grid-config-set('gutter', 5%);

grid-gutter([$arg1: $config-gutter], [$arg2: null])

Generate only gutter styles. Especially useful if you have a grid setup where the gutter changes in different sections, so you don't have to generate all classes anew.

Generates Styles for

  • .g-container
  • .g-container > .g-cell

Checkout the changing gutters example.

You can call grid-gutter() with either a fix value which will be taken as is or provide a relation to which a percentage value will be calculated.

If you omit the parameter it simply relies on your unlocked configuration.

Fixed values

@include grid-gutter(20px);

@include grid-gutter(1.5em);

@include grid-gutter(3%);

Relational percentage value

@include grid-gutter(940px, 20px);

@include grid-gutter(60em, 1.5em);

grid-generate([$prefix: ''], [$cells: $config-cells])

This mixin will generate all configuration sensitive classes like .g-span-{xx}, .g-offset-{xx} etc.

Read about prefixing

Generates

  • .g-span-xx
  • .g-offset-xx
  • .g-push-xx
  • .g-pull-xx

If you pass an optional cell amount, it will use this value for generation while relying on your unlocked configuration.

So if you know you'll never use classes for more than half the grid width you can reduce output css by only generating those classes:

@include grid-unlock(100%, 20px, 12);
@include grid-generate($cells: 6);

If you don't pass a prefix as the first parameter you have to name the parameter.

Viewport Dependent Configurations

You can use grid-config-set() or even grid-unlock() inside media queries to generate styles for different viewports like so:

// generate base grid styles
@include grid-core();

// grid setup for mobile first small screen
@include grid-unlock(100%, 5px, 12);
@include grid-gutter();
@include grid-generate();

@media (min-width: 40.0625em) {
	// increase the gutter for medium screen
	@include grid-config-set('gutter', 15px);
	@include grid-gutter();
}

@media (min-width: 65.0625em) {
	// different grid setup for large screen
	@include grid-unlock(940px, percentage(30px / 940px), 12);
	@include grid-gutter();
	@include grid-generate();
}

Custom Classes

Namespace

grid-bundle() as well as grid-core() and grid-unlock() take an optional parameter namespace (defaults to 'g') with which you can customize the generated classes.

Example output with @include grid-bundle($namespace: 'grid'):

.grid-container
.grid-cell
.grid-span
.grid-offset
// etc...

You can also remove the namespace by passing an empty string ('') instead.

Additional Prefix

You can further customize the generated classes through an optional parameter to grid-generate() (defaults to an empty string ''). See it as an addition to the namespace which counts for all generated classes while this one only adjusts the configuration sensitive classes. Lets assume the following setup:

@include grid-core('grid');
@include grid-unlock($some-grid-config);
@include grid-generate('test');

This will generate the base classes as mentioned in the namespace section above:

.grid-container
.grid-cell

But the other classes will look like this:

.grid-test-span
.grid-test-offset
// etc...

Check out the "Bootstrap" responsive approach too see how this can be of use.

Semantic Grid

Spartan comes with two mixins for applying grid styles to any selector:

  • grid-container([$gutter: $config-gutter])
  • grid-cell([$gutter: $config-gutter])

As you could imagine grid-container() applies all container styles to your selector and grid-cell() does so for cell styles.

You can optionally overwrite the gutter from your previously unlocked settings, but make sure both mixins use the same value.

@include grid-unlock(100%, 20px, 12);

// 20px gutter from default config will be overwritten by mixins
main {
	@include grid-container(5%);
	
	@media (min-width: 40em) {
		@include grid-container(30px);
	}
	
	article,
	aside {
		@include grid-cell(5%);
	
		@media (min-width: 40em) {
			@include grid-cell(30px);
		}
	}
	
	article {
		@include grid-span(8);
	}
	
	aside {
		@include grid-span(4);
	}
}

You cannot use the mixin grid-gutter() to adjust gutters for responsive layouts since this generates the default grid classes.

Responsive Approaches

The "Spartan Way"

Our recommended way to implement most responsive grids in your project is to create reusable layouts, it reduces output CSS to only what is actually needed.

There are two mixins which will help you create responsive layouts:

@include grid-cell-set(<$cell-name>, <$cell-span>, [$offset: 0], [$reorder: 0]);
@include grid-cell-set-equal(<$cell-span>, [$vertical-spacing: false], [$spacing-direction: 'between']);

If your project only consists of layouts and you never use classes like .grid-span-{xx} you don't even have to use grid-generate() in your setup.

grid-cell-set

Generate a class .#{$config-namespace}#{$cell-name} as direct child of .g-container. Note that $offset and $reorder are optional parameters and can be omitted if not used.

We use direct child selectors so different responsive layouts cannot interfere with each other.

Parameters

Param Type Value Comment
$cell-name string example: 'cell-1' quotes optional
$cells number only positive as you would define with grid-span()
$offset number positive or negative optional, uses grid-offset() to apply indents
$reorder number positive or negative optional, uses grid-reorder() to reposition a cell

This mixin is used to define different cells inside a layout, so if one cell takes 2/3 of the grid and the other 1/3 you'd use the mixin twice like this:

.g-layout-1 {
	// max cells: 12
	@include grid-cell-set('cell-1', 8);
	@include grid-cell-set('cell-2', 4);
}

... which will enable you to use .g-cell-1 and .g-cell-2 as classes:

<div class="g-container g-layout-1">
	<div class="g-cell g-cell-1"></div>
	<div class="g-cell g-cell-2"></div>
</div>

You can name your layout(s) whatever you like, g-layout-1 just serves as an example.

grid-cell-set-equal

Generate a direct child selector .g-cell with the given width, vertically align items to each other and add an optional vertical spacing.

Params

Param Type Value Comment
$cells number only positive
$spacing number px, em or % optional, add a vertical spacing on rows of cells
$direction string defaults to 'between' optional, the spacing direction ('between', 'before', 'after')

Spacing 'between' for example means that there is space between every grid "row", i.e. when cells float down to a new line because there is no more room for them.

Responsive Layout Example

.g-layout-1 {
	// grid maximum cells: 12

	// one full-width cell in small screen -> no declaration needed

	@media (min-width: 40.0625em) {
		// two half-width cells in medium screen
		@include grid-cell-set-equal(6); // 12 / 2 = 6
	}

	@media (min-width: 65.0625em) {
		// three even cells in large screen
		@include grid-cell-set-equal(4); // 12 / 3 = 4
	}
}

Keep in mind that you don't need to grid-generate() all the usual grid styles if you're only using layouts throughout your project.

With a mobile first approach you either have to declare a media query or omit the definition because of possible interfering pseudo selectors (:nth-of-type).

The "Bootstrap Way"

The highly flexible creation API enables you to generate predefined classes for every viewport you have and set up fully responsive layouts in the markup directly.

If you prefer or have to be able to use a bootstrap grid like system with viewport specific classes in your markup you can use the following technique, simply make use of the optional parameter to grid-generate():

@include grid-core(''); // base classes, remove namespace if preferred
@include grid-unlock(100%, 20px, 12);
@include grid-gutter(); // define gutter once

// generate mobile first, small screen classes
@include grid-generate('sm');

// generate medium screen classes
@media (min-width: 40.0625em) {
	@include grid-generate('md');
}

// generate large screen classes
@media (min-width: 65.0625em) {
	@include grid-generate('lg');
}

Now you can use these classes in your markup and the cells will change accordingly throughout viewports.

<div class="container">
	<div class="cell sm-span-6 md-span-4 lg-span-3"></div>
	<div class="cell sm-span-6 md-span-4 lg-span-3"></div>
	<div class="cell sm-span-6 md-span-4 lg-span-3"></div>
	<div class="cell sm-span-6 md-span-4 lg-span-3"></div>
</div>