Flex

Quickly manage the layout, alignment, and sizing of grid columns, navigation, components, and more with a full suite of responsive flexbox utilities. For more complex implementations, custom CSS may be necessary.

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_sth and .d-inline-flex_sth.

• .d-flex_sth
• .d-inline-flex_sth
• .d-sm-flex_sth
• .d-sm-inline-flex_sth
• .d-md-flex_sth
• .d-md-inline-flex_sth
• .d-lg-flex_sth
• .d-lg-inline-flex_sth
• .d-xl-flex_sth
• .d-xl-inline-flex_sth

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_sth to set a horizontal direction (the browser default), or .flex-row-reverse_sth to start the horizontal direction from the opposite side.

<div class="d-flex_sth flex-row_sth">
  <div class="p-2_sth">Flex item 1</div>
  <div class="p-2_sth">Flex item 2</div>
  <div class="p-2_sth">Flex item 3</div>
</div>
<div class="d-flex_sth flex-row-reverse_sth">
  <div class="p-2_sth">Flex item 1</div>
  <div class="p-2_sth">Flex item 2</div>
  <div class="p-2_sth">Flex item 3</div>
</div>

Use .flex-column_sth to set a vertical direction, or .flex-column-reverse_sth to start the vertical direction from the opposite side.

<div class="d-flex_sth flex-column_sth">
  <div class="p-2_sth">Flex item 1</div>
  <div class="p-2_sth">Flex item 2</div>
  <div class="p-2_sth">Flex item 3</div>
</div>
<div class="d-flex_sth flex-column-reverse_sth">
  <div class="p-2_sth">Flex item 1</div>
  <div class="p-2_sth">Flex item 2</div>
  <div class="p-2_sth">Flex item 3</div>
</div>

Responsive variations also exist for flex-direction.

• .flex-row_sth
• .flex-row-reverse_sth
• .flex-column_sth
• .flex-column-reverse_sth
• .flex-sm-row_sth
• .flex-sm-row-reverse_sth
• .flex-sm-column_sth
• .flex-sm-column-reverse_sth
• .flex-md-row_sth
• .flex-md-row-reverse_sth
• .flex-md-column_sth
• .flex-md-column-reverse_sth
• .flex-lg-row_sth
• .flex-lg-row-reverse_sth
• .flex-lg-column_sth
• .flex-lg-column-reverse_sth
• .flex-xl-row_sth
• .flex-xl-row-reverse_sth
• .flex-xl-column_sth
• .flex-xl-column-reverse_sth

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.

<div class="d-flex_sth justify-content-start_sth">...</div>
<div class="d-flex_sth justify-content-end_sth">...</div>
<div class="d-flex_sth justify-content-center_sth">...</div>
<div class="d-flex_sth justify-content-between_sth">...</div>
<div class="d-flex_sth justify-content-around_sth">...</div>

Responsive variations also exist for justify-content.

• .justify-content-start_sth
• .justify-content-end_sth
• .justify-content-center_sth
• .justify-content-between_sth
• .justify-content-around_sth
• .justify-content-sm-start_sth
• .justify-content-sm-end_sth
• .justify-content-sm-center_sth
• .justify-content-sm-between_sth
• .justify-content-sm-around_sth
• .justify-content-md-start_sth
• .justify-content-md-end_sth
• .justify-content-md-center_sth
• .justify-content-md-between_sth
• .justify-content-md-around_sth
• .justify-content-lg-start_sth
• .justify-content-lg-end_sth
• .justify-content-lg-center_sth
• .justify-content-lg-between_sth
• .justify-content-lg-around_sth
• .justify-content-xl-start_sth
• .justify-content-xl-end_sth
• .justify-content-xl-center_sth
• .justify-content-xl-between_sth
• .justify-content-xl-around_sth

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).

<div class="d-flex_sth align-items-start_sth">...</div>
<div class="d-flex_sth align-items-end_sth">...</div>
<div class="d-flex_sth align-items-center_sth">...</div>
<div class="d-flex_sth align-items-baseline_sth">...</div>
<div class="d-flex_sth align-items-stretch_sth">...</div>

Responsive variations also exist for align-items.

• .align-items-start_sth
• .align-items-end_sth
• .align-items-center_sth
• .align-items-baseline_sth
• .align-items-stretch_sth
• .align-items-sm-start_sth
• .align-items-sm-end_sth
• .align-items-sm-center_sth
• .align-items-sm-baseline_sth
• .align-items-sm-stretch_sth
• .align-items-md-start_sth
• .align-items-md-end_sth
• .align-items-md-center_sth
• .align-items-md-baseline_sth
• .align-items-md-stretch_sth
• .align-items-lg-start_sth
• .align-items-lg-end_sth
• .align-items-lg-center_sth
• .align-items-lg-baseline_sth
• .align-items-lg-stretch_sth
• .align-items-xl-start_sth
• .align-items-xl-end_sth
• .align-items-xl-center_sth
• .align-items-xl-baseline_sth
• .align-items-xl-stretch_sth

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).

<div class="align-self-start_sth">Aligned flex item</div>
<div class="align-self-end_sth">Aligned flex item</div>
<div class="align-self-center_sth">Aligned flex item</div>
<div class="align-self-baseline_sth">Aligned flex item</div>
<div class="align-self-stretch_sth">Aligned flex item</div>

Responsive variations also exist for align-self.

• .align-self-start_sth
• .align-self-end_sth
• .align-self-center_sth
• .align-self-baseline_sth
• .align-self-stretch_sth
• .align-self-sm-start_sth
• .align-self-sm-end_sth
• .align-self-sm-center_sth
• .align-self-sm-baseline_sth
• .align-self-sm-stretch_sth
• .align-self-md-start_sth
• .align-self-md-end_sth
• .align-self-md-center_sth
• .align-self-md-baseline_sth
• .align-self-md-stretch_sth
• .align-self-lg-start_sth
• .align-self-lg-end_sth
• .align-self-lg-center_sth
• .align-self-lg-baseline_sth
• .align-self-lg-stretch_sth
• .align-self-xl-start_sth
• .align-self-xl-end_sth
• .align-self-xl-center_sth
• .align-self-xl-baseline_sth
• .align-self-xl-stretch_sth

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_sth">
  <div class="p-2_sth">Flex item</div>
  <div class="p-2_sth">Flex item</div>
  <div class="p-2_sth">Flex item</div>
</div>

<div class="d-flex_sth">
  <div class="mr-auto_sth p-2_sth">Flex item</div>
  <div class="p-2_sth">Flex item</div>
  <div class="p-2_sth">Flex item</div>
</div>

<div class="d-flex_sth">
  <div class="p-2_sth">Flex item</div>
  <div class="p-2_sth">Flex item</div>
  <div class="ml-auto_sth p-2_sth">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_sth align-items-start_sth flex-column_sth" style="height: 200px;">
  <div class="mb-auto_sth p-2_sth">Flex item</div>
  <div class="p-2_sth">Flex item</div>
  <div class="p-2_sth">Flex item</div>
</div>

<div class="d-flex_sth align-items-end_sth flex-column_sth" style="height: 200px;">
  <div class="p-2_sth">Flex item</div>
  <div class="p-2_sth">Flex item</div>
  <div class="mt-auto_sth p-2_sth">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.

<div class="d-flex_sth flex-nowrap_sth">
  ...
</div>

<div class="d-flex_sth flex-wrap_sth">
  ...
</div>

<div class="d-flex_sth flex-wrap-reverse_sth">
  ...
</div>

Responsive variations also exist for flex-wrap.

• .flex-nowrap_sth
• .flex-wrap_sth
• .flex-wrap-reverse_sth
• .flex-sm-nowrap_sth
• .flex-sm-wrap_sth
• .flex-sm-wrap-reverse_sth
• .flex-md-nowrap_sth
• .flex-md-wrap_sth
• .flex-md-wrap-reverse_sth
• .flex-lg-nowrap_sth
• .flex-lg-wrap_sth
• .flex-lg-wrap-reverse_sth
• .flex-xl-nowrap_sth
• .flex-xl-wrap_sth
• .flex-xl-wrap-reverse_sth

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_sth flex-nowrap_sth">
  <div class="order-3_sth p-2_sth">First flex item</div>
  <div class="order-2_sth p-2_sth">Second flex item</div>
  <div class="order-1_sth p-2_sth">Third flex item</div>
</div>

Responsive variations also exist for order.

• .order-1_sth
• .order-2_sth
• .order-3_sth
• .order-4_sth
• .order-5_sth
• .order-6_sth
• .order-7_sth
• .order-8_sth
• .order-9_sth
• .order-10_sth
• .order-11_sth
• .order-12_sth
• .order-sm-1_sth
• .order-sm-2_sth
• .order-sm-3_sth
• .order-sm-4_sth
• .order-sm-5_sth
• .order-sm-6_sth
• .order-sm-7_sth
• .order-sm-8_sth
• .order-sm-9_sth
• .order-sm-10_sth
• .order-sm-11_sth
• .order-sm-12_sth
• .order-md-1_sth
• .order-md-2_sth
• .order-md-3_sth
• .order-md-4_sth
• .order-md-5_sth
• .order-md-6_sth
• .order-md-7_sth
• .order-md-8_sth
• .order-md-9_sth
• .order-md-10_sth
• .order-md-11_sth
• .order-md-12_sth
• .order-lg-1_sth
• .order-lg-2_sth
• .order-lg-3_sth
• .order-lg-4_sth
• .order-lg-5_sth
• .order-lg-6_sth
• .order-lg-7_sth
• .order-lg-8_sth
• .order-lg-9_sth
• .order-lg-10_sth
• .order-lg-11_sth
• .order-lg-12_sth
• .order-xl-1_sth
• .order-xl-2_sth
• .order-xl-3_sth
• .order-xl-4_sth
• .order-xl-5_sth
• .order-xl-6_sth
• .order-xl-7_sth
• .order-xl-8_sth
• .order-xl-9_sth
• .order-xl-10_sth
• .order-xl-11_sth
• .order-xl-12_sth

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.

<div class="d-flex_sth align-content-start_sth flex-wrap_sth">
  ...
</div>

<div class="d-flex_sth align-content-end_sth flex-wrap_sth">...</div>

<div class="d-flex_sth align-content-center_sth flex-wrap_sth">...</div>

<div class="d-flex_sth align-content-between_sth flex-wrap_sth">...</div>

<div class="d-flex_sth align-content-around_sth flex-wrap_sth">...</div>

<div class="d-flex_sth align-content-stretch_sth flex-wrap_sth">...</div>

Responsive variations also exist for align-content.

• .align-content-start_sth
• .align-content-end_sth
• .align-content-center_sth
• .align-content-around_sth
• .align-content-stretch_sth
• .align-content-sm-start_sth
• .align-content-sm-end_sth
• .align-content-sm-center_sth
• .align-content-sm-around_sth
• .align-content-sm-stretch_sth
• .align-content-md-start_sth
• .align-content-md-end_sth
• .align-content-md-center_sth
• .align-content-md-around_sth
• .align-content-md-stretch_sth
• .align-content-lg-start_sth
• .align-content-lg-end_sth
• .align-content-lg-center_sth
• .align-content-lg-around_sth
• .align-content-lg-stretch_sth
• .align-content-xl-start_sth
• .align-content-xl-end_sth
• .align-content-xl-center_sth
• .align-content-xl-around_sth
• .align-content-xl-stretch_sth