Bootstrap 4 Flex Grid

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Bootstrap 4 makes it even more easy by offering a set of ready made CSS classes for applying Flexbox layout to elements. In the following tutorial we’ll take a deeper look the Bootstrap 4 CSS. Nov 16, 2018 To refresh your memory regarding Bootstrap 4 flex utilities, you can check out Day 3: Bootstrap 4 Flex Tutorial and Examples. You have two options to add a header to a Bootstrap 4 card. In order to see all that the grid has to offer, please go back to the Bootstrap 4 grid tutorial.

Fancy a more modern grid system? Enable flexbox support in Bootstrap to take full advantage of CSS’s Flexible Box module for even more control over your site’s layout, alignment, and distribution of content.

Bootstrap’s flexbox grid includes support for every feature from our default grid system, and then some. Please read the default grid system docs before proceeding through this page. Features that are covered there are only summarized here. Please note that Internet Explorer 9 does not support flexbox, so proceed with caution when enabling it.

Heads up! This flexbox grid documentation is powered by an additional CSS file that overrides our default grid system’s CSS. This is only available in our hosted docs and is disabled in development.

Contents

How it works

The flexbox grid system behaves similar to our default grid system, but with a few notable differences:

  • Grid mixins and predefined classes include support for flexbox. Just enable flexbox support to utilize them as you would otherwise.
  • Nesting, offsets, pushes, and pulls are all supported in the flexbox grid system.
  • Flexbox grid columns without a set width will automatically layout with equal widths. For example, four columns will each automatically be 25% wide.
  • Flexbox grid columns have significantly more alignment options available, including vertical alignment.
  • Unlike the default grid system where a grid column starts as full-width in the xs tier, flexbox requires a .col-{breakpoint} class for each tier.

Chill? Awesome—keep reading for more information and some code snippets.

Auto-layout columns

Bootstrap 4 Flex Grid

Bootstrap 4 Flex Grid

When flexbox support is enabled, you can utilize breakpoint-specific column classes for equal-width columns. Add any number of .col-{breakpoint}s for each breakpoint you need and you’re good to go. For example, here’s are two grid layouts that apply to every device and viewport possible.

1 of 2
1 of 3

Auto-layout for flexbox grid columns also means you can set the width of one column and the others will automatically resize around it. You may use predefined grid classes (as shown below), grid mixins, or inline widths. Note that the other columns will resize no matter the width of the center column.

2 of 3 (wider)
2 of 3 (wider)

Responsive flexbox

Unlike the default grid system, the flexbox grid requires a class for full-width columns. If you have a .col-sm-6 and don’t add .col-xs-12, your xs grid will not render correctly. Note that flexbox grid tiers still scale up across breakpoints, so if you want two 50% wide columns across sm, md, and lg, you only need to set .col-sm-6.

1 of 2 (stacked on mobile)

Vertical alignment

Use the flexbox alignment utilities to vertically align columns.

One of three columns
One of three columns
One of three columns

Bootstrap 4 Flexbox Grid Tutorial

One of three columns

Bootstrap Flex Container

Horizontal alignment

Flexbox utilities for horizontal alignment also exist for a number of layout options.

One of two columns
One of two columns
One of two columns
One of two columns
One of two columns

Reordering

Flexbox utilities for controlling the visual order of your content.

Bootstrap Align Flex End

Second, but last