Enable flex behaviors
Apply display
utilities to create a flexbox container and transform direct children elements into flex items. Flex containers and items are able to be modified further with additional flex properties.
<div class="d-flex p-2">I'm a flexbox container!</div>
<div class="d-inline-flex p-2">I'm an inline flexbox container!</div>
Responsive variations also exist for .d-flex
and .d-inline-flex
.
Direction
Set the direction of flex items in a flex container with direction utilities. In most cases you can omit the horizontal class here as the browser default is row
. However, you may encounter situations where you needed to explicitly set this value (like responsive layouts).
Use .flex-row
to set a horizontal direction (the browser default), or .flex-row-reverse
to start the horizontal direction from the opposite side.
<div class="d-flex flex-row">
<div class="p-2">Flex item 1</div>
<div class="p-2">Flex item 2</div>
<div class="p-2">Flex item 3</div>
</div>
<div class="d-flex flex-row-reverse">
<div class="p-2">Flex item 1</div>
<div class="p-2">Flex item 2</div>
<div class="p-2">Flex item 3</div>
</div>
Use .flex-column
to set a vertical direction, or .flex-column-reverse
to start the vertical direction from the opposite side.
<div class="d-flex flex-column">
<div class="p-2">Flex item 1</div>
<div class="p-2">Flex item 2</div>
<div class="p-2">Flex item 3</div>
</div>
<div class="d-flex flex-column-reverse">
<div class="p-2">Flex item 1</div>
<div class="p-2">Flex item 2</div>
<div class="p-2">Flex item 3</div>
</div>
Responsive variations also exist for flex-direction
.
Justify content
Use justify-content
utilities on flexbox containers to change the alignment of flex items on the main axis (the x-axis to start, y-axis if flex-direction: column
). Choose from start
(browser default), end
, center
, between
, or around
.
Responsive variations also exist for justify-content
.
Align items
Use align-items
utilities on flexbox containers to change the alignment of flex items on the cross axis (the y-axis to start, x-axis if flex-direction: column
). Choose from start
, end
, center
, baseline
, or stretch
(browser default).
Responsive variations also exist for align-items
.
Align self
Use align-self
utilities on flexbox items to individually change their alignment on the cross axis (the y-axis to start, x-axis if flex-direction: column
). Choose from the same options as align-items
: start
, end
, center
, baseline
, or stretch
(browser default).
Responsive variations also exist for align-self
.
Fill
Use the .flex-fill
class on a series of sibling elements to force them into equal widths while taking up all available horizontal space. Especially useful for equal-width, or justified, navigation.
<div class="d-flex">
<div class="p-2 flex-fill">Flex item</div>
<div class="p-2 flex-fill">Flex item</div>
<div class="p-2 flex-fill">Flex item</div>
</div>
Responsive variations also exist for flex-fill
.
Auto margins
Flexbox can do some pretty awesome things when you mix flex alignments with auto margins. Shown below are three examples of controlling flex items via auto margins: default (no auto margin), pushing two items to the right (.mr-auto
), and pushing two items to the left (.ml-auto
).
Unfortunately, IE10 and IE11 do not properly support auto margins on flex items whose parent has a non-default justify-content
value. See this StackOverflow answer for more details.
<div class="d-flex">
<div class="p-2">Flex item</div>
<div class="p-2">Flex item</div>
<div class="p-2">Flex item</div>
</div>
<div class="d-flex">
<div class="mr-auto p-2">Flex item</div>
<div class="p-2">Flex item</div>
<div class="p-2">Flex item</div>
</div>
<div class="d-flex">
<div class="p-2">Flex item</div>
<div class="p-2">Flex item</div>
<div class="ml-auto p-2">Flex item</div>
</div>
With align-items
Vertically move one flex item to the top or bottom of a container by mixing align-items
, flex-direction: column
, and margin-top: auto
or margin-bottom: auto
.
<div class="d-flex align-items-start flex-column" style="height: 200px;">
<div class="mb-auto p-2">Flex item</div>
<div class="p-2">Flex item</div>
<div class="p-2">Flex item</div>
</div>
<div class="d-flex align-items-end flex-column" style="height: 200px;">
<div class="p-2">Flex item</div>
<div class="p-2">Flex item</div>
<div class="mt-auto p-2">Flex item</div>
</div>
Wrap
Change how flex items wrap in a flex container. Choose from no wrapping at all (the browser default) with .flex-nowrap
, wrapping with .flex-wrap
, or reverse wrapping with .flex-wrap-reverse
.
Responsive variations also exist for flex-wrap
.
Order
Change the visual order of specific flex items with a handful of order
utilities. We only provide options for making an item first or last, as well as a reset to use the DOM order. As order
takes any integer value (e.g., 5
), add custom CSS for any additional values needed.
<div class="d-flex flex-nowrap">
<div class="order-3 p-2">First flex item</div>
<div class="order-2 p-2">Second flex item</div>
<div class="order-1 p-2">Third flex item</div>
</div>
Responsive variations also exist for order
.
Align content
Use align-content
utilities on flexbox containers to align flex items together on the cross axis. Choose from start
(browser default), end
, center
, between
, around
, or stretch
. To demonstrate these utilities, we’ve enforced flex-wrap: wrap
and increased the number of flex items.
Heads up! This property has no effect on single rows of flex items.
Responsive variations also exist for align-content
.