css/flexbox.md at b74e78b2539925956ec19aa3efbf2410dc1167e0

primer/css

mirror of https://github.com/primer/css.git synced 2024-11-30 01:04:04 +03:00

* Remove "Atom packages"

* Remove Docset

* Remove "Local development"

* Remove "Table object"

* Move Grid to utilities

* Remove "Objects"

* Rename nav (marketing)

* Move marketing styles to their own section

* Discourage floats

* Update padding description

2022-01-24 02:53:57 +00:00

28 KiB

Raw Blame History

title	path	status	status_issue	source	bundle
Flexbox	utilities/flexbox	Stable	https://github.com/github/design-systems/issues/157	https://github.com/primer/css/blob/main/src/utilities/flexbox.scss	utilities

Flex utilities can be used to apply flexbox behaviors to elements by using utility classes.

Required reading

Before using these utilities, you should be familiar with CSS3 Flexible Box spec. If you are not, check out MDN's guide:

📖 Using CSS Flexible Boxes

Flex container

Use these classes to make an element lay out its content using the flexbox model. Each direct child of the flex container will become a flex item.

CSS

.d-flex { display: flex; }
.d-inline-flex { display: inline-flex; }

Classes

Class	Description
`.d-flex`	The element behaves like a block and lays out its content using the flexbox model.
`.d-inline-flex`	The element behaves like an inline element and lays out its content using the flexbox model.

Example using `.d-flex`

<!-- flex container -->
<div class="border d-flex">
  <div class="p-5 border color-bg-subtle">flex item 1</div>
  <div class="p-5 border color-bg-subtle">flex item 2</div>
  <div class="p-5 border color-bg-subtle">flex item 3</div>
</div>

Example using `.d-inline-flex`

<!-- inline-flex container -->
<div class="border d-inline-flex">
  <div class="p-5 border color-bg-subtle">flex item 1</div>
  <div class="p-5 border color-bg-subtle">flex item 2</div>
  <div class="p-5 border color-bg-subtle">flex item 3</div>
</div>

Flex direction

Use these classes to define the orientation of the main axis (row or column). By default, flex items will display in a row. Use .flex-column to change the direction of the main axis to vertical.

CSS

.flex-row            { flex-direction: row; }
.flex-row-reverse    { flex-direction: row-reverse; }
.flex-column         { flex-direction: column; }
.flex-column-reverse { flex-direction: column-reverse; }

Classes

Class	Description
`.flex-row`	The main axis runs left to right (default).
`.flex-row-reverse`	The main axis runs right to left.
`.flex-column`	The main axis runs top to bottom.
`.flex-column-reverse`	The main axis runs bottom to top.

Example using `.flex-column`

<div class="border d-flex flex-column">
  <div class="p-5 border color-bg-subtle">Item 1</div>
  <div class="p-5 border color-bg-subtle">Item 2</div>
  <div class="p-5 border color-bg-subtle">Item 3</div>
</div>

Example using `.flex-column-reverse`

This example uses the responsive variant .flex-sm-column-reverse to override .flex-column Learn more about responsive flexbox utilities here. Keep in mind that it won't affect screen readers or navigating with the keyboard and it's advised to keep the markup in a logical source order.

<div class="border d-flex flex-column flex-sm-column-reverse">
  <div class="p-5 border color-bg-subtle">Item 1</div>
  <div class="p-5 border color-bg-subtle">Item 2</div>
  <div class="p-5 border color-bg-subtle">Item 3</div>
</div>

Example using `.flex-row`

This example uses the responsive variant .flex-sm-row to override .flex-column Learn more about responsive flexbox utilities here.

<div class="border d-flex flex-column flex-sm-row">
  <div class="p-5 border color-bg-subtle">Item 1</div>
  <div class="p-5 border color-bg-subtle">Item 2</div>
  <div class="p-5 border color-bg-subtle">Item 3</div>
</div>

Example using `.flex-row-reverse`

This example uses the responsive variant .flex-sm-row-reverse to override .flex-column Learn more about responsive flexbox utilities here. Keep in mind that it won't affect screen readers or navigating with the keyboard and it's advised to keep the markup in a logical source order.

<div class="border d-flex flex-column flex-sm-row-reverse">
  <div class="p-5 border color-bg-subtle">Item 1</div>
  <div class="p-5 border color-bg-subtle">Item 2</div>
  <div class="p-5 border color-bg-subtle">Item 3</div>
</div>

Flex wrap

You can choose whether flex items are forced into a single line or wrapped onto multiple lines.

CSS

.flex-wrap           { flex-wrap: wrap; }
.flex-nowrap         { flex-wrap: nowrap; }
.flex-wrap-reverse   { flex-wrap: wrap-reverse; }

Classes

Class	Description
`.flex-wrap`	Flex items will break onto multiple lines (default)
`.flex-nowrap`	Flex items are laid out in a single line, even if they overflow
`.flex-wrap-reverse`	Behaves the same as wrap but cross-start and cross-end are permuted.

`flex-wrap` example

<div class="border d-flex flex-wrap">
  <div class="p-5 px-6 border color-bg-subtle">1</div>
  <div class="p-5 px-6 border color-bg-subtle">2</div>
  <div class="p-5 px-6 border color-bg-subtle">3</div>
  <div class="p-5 px-6 border color-bg-subtle">4</div>
  <div class="p-5 px-6 border color-bg-subtle">5</div>
  <div class="p-5 px-6 border color-bg-subtle">6</div>
  <div class="p-5 px-6 border color-bg-subtle">7</div>
  <div class="p-5 px-6 border color-bg-subtle">8</div>
  <div class="p-5 px-6 border color-bg-subtle">9</div>
</div>

`flex-nowrap` example

<div class="border d-flex flex-nowrap">
  <div class="p-5 px-6 border color-bg-subtle">1</div>
  <div class="p-5 px-6 border color-bg-subtle">2</div>
  <div class="p-5 px-6 border color-bg-subtle">3</div>
  <div class="p-5 px-6 border color-bg-subtle">4</div>
  <div class="p-5 px-6 border color-bg-subtle">5</div>
  <div class="p-5 px-6 border color-bg-subtle">6</div>
  <div class="p-5 px-6 border color-bg-subtle">7</div>
  <div class="p-5 px-6 border color-bg-subtle">8</div>
  <div class="p-5 px-6 border color-bg-subtle">9</div>
</div>

`flex-wrap-reverse` example

<div class="border d-flex flex-wrap-reverse">
  <div class="p-5 px-6 border color-bg-subtle">1</div>
  <div class="p-5 px-6 border color-bg-subtle">2</div>
  <div class="p-5 px-6 border color-bg-subtle">3</div>
  <div class="p-5 px-6 border color-bg-subtle">4</div>
  <div class="p-5 px-6 border color-bg-subtle">5</div>
  <div class="p-5 px-6 border color-bg-subtle">6</div>
  <div class="p-5 px-6 border color-bg-subtle">7</div>
  <div class="p-5 px-6 border color-bg-subtle">8</div>
  <div class="p-5 px-6 border color-bg-subtle">9</div>
</div>

Justify content

Use these classes to distribute space between and around flex items along the main axis of the container.

CSS

.flex-justify-start    { justify-content: flex-start; }
.flex-justify-end      { justify-content: flex-end; }
.flex-justify-center   { justify-content: center; }
.flex-justify-between  { justify-content: space-between; }
.flex-justify-around   { justify-content: space-around; }

Classes

Class	Default behavior
`.flex-justify-start`	Justify all items to the left
`.flex-justify-end`	Justify all items to the right
`.flex-justify-center`	Justify items to the center of the container
`.flex-justify-between`	Distribute items evenly. First item is on the start line, last item is on the end line.
`.flex-justify-around`	Distribute items evenly with equal space around them

flex-justify-start

Use .flex-justify-start to align items to the start line. By default this will be on the left side of the container. If you are using .flex-column, the start line will be at the top of the container.

<div class="border d-flex flex-justify-start">
  <div class="p-5 border color-bg-subtle">1</div>
  <div class="p-5 border color-bg-subtle">2</div>
  <div class="p-5 border color-bg-subtle">3</div>
</div>

flex-justify-end

Use .flex-justify-end to align items to the end line. By default this will be on the right side of the container. If you are using .flex-column, the end line will be at the bottom of the container.

<div class="border d-flex flex-justify-end">
 <div class="p-5 border color-bg-subtle">1</div>
 <div class="p-5 border color-bg-subtle">2</div>
 <div class="p-5 border color-bg-subtle">3</div>
</div>

flex-justify-center

Use .flex-justify-center to align items in the middle of the container.

<div class="border d-flex flex-justify-center">
 <div class="p-5 border color-bg-subtle">1</div>
 <div class="p-5 border color-bg-subtle">2</div>
 <div class="p-5 border color-bg-subtle">3</div>
</div>

flex-justify-between

Use .flex-justify-between to distribute items evenly in the container. The first items will be on the start line and the last item will be on the end line.

<div class="border d-flex flex-justify-between">
 <div class="p-5 border color-bg-subtle">1</div>
 <div class="p-5 border color-bg-subtle">2</div>
 <div class="p-5 border color-bg-subtle">3</div>
</div>

flex-justify-around

Use .flex-justify-around to distribute items evenly, with an equal amount of space around them. Visually the spaces won't look equal, since each item has the same unit of space around it. For example, the first item only has one unit of space between it and the start line, but it has two units of space between it and the next item.

<div class="border d-flex flex-justify-around">
 <div class="p-5 border color-bg-subtle">1</div>
 <div class="p-5 border color-bg-subtle">2</div>
 <div class="p-5 border color-bg-subtle">3</div>
</div>

Align items

Use these classes to align items on the cross axis.

The cross axis runs perpendicular to the main axis. By default the main axis runs horizontally, so your items will align vertically on the cross axis. If you use flex-column to make the main axis run vertically, your items will be aligned horizontally.

CSS

.flex-items-start      { align-items: flex-start; }
.flex-items-end        { align-items: flex-end; }
.flex-items-center     { align-items: center; }
.flex-items-baseline   { align-items: baseline; }
.flex-items-stretch    { align-items: stretch; }

Classes

Class	Behavior
`.flex-items-start`	Align items to the start of the cross axis
`.flex-items-end`	Align items to the end of the cross axis
`.flex-items-center`	Align items to the center of the cross axis
`.flex-items-baseline`	Align items along their baselines
`.flex-items-stretch`	Stretch items from start of cross axis to end of cross axis

flex-items-start

<div  style="min-height: 150px;" class="border d-flex flex-items-start">
  <div class="p-5 border color-bg-subtle">1</div>
  <div class="p-5 border color-bg-subtle">2</div>
  <div class="p-5 border color-bg-subtle">3</div>
  <div class="p-5 border color-bg-subtle">4</div>
</div>

flex-items-end

<div  style="min-height: 150px;" class="border d-flex flex-items-end">
  <div class="p-5 border color-bg-subtle">1</div>
  <div class="p-5 border color-bg-subtle">2</div>
  <div class="p-5 border color-bg-subtle">3</div>
  <div class="p-5 border color-bg-subtle">4</div>
</div>

flex-items-center

<div  style="min-height: 150px;" class="border d-flex flex-items-center">
  <div class="p-5 border color-bg-subtle">1</div>
  <div class="p-5 border color-bg-subtle">2</div>
  <div class="p-5 border color-bg-subtle">3</div>
  <div class="p-5 border color-bg-subtle">4</div>
</div>

flex-items-baseline

With .flex-items-baseline, items will be aligned along their baselines even if they have different font sizes.

<div  style="min-height: 150px;" class="border d-flex flex-items-baseline">
  <div class="p-5 border color-bg-subtle f1">1</div>
  <div class="p-5 border color-bg-subtle">2</div>
  <div class="p-5 border color-bg-subtle f3">3</div>
  <div class="p-5 border color-bg-subtle">4</div>
</div>

flex-items-stretch

<div  style="min-height: 150px;" class="border d-flex flex-items-stretch">
  <div class="p-5 border color-bg-subtle">1</div>
  <div class="p-5 border color-bg-subtle">2</div>
  <div class="p-5 border color-bg-subtle">3</div>
  <div class="p-5 border color-bg-subtle">4</div>
</div>

Align content

When the main axis wraps, this creates multiple main axis lines and adds extra space in the cross axis. Use these classes to align the lines of the main axis on the cross axis.

CSS

.flex-content-start    { align-content: flex-start; }
.flex-content-end      { align-content: flex-end; }
.flex-content-center   { align-content: center; }
.flex-content-between  { align-content: space-between; }
.flex-content-around   { align-content: space-around; }
.flex-content-stretch  { align-content: stretch; }

Classes

Class	Description
`.flex-content-start`	Align content to the start of the cross axis
`.flex-content-end`	Align content to the end of the cross axis
`.flex-content-center`	Align content to the center of the cross axis
`.flex-content-between`	Distribute content evenly. First line is on the start of the cross axis, last line is on the end of the cross axis.
`.flex-content-around`	Stretch items from the start of the cross axis to the end of the cross axis.
`.flex-content-stretch`	Lines stretch to occupy available space.

flex-content-start

<div style="min-height: 300px;" class="border d-flex flex-wrap flex-content-start">
  <div class="p-5 border color-bg-subtle">1</div>
  <div class="p-5 border color-bg-subtle">2</div>
  <div class="p-5 border color-bg-subtle">3</div>
  <div class="p-5 border color-bg-subtle">4</div>
  <div class="p-5 border color-bg-subtle">5</div>
  <div class="p-5 border color-bg-subtle">6</div>
  <div class="p-5 border color-bg-subtle">7</div>
  <div class="p-5 border color-bg-subtle">8</div>
  <div class="p-5 border color-bg-subtle">9</div>
  <div class="p-5 border color-bg-subtle">10</div>
  <div class="p-5 border color-bg-subtle">11</div>
  <div class="p-5 border color-bg-subtle">12</div>
</div>

flex-content-end

<div style="min-height: 300px;" class="border d-flex flex-wrap flex-content-end">
  <div class="p-5 border color-bg-subtle">1</div>
  <div class="p-5 border color-bg-subtle">2</div>
  <div class="p-5 border color-bg-subtle">3</div>
  <div class="p-5 border color-bg-subtle">4</div>
  <div class="p-5 border color-bg-subtle">5</div>
  <div class="p-5 border color-bg-subtle">6</div>
  <div class="p-5 border color-bg-subtle">7</div>
  <div class="p-5 border color-bg-subtle">8</div>
  <div class="p-5 border color-bg-subtle">9</div>
  <div class="p-5 border color-bg-subtle">10</div>
  <div class="p-5 border color-bg-subtle">11</div>
  <div class="p-5 border color-bg-subtle">12</div>
</div>

flex-content-center

<div style="min-height: 300px;" class="border d-flex flex-wrap flex-content-center">
  <div class="p-5 border color-bg-subtle">1</div>
  <div class="p-5 border color-bg-subtle">2</div>
  <div class="p-5 border color-bg-subtle">3</div>
  <div class="p-5 border color-bg-subtle">4</div>
  <div class="p-5 border color-bg-subtle">5</div>
  <div class="p-5 border color-bg-subtle">6</div>
  <div class="p-5 border color-bg-subtle">7</div>
  <div class="p-5 border color-bg-subtle">8</div>
  <div class="p-5 border color-bg-subtle">9</div>
  <div class="p-5 border color-bg-subtle">10</div>
  <div class="p-5 border color-bg-subtle">11</div>
  <div class="p-5 border color-bg-subtle">12</div>
</div>

flex-content-between

<div style="min-height: 300px;" class="border d-flex flex-wrap flex-content-between">
  <div class="p-5 border color-bg-subtle">1</div>
  <div class="p-5 border color-bg-subtle">2</div>
  <div class="p-5 border color-bg-subtle">3</div>
  <div class="p-5 border color-bg-subtle">4</div>
  <div class="p-5 border color-bg-subtle">5</div>
  <div class="p-5 border color-bg-subtle">6</div>
  <div class="p-5 border color-bg-subtle">7</div>
  <div class="p-5 border color-bg-subtle">8</div>
  <div class="p-5 border color-bg-subtle">9</div>
  <div class="p-5 border color-bg-subtle">10</div>
  <div class="p-5 border color-bg-subtle">11</div>
  <div class="p-5 border color-bg-subtle">12</div>
</div>

flex-content-around

<div style="min-height: 300px;" class="border d-flex flex-wrap flex-content-around">
  <div class="p-5 border color-bg-subtle">1</div>
  <div class="p-5 border color-bg-subtle">2</div>
  <div class="p-5 border color-bg-subtle">3</div>
  <div class="p-5 border color-bg-subtle">4</div>
  <div class="p-5 border color-bg-subtle">5</div>
  <div class="p-5 border color-bg-subtle">6</div>
  <div class="p-5 border color-bg-subtle">7</div>
  <div class="p-5 border color-bg-subtle">8</div>
  <div class="p-5 border color-bg-subtle">9</div>
  <div class="p-5 border color-bg-subtle">10</div>
  <div class="p-5 border color-bg-subtle">11</div>
  <div class="p-5 border color-bg-subtle">12</div>
</div>

flex-content-stretch

<div style="min-height: 300px;" class="border d-flex flex-wrap flex-content-stretch">
  <div class="p-5 border color-bg-subtle">1</div>
  <div class="p-5 border color-bg-subtle">2</div>
  <div class="p-5 border color-bg-subtle">3</div>
  <div class="p-5 border color-bg-subtle">4</div>
  <div class="p-5 border color-bg-subtle">5</div>
  <div class="p-5 border color-bg-subtle">6</div>
  <div class="p-5 border color-bg-subtle">7</div>
  <div class="p-5 border color-bg-subtle">8</div>
  <div class="p-5 border color-bg-subtle">9</div>
  <div class="p-5 border color-bg-subtle">10</div>
  <div class="p-5 border color-bg-subtle">11</div>
  <div class="p-5 border color-bg-subtle">12</div>
</div>

Flex

Use this class to specify the ability of a flex item to alter its dimensions to fill available space.

.flex-1        { flex: 1; }
.flex-auto     { flex: auto; }
.flex-grow-0   { flex-grow: 0; }
.flex-shrink-0 { flex-shrink: 0; }

Class	Description
`.flex-1`	Fills available space
`.flex-auto`	Fills available space and auto-sizes based on the content
`.flex-grow-0`	Prevents growing of a flex item
`.flex-shrink-0`	Prevents shrinking of a flex item

flex-1

Adding .flex-1 makes the item grow in size to take up all the space that is available.

<div class="border d-flex">
  <div class="p-5 border color-bg-subtle">flex item</div>
  <div class="p-5 border color-bg-subtle flex-1">.flex-1</div>
  <div class="p-5 border color-bg-subtle">flex item</div>
</div>

Adding .flex-1 to all flex items results in each item having the same size.

<div class="border d-flex">
  <div class="p-5 border color-bg-subtle flex-1">.flex-1</div>
  <div class="p-5 border color-bg-subtle flex-1">.flex-1</div>
  <div class="p-5 border color-bg-subtle flex-1">.flex-1</div>
</div>

flex-auto

Using .flex-auto fills the available space but also takes the size of the content into account. Type in the editor below to see the effect.

<div class="border d-flex">
  <div class="p-5 border color-bg-subtle flex-1">.flex-1</div>
  <div class="p-5 border color-bg-subtle flex-auto">.flex-auto with a bit more text</div>
  <div class="p-5 border color-bg-subtle flex-1">.flex-1</div>
</div>

flex-grow-0

Add .flex-grow-0 to prevent an item from growing. This can be useful when used as a responsive variant. For example to stop growing when the viewport gets wider.

<div class="border d-flex">
  <div class="p-5 border color-bg-subtle">flex item</div>
  <div class="p-5 border color-bg-subtle flex-auto flex-sm-grow-0">.flex-auto .flex-sm-grow-0</div>
  <div class="p-5 border color-bg-subtle">flex item</div>
</div>

flex-shrink-0

Add .flex-shrink-0 to prevent an item from shrinking. Note that for example text will not wrap and the flex items start to overflow if there is not enough space.

<div class="p-2 border d-flex" style="max-width: 340px">
  <div class="p-5 border color-bg-subtle">flex item</div>
  <div class="p-5 border color-bg-subtle flex-shrink-0">.flex-shrink-0</div>
  <div class="p-5 border color-bg-subtle">flex item</div>
</div>

Align self

Use these classes to adjust the alignment of an individual flex item on the cross axis. This overrides any align-items property applied to the flex container.

CSS

.flex-self-auto        { align-self: auto; }
.flex-self-start       { align-self: flex-start; }
.flex-self-end         { align-self: flex-end; }
.flex-self-center      { align-self: center; }
.flex-self-baseline    { align-self: baseline; }
.flex-self-stretch     { align-self: stretch; }

Classes

Class	Description
`.flex-self-auto`	Inherit alignment from parent
`.flex-self-start`	Align to the start of the cross axis
`.flex-self-end`	Align to the end of the cross axis
`.flex-self-center`	Align to center of cross axis
`.flex-self-baseline`	Align baseline to the start of the cross axis
`.flex-self-stretch`	Stretch item from start of cross axis to end of cross axis.

flex-self-auto

<div style="min-height: 150px;" class="border d-flex">
  <div class="p-5 border color-bg-subtle flex-self-auto">.flex-self-auto</div>
  <div class="p-5 border color-bg-subtle">&nbsp;</div>
  <div class="p-5 border color-bg-subtle">&nbsp;</div>
</div>

flex-self-start

<div style="min-height: 150px;" class="border d-flex">
  <div class="p-5 border color-bg-subtle flex-self-start">.flex-self-start</div>
  <div class="p-5 border color-bg-subtle">&nbsp;</div>
  <div class="p-5 border color-bg-subtle">&nbsp;</div>
</div>

flex-self-end

<div style="min-height: 150px;" class="border d-flex">
  <div class="p-5 border color-bg-subtle flex-self-end">.flex-self-end</div>
  <div class="p-5 border color-bg-subtle">&nbsp;</div>
  <div class="p-5 border color-bg-subtle">&nbsp;</div>
</div>

flex-self-center

<div style="min-height: 150px;" class="border d-flex">
  <div class="p-5 border color-bg-subtle flex-self-center">.flex-self-center</div>
  <div class="p-5 border color-bg-subtle">&nbsp;</div>
  <div class="p-5 border color-bg-subtle">&nbsp;</div>
</div>

flex-self-baseline

<div style="min-height: 150px;" class="border d-flex flex-items-end">
  <div class="p-5 border color-bg-subtle flex-self-baseline f4">.flex-self-baseline</div>
  <div class="p-5 border color-bg-subtle f1">item</div>
  <div class="p-5 border color-bg-subtle f00">item</div>
</div>

flex-self-stretch

<div style="min-height: 150px;" class="border d-flex flex-items-start">
  <div class="p-5 border color-bg-subtle flex-self-stretch">.flex-self-stretch</div>
  <div class="p-5 border color-bg-subtle">&nbsp;</div>
  <div class="p-5 border color-bg-subtle">&nbsp;</div>
</div>

Order

Use these classes to change the order of flex items. Keep in mind that it won't affect screen readers or navigating with the keyboard and it's advised to keep the markup in a logical source order.

CSS

.flex-order-1    { order: 1; }
.flex-order-2    { order: 2; }
.flex-order-none { order: inherit; }

Classes

Class	Description
`.flex-order-1`	Set order to be 1
`.flex-order-2`	Set order to be 2
`.flex-order-none`	Remove order (typically used with responsive variants)

flex-order (1+2)

<div class="border d-flex">
  <div class="p-5 border color-bg-subtle flex-order-2">1. .flex-order-2</div>
  <div class="p-5 border color-bg-subtle">2.</div>
  <div class="p-5 border color-bg-subtle flex-order-1">3. .flex-order-1</div>
</div>

flex-order-none

Resize window to see the effect.

<div class="border d-flex">
  <div class="p-5 border color-bg-subtle flex-order-1 flex-sm-order-none">1. .flex-order-1 .flex-sm-order-none</div>
  <div class="p-5 border color-bg-subtle">2.</div>
  <div class="p-5 border color-bg-subtle">3.</div>
</div>

Responsive flex utilities

All flexbox utilities can be adjusted per breakpoint using the following formulas:

d-[breakpoint]-[property] for display
flex-[breakpoint]-[property]-[behavior] for various flex properties

Each responsive style is applied to the specified breakpoint and up.

Example classes

/* Example classes */

.d-sm-flex {}
.d-md-inline-flex {}

.flex-lg-row {}
.flex-xl-column {}

.flex-sm-wrap {}
.flex-lg-nowrap {}

.flex-lg-self-start {}

Example usage

Mixing flex properties:

<div style="min-height: 150px;" class="border d-flex flex-items-start flex-sm-items-center flex-justify-start flex-lg-justify-between">
  <div class="p-5 border color-bg-subtle flex-sm-self-stretch">.flex-self-stretch</div>
  <div class="p-5 border color-bg-subtle">&nbsp;</div>
  <div class="p-5 border color-bg-subtle">&nbsp;</div>
</div>

Example components

The flex utilities can be used to create a number of components. Here are some examples.

Media object

You can use flex utilities to make a simple media object, like this:

<div class="border d-flex flex-items-center p-4">
  <div class="p-5 border color-bg-subtle">image</div>
  <p class="pl-4 m-0"><b>Body</b> Bacon ipsum dolor sit amet chuck prosciutto landjaeger ham hock filet mignon shoulder hamburger pig venison.</p>
</div>

Responsive media object

Here is an example of a media object that is vertically centered on large screens, but converts to a stacked column layout on small screens.

<div class="border p-3 d-flex flex-column flex-sm-row flex-sm-items-center">
  <div class="pr-0 pr-sm-3 mb-3 mb-sm-0 d-flex flex-justify-center flex-sm-justify-start">
    <img style="max-width:100px; max-height:100px;" src="https://github.com/github.png" />
  </div>
  <div class="d-flex text-center text-sm-left">
    <p><b>Body</b> Bacon ipsum dolor sit amet chuck prosciutto landjaeger ham hock filet mignon shoulder hamburger pig venison.</p>
  </div>
  <div class="ml-sm-3 d-flex flex-justify-center">
    <!-- <%= octicon "mark-github", :height => '32' %> -->
    <svg height="32" class="octicon octicon-mark-github" viewBox="0 0 16 16" version="1.1" width="32" aria-hidden="true"><path fill-rule="evenodd" d="M8 0C3.58 0 0 3.58 0 8c0 3.54 2.29 6.53 5.47 7.59.4.07.55-.17.55-.38 0-.19-.01-.82-.01-1.49-2.01.37-2.53-.49-2.69-.94-.09-.23-.48-.94-.82-1.13-.28-.15-.68-.52-.01-.53.63-.01 1.08.58 1.23.82.72 1.21 1.87.87 2.33.66.07-.52.28-.87.51-1.07-1.78-.2-3.64-.89-3.64-3.95 0-.87.31-1.59.82-2.15-.08-.2-.36-1.02.08-2.12 0 0 .67-.21 2.2.82.64-.18 1.32-.27 2-.27.68 0 1.36.09 2 .27 1.53-1.04 2.2-.82 2.2-.82.44 1.1.16 1.92.08 2.12.51.56.82 1.27.82 2.15 0 3.07-1.87 3.75-3.65 3.95.29.25.54.73.54 1.48 0 1.07-.01 1.93-.01 2.2 0 .21.15.46.55.38A8.013 8.013 0 0 0 16 8c0-4.42-3.58-8-8-8z"></path></svg>
  </div>
</div>

Flexbox bugs

This section lists flexbox bugs that affect browsers we currently support.

Minimum content sizing of flex items not honored. Some browsers don't respect flex item size. Instead of respecting the minimum content size, items shrink below their minimum size which can create some undesirable results, such as overflowing text. The workaround is to apply flex-shrink: 0; to the items using d-flex. This can be applied with the flex-shrink-0 utility. For more information read philipwalton/flexbugs.
Some elements can't be flex containers. Specifically, <button>, <fieldset>, and <summary> elements cannot be styled with display: flex in Safari. Instead of using class="d-flex" on these elements, you should nest an element within them, e.g. <summary><div class="d-flex">...</div></summary>.

28 KiB Raw Blame History

Required reading

Flex container

CSS

Classes

Example using .d-flex

Example using .d-inline-flex

Flex direction

CSS

Classes

Example using .flex-column

Example using .flex-column-reverse

Example using .flex-row

Example using .flex-row-reverse

Flex wrap

CSS

Classes

flex-wrap example

flex-nowrap example

flex-wrap-reverse example

Justify content

CSS

Classes

flex-justify-start

flex-justify-end

flex-justify-center

flex-justify-between

flex-justify-around

Align items

CSS

Classes

flex-items-start

flex-items-end

flex-items-center

flex-items-baseline

flex-items-stretch

Align content

CSS

Classes

flex-content-start

flex-content-end

flex-content-center

flex-content-between

flex-content-around

flex-content-stretch

Flex

flex-1

flex-auto

flex-grow-0

flex-shrink-0

Align self

CSS

Classes

flex-self-auto

flex-self-start

flex-self-end

flex-self-center

flex-self-baseline

flex-self-stretch

Order

CSS

Classes

flex-order (1+2)

flex-order-none

Responsive flex utilities

Example classes

Example usage

Example components

Media object

Responsive media object

Flexbox bugs

28 KiB

Raw Blame History

Example using `.d-flex`

Example using `.d-inline-flex`

Example using `.flex-column`

Example using `.flex-column-reverse`

Example using `.flex-row`

Example using `.flex-row-reverse`

`flex-wrap` example

`flex-nowrap` example

`flex-wrap-reverse` example