Responsive CSS Flexbox Masonry Grid Framework

The Responsive CSS Flexbox Grid is simple, robust, flexible and built with Sass.
Fully responsive for desktop, tablet and mobile viewports. Featuring basic grid, sidebar, alignment, nesting and many more.

What is Flexbox

Flexbox is a new layout mode in CSS3

The CSS3 Flexible Box, or flexbox, is a layout mode intended to accommodate different screen sizes and different display devices. For many applications, the flexible box model is easier than the block model since it does not use floats, nor do the flex container’s margins collapse with the margins of its contents.

Many designers find the flexboxes easier to use than boxes. Without a lot of work, div’s frequently rose to the top of a page when designers did not want them to – so for example, sticking a footer to the bottom of a page was difficult. The widths and heights of flexboxes vary to adapt to the display space, holding the lower down elements in place. Flexbox logic also asks whether you want div’s to accrue to the right or on the bottom. The display order of flexbox elements is independent of their order in the source code.

Popular layouts can thus be achieved more simply and with cleaner code. This independence intentionally affects only the visual rendering, leaving speech order and navigation based on a linear reading of the HTML source.

Flexbox Grid isResponsiveFlexibleand very simple

It’s about time. We can vertically and horizontally center anything without CSS transform hacks! Flexbox Grid keeps to twelve columns (selectable) and used breakpoints for the responsive layouts (extra small, small, medium, large and extra large) that we come to expect.

Based on Flexbox (CSS Flexible Box Layout Module), the Flexbox Grid System is a very simple css grid to quickly create modern layouts.

Endless Layout Possibilities

Flexbox Grid comes with 3 grid layouts and 2 modes (vertical/horizontal) alignments. Possibilities are endless with a grid system which can handle up to 12 columns.

How it works

Our grid system uses a series of containers, rows, and columns to layout and align content. It’s built with flexbox and is fully responsive. Below is examples and an in-depth look at how the grid works.

Containers

Container are the most basic layout element and are required our grid system. Choose from a responsive, fixed-width container or fluid-width.

Fixed-width container

fixed-width container

<div class="container">
    ...
</div>

Fluid-width container

fluid-width container

<div class="container-fluid">
    ...
</div>

Basic

The grid cells below do not specify any widths, they just naturally space themselves equally and expand to fit the entire row. They’re also equal height by default.

<div class="container">
	<div class="row">
		<div class="col-1">...</div>
	</div>
	<div class="row">
		<div class="col-2">...</div>
	</div>
	<div class="row">
		<div class="col-3">...</div>
	</div>
	<div class="row">
		<div class="col-4">...</div>
	</div>
	<div class="row">
		<div class="col-5">...</div>
	</div>
	<div class="row">
		<div class="col-6">...</div>
	</div>
	<div class="row">
		<div class="col-7">...</div>
	</div>
	<div class="row">
		<div class="col-8">...</div>
	</div>
	<div class="row">
		<div class="col-9">...</div>
	</div>
	<div class="row">
		<div class="col-10">...</div>
	</div>
	<div class="row">
		<div class="col-11">...</div>
	</div>
	<div class="row">
		<div class="col-12">...</div>
	</div>
</div>

Auto-Layout

Use breakpoint-specific column classes for equal-width columns. Add any number of a column classes for each breakpoint you need and every column will be the same width.

Equal-width

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<div class="container">
	<div class="row">
		<div class="col">...</div>
		<div class="col">...</div>
	</div>
	<div class="row">
		<div class="col">...</div>
		<div class="col">...</div>
		<div class="col">...</div>
	</div>
	<div class="row">
		<div class="col">...</div>
		<div class="col">...</div>
		<div class="col">...</div>
		<div class="col">...</div>
		<div class="col">...</div>
	</div>
</div>

One column width

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<div class="container">
	<div class="row">
		<div class="col">...</div>
		<div class="col-5">...</div>
		<div class="col">...</div>
	</div>
	<div class="row">
		<div class="col">...</div>
		<div class="col-7">...</div>
		<div class="col">...</div>
	</div>
	<div class="row">
		<div class="col">...</div>
		<div class="col-3">...</div>
		<div class="col">...</div>
		<div class="col-2">...</div>
	</div>
</div>

Variable with content

Variable width content

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Variable width content

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Variable width content

<div class="container">
	<div class="row justify-content-md-center">
		<div class="col-12 col-md-auto">...</div>
		<div class="col col-lg-3">...</div>
		<div class="col col-lg-2">...</div>
	</div>
	<div class="row">
		<div class="col">...</div>
		<div class="col-12 col-md-auto">...</div>
		<div class="col col-lg-3">...</div>
	</div>
	<div class="row">
		<div class="col">...</div>
		<div class="col">...</div>
		<div class="col col-md-auto">...</div>
	</div>
</div>

Alignment

Use flexbox alignment utilities to vertically and horizontally align columns.

Vertical alignment

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<div class="container">
	<div class="row align-items-start">
		<div class="col">...</div>
		<div class="col">...</div>
		<div class="col">...</div>
	</div>
	<div class="row align-items-center">
		<div class="col">...</div>
		<div class="col">...</div>
		<div class="col">...</div>
	</div>
	<div class="row align-items-end">
		<div class="col">...</div>
		<div class="col">...</div>
		<div class="col">...</div>
	</div>
	<div class="row">
		<div class="col align-self-start">...</div>
		<div class="col align-self-center">...</div>
		<div class="col align-self-end">...</div>
	</div>
</div>

Horizontal alignment

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<div class="container">
	<div class="row justify-content-start">
		<div class="col-4">...</div>
		<div class="col-4">...</div>
	</div>
	<div class="row justify-content-center">
		<div class="col-4">...</div>
		<div class="col-4">...</div>
	</div>
	<div class="row justify-content-end">
		<div class="col-4">...</div>
		<div class="col-4">...</div>
	</div>
</div>

Around

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<div class="container">
	<div class="row justify-content-around">
		<div class="col-4">...</div>
		<div class="col-4">...</div>
	</div>
	<div class="row justify-content-around">
		<div class="col-3">...</div>
		<div class="col-3">...</div>
	</div>
	<div class="row justify-content-around">
		<div class="col-5">...</div>
		<div class="col-5">...</div>
	</div>
</div>

Between

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<div class="container">
	<div class="row justify-content-between">
		<div class="col-4">...</div>
		<div class="col-4">...</div>
	</div>
	<div class="row justify-content-between">
		<div class="col-3">...</div>
		<div class="col-3">...</div>
	</div>
	<div class="row justify-content-between">
		<div class="col-5">...</div>
		<div class="col-5">...</div>
	</div>
</div>

Nesting

To nest the content with the grid, add a new .row and set of .col-sm-* columns within an existing .col-* column. Nested rows should include a set of columns that add up to 12 or fewer (it is not required that all 12 available columns).

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<div class="container">
	<div class="row">
		<div class="col-sm-9">
			...
			<div class="row">
				<div class="col-8 col-sm-6">...</div>
				<div class="col-4 col-sm-6">...</div>
			</div>
		</div>
	</div>
</div>

Reordering

Flex order

Use flexbox utilities for controlling the visual order of the content.

First, but unordered

Second, but last

Third, but first

<div class="container">
	<div class="row">
		<div class="col flex-unordered">...</div>
		<div class="col flex-last">...</div>
		<div class="col flex-first">...</div>
	</div>
</div>

Offsetting columns

Move columns to the right using .offset-md-* classes. These classes increase the left margin of a column by * columns. For example, .offset-md-4 moves .col-md-4 over four columns.

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<div class="container">
	<div class="row">
		<div class="col-md-4">...</div>
		<div class="col-md-4 offset-md-4">...</div>
	</div>
	<div class="row">
		<div class="col-md-3 offset-md-3">...</div>
		<div class="col-md-3 offset-md-3">...</div>
	</div>
	<div class="row">
		<div class="col-md-6 offset-md-3">...</div>
	</div>
</div>

Simple – Flexible – Responsive

Responsive

Breakpoints

The Grid uses breakpoints in source files for a default layout and the media queries are available as Sass mixins.

// Small devices (landscape phones, 576px and up)
@media (min-width: 576px) { ... }

// Medium devices (tablets, 768px and up)
@media (min-width: 768px) { ... }

// Large devices (desktops, 992px and up)
@media (min-width: 992px) { ... }

// Extra large devices (large desktops, 1200px and up)
@media (min-width: 1200px) { ... }

@include breakpoint-up(xs) { ... }
@include breakpoint-up(sm) { ... }
@include breakpoint-up(md) { ... }
@include breakpoint-up(lg) { ... }
@include breakpoint-up(xl) { ... }

Use media queries that go in the other direction.

// Extra small devices (portrait phones, less than 576px)
@media (max-width: 575px) { ... }

// Small devices (landscape phones, less than 768px)
@media (max-width: 767px) { ... }

// Medium devices (tablets, less than 992px)
@media (max-width: 991px) { ... }

// Large devices (desktops, less than 1200px)
@media (max-width: 1199px) { ... }

@include breakpoint-down(xs) { ... }
@include breakpoint-down(sm) { ... }
@include breakpoint-down(md) { ... }
@include breakpoint-down(lg) { ... }
@include breakpoint-down(xl) { ... }

Minimum and maximum breakpoint widths.

// Extra small devices (portrait phones, less than 576px)
@media (max-width: 575px) { ... }

// Small devices (landscape phones, 576px and up)
@media (min-width: 576px) and (max-width: 767px) { ... }

// Medium devices (tablets, 768px and up)
@media (min-width: 768px) and (max-width: 991px) { ... }

// Large devices (desktops, 992px and up)
@media (min-width: 992px) and (max-width: 1199px) { ... }

// Extra large devices (large desktops, 1200px and up)
@media (min-width: 1200px) { ... }

@include breakpoint-range(xs) { ... }
@include breakpoint-range(sm) { ... }
@include breakpoint-range(md) { ... }
@include breakpoint-range(lg) { ... }
@include breakpoint-range(xl) { ... }

Responsive modifiers enable specifying different column sizes, offset, alignment and distribution at sm, md, lg and xl viewport widths.

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<div class="container">
	<div class="row">
		<div class="col">...</div>
		<div class="col">...</div>
		<div class="col">...</div>
		<div class="col">...</div>
	</div>
	<div class="row">
		<div class="col-8">...</div>
		<div class="col-4">...</div>
	</div>
	<div class="row">
		<div class="col-3">...</div>
		<div class="col-5">...</div>
		<div class="col-4">...</div>
	</div>
</div>

Stacked to horizontal

Using .col-sm-* classes, you can create a basic grid system that starts out stacked on extra small devices before becoming horizontal on desktop devices.

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<div class="container">
	<div class="row">
		<div class="col-sm-8">...</div>
		<div class="col-sm-4">...</div>
	</div>
	<div class="row">
		<div class="col-sm">...</div>
		<div class="col-sm">...</div>
		<div class="col-sm">...</div>
	</div>
	<div class="row">
		<div class="col-sm">...</div>
		<div class="col-sm">...</div>
		<div class="col-sm">...</div>
		<div class="col-sm">...</div>
	</div>
</div>

Mix and match

Don’t you want the columns to stack in grid tiers? Using a combination of different classes for each tier as needed.

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<div class="container">
	<div class="row">
		<div class="col-4">...</div>
		<div class="col-8">...</div>
	</div>
	<div class="row">
		<div class="col col-md-3">...</div>
		<div class="col-6 col-md-9">...</div>
	</div>
	<div class="row">
		<div class="col-6 col-md-4">...</div>
		<div class="col-6 col-md-4">...</div>
		<div class="col-6 col-md-4">...</div>
	</div>
</div>

Customize

You can just use the mixins with their default values. Here is an example of using the default settings to create a two-column layout.

...

.container {
	max-width: 72em;
	@include create-container();
}
.row {
	@include create-row();
}
.main-content {
	@include create-col-ready();
	@media (max-width: 40em) {
    	@include create-col(6);
	}
	@media (min-width: 40.1em) {
    	@include create-col(9);
	}
}
.sidebar {
	@include create-col-ready();
	@media (max-width: 40em) {
    	@include create-col(6);
	}
	@media (min-width: 40.1em) {
    	@include create-col(3);
	}
}

Display property

Quickly and responsively toggle the display value of components.

Display utility classes 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.

As such, the classes are named using the format:

.d-{value} for xs
.d-{breakpoint}-{value} for sm, md, lg and xl

Where value is one of:

none
inline
inline-block
block table
table-cell
table-row
flex
inline-flex

The media queries effect screen widths with the given breakpoint or larger. For example, .d-lg-none sets display: none; on both lg and xl screens.

d-inline

<div class="d-inline">d-inline</div>
<div class="d-inline">d-inline</div>

d-block d-block

<span class="d-block">d-block</span>
<span class="d-block">d-block</span>

Hiding elements

To hide elements simply use the .d-none class or one of the .d-{sm,md,lg,xl}-none classes.

To show an element only on a given interval of screen sizes you can combine one .d-*-none class with a .d-*-* class, for example .d-none .d-md-block .d-xl-none will hide the element for all screen sizes except on medium and large devices.

Screen size	Class
Hidden on all	.d-none
Hidden only on xs	.d-none .d-sm-block
Hidden only on sm	.d-sm-none .d-md-block
Hidden only on md	.d-md-none .d-lg-block
Hidden only on lg	.d-lg-none .d-xl-block
Hidden only on xl	.d-xl-none
Visible on all	.d-block
Visible only on xs	.d-block .d-sm-none
Visible only on sm	.d-none .d-sm-block .d-md-none
Visible only on md	.d-none .d-md-block .d-lg-none
Visible only on lg	.d-none .d-lg-block .d-xl-none
Visible only on xl	.d-none .d-xl-block

Hide on screens wider than lg

Hide on screens smaller than lg

<div class="d-lg-none">Hide on screens wider than lg</div>
<div class="d-none d-lg-block">Hide on screens smaller than lg</div>

A FANCY MODERN GRID SYSTEM

All these things are possible outside flexbox, but typically require extra hacks and workarounds to do right. Use Flexbox Grid to take full advantage of css flexible box module for even more control over your sites layout, alignment and distribution of content.

Why Flexbox Grid

- - It’s lightweight – 17KB as minified css file
  - Where flexbox is supported, columns are all the same height by default
  - Flexbox grid cells never push each other out of the way, as with floated grids
  - Support nested grids
  - Masonry layout
  - Masonry image gallery
  - Excellent cross browser support
  - Easily customizable and extensible
  - Built with SASS/SCSS

Responsive CSS Flexbox Masonry Grid Framework