The aleutcss widths-responsive module is an extension of the default widths module.

    $ npm install --save-dev aleut.widths-responsive

widths-responsive loops through the breakpoints defined in settings.responsive to generate prefixed breakpoint-based classes. If you are using aleutcss’ default breakpoints, you will be given classes like u-1/4@lap-and-up.

<div class="o-layout">
   <div class="o-layout__item u-1/1 u-1/3@lap-and-up">
		Foo
   </div><!--
--><div class="o-layout__item u-1/1 u-2/3@lap-and-up">
		Bar
	</div>
</div>

By default we will create wholes, halves, thirds, quarters, and fifths. Override the $widths-columns-responsive-map if you want to change it:

$widths-columns-responsive: (
    1,
    2,
    3,
    4,
    5,
) !default;