Bootstrap 4 Flex
Bootstrap 4 Flex
Use flex classes to control the layout of Bootstrap 4 components.
Flexbox
The biggest difference between Bootstrap 3 and Bootstrap 4 is that Bootstrap 4 now uses flexbox, instead of floats, to handle the layout.
The Flexible Box Layout Module, makes it easier to design flexible responsive layout structure without using float or positioning. If you are new to flex, you can read about it in our CSS Flexbox Tutorial.
Note: Flexbox is not supported in IE9 and earlier versions.
If you require IE8-9 support, use Bootstrap 3. It is the most stable version of Bootstrap, and it is still supported by the team for critical bugfixes and documentation changes. However, no new features will be added to it.
To create a flexbox container and to transform direct children into flex items, use the d-flex class:
Example
Example
<div class="d-flex p-3 bg-secondary text-white">
<div class="p-2 bg-info">Flex item 1</div>
<div class="p-2 bg-warning">Flex
item 2</div>
<div class="p-2 bg-primary">Flex item 3</div>
</div>
Try it Yourself »To create an inline flexbox container, use the d-inline-flex class:
Example
Example
<div class="d-inline-flex p-3 bg-secondary text-white">
<div class="p-2 bg-info">Flex item 1</div>
<div class="p-2 bg-warning">Flex
item 2</div>
<div class="p-2 bg-primary">Flex item 3</div>
</div>
Try it Yourself »Horizontal Direction
Use .flex-row to display the flex items
horizontally (side by side). This is default.
Tip: Use .flex-row-reverse
to right-align the horizontal direction:
Example
Example
<div class="d-flex flex-row
bg-secondary">
<div class="p-2 bg-info">Flex
item 1</div>
<div class="p-2 bg-warning">Flex item 2</div>
<div class="p-2 bg-primary">Flex item 3</div>
</div>
<div
class="d-flex flex-row-reverse bg-secondary">
<div class="p-2 bg-info">Flex
item 1</div>
<div class="p-2 bg-warning">Flex item 2</div>
<div class="p-2 bg-primary">Flex item 3</div>
</div>
Try it Yourself »Vertical Direction
Use .flex-column to display the flex items vertically (on top of each other), or .flex-column-reverse
to reverse the vertical direction:
Example
Example
<div class="d-flex flex-column">
<div class="p-2 bg-info">Flex
item 1</div>
<div class="p-2 bg-warning">Flex item 2</div>
<div class="p-2 bg-primary">Flex item 3</div>
</div>
<div
class="d-flex flex-column-reverse">
<div class="p-2 bg-info">Flex
item 1</div>
<div class="p-2 bg-warning">Flex item 2</div>
<div class="p-2 bg-primary">Flex item 3</div>
</div>
Try it Yourself »Justify Content
Use the .justify-content-* classes to change the alignment of flex items. Valid classes are start (default), end, center, between or around:
Example
Example
<div class="d-flex justify-content-start">...</div>
<div class="d-flex
justify-content-end">...</div>
<div class="d-flex
justify-content-center">...</div>
<div class="d-flex
justify-content-between">...</div>
<div class="d-flex
justify-content-around">...</div>
Try it Yourself »Fill / Equal Widths
Use .flex-fill on flex items to force them into equal widths:
Example
Example
<div class="d-flex">
<div class="p-2 bg-info
flex-fill">Flex
item 1</div>
<div class="p-2 bg-warning flex-fill">Flex item 2</div>
<div class="p-2 bg-primary flex-fill">Flex item 3</div>
</div>
Try it Yourself »Grow
Use .flex-grow-1 on a flex item to take up the rest of the space. In the example below, the first two flex items take up their necessary space, while the last item takes up the rest of the available space:
Example
Example
<div class="d-flex">
<div class="p-2 bg-info">Flex
item 1</div>
<div class="p-2 bg-warning">Flex item 2</div>
<div class="p-2 bg-primary flex-grow-1">Flex item 3</div>
</div>
Try it Yourself »Tip: Use .flex-shrink-1 on a flex item to make it shrink if necessary.
Order
Change the visual order of a specific flex item(s) with the .order classes. Valid classes are from 0 to 12, where the lowest number has highest priority (order-1 is shown before order-2, etc..):
Example
Example
<div class="d-flex bg-secondary">
<div class="p-2 bg-info
order-3">Flex
item 1</div>
<div class="p-2 bg-warning order-2">Flex item 2</div>
<div class="p-2 bg-primary order-1">Flex item 3</div>
</div>
Try it Yourself »Auto Margins
Easily add auto margins to flex items with .mr-auto (push items to the right), or by using .ml-auto (push items to the left):
Example
Example
<div class="d-flex
bg-secondary">
<div class="p-2 mr-auto bg-info">Flex
item 1</div>
<div class="p-2 bg-warning">Flex item 2</div>
<div class="p-2 bg-primary">Flex item 3</div>
</div>
<div class="d-flex bg-secondary">
<div
class="p-2 bg-info">Flex item 1</div>
<div class="p-2 bg-warning">Flex
item 2</div>
<div class="p-2 ml-auto bg-primary">Flex item
3</div>
</div>
Try it Yourself »Wrap
Control how flex items wrap in a flex container with .flex-nowrap (default), .flex-wrap or .flex-wrap-reverse.
Click on the buttons below to see the difference between the three classes, by changin the wrapping of the flex items in the example box:
Example
Example
<div class="d-flex flex-wrap">..</div>
<div class="d-flex
flex-wrap-reverse">..</div>
<div class="d-flex
flex-nowrap">..</div>
Try it Yourself »Align Content
Control the vertical alignment of gathered flex items with the .align-content-*
classes. Valid classes are .align-content-start (default), .align-content-end, .align-content-center, .align-content-between, .align-content-around and .align-content-stretch.
Note: These classes have no effect on single rows of flex items.
Example
Example
<div class="d-flex flex-wrap
align-content-start">..</div>
<div class="d-flex
flex-wrap align-content-end">..</div>
<div class="d-flex
flex-wrap align-content-center">..</div>
<div class="d-flex
flex-wrap align-content-around">..</div>
<div class="d-flex
flex-wrap align-content-stretch">..</div>
Try it Yourself »Align Items
Control the vertical alignment of single rows of flex items with the .align-items-*
classes. Valid classes are .align-items-start, .align-items-end, .align-items-center, .align-items-baseline, and .align-items-stretch
(default).
Click on the buttons below to see the difference between the five classes:
Example
Example
<div class="d-flex align-items-start">..</div>
<div class="d-flex
align-items-end">..</div>
<div class="d-flex
align-items-center">..</div>
<div class="d-flex align-items-baseline">..</div>
<div class="d-flex
align-items-stretch">..</div>
Try it Yourself »Align Self
Control the vertical alignment of a specified flex item with the .align-self-*
classes. Valid classes are .align-self-start, .align-self-end, .align-self-center, .align-self-baseline, and .align-self-stretch
(default).
Click on the buttons below to see the difference between the five classes:
Example
Example
<div class="d-flex bg-light" style="height:150px">
<div
class="p-2 border">Flex item 1</div>
<div class="p-2 border
align-self-start">Flex item 2</div>
<div
class="p-2 border">Flex item 3</div>
</div>
Try it Yourself »Responsive Flex Classes
All flex classes comes with additional responsive classes, which makes it easy to set a specific flex class on a specific screen size.
The * symbol can be replaced with sm, md, lg or xl, which represents small, medium, large or xlarge screens.
| Class | Description | Example |
|---|---|---|
| Flex Container | ||
.d-*-flex |
Creates a flexbox container for different screens | Try it |
.d-*-inline-flex |
Creates an inline flexbox container for different screens | Try it |
| Direction | ||
.flex-*-row |
Display flex items horizontally on different screens | Try it |
.flex-*-row-reverse |
Display flex items horizontally, and right-aligned, on different screens | Try it |
.flex-*-column |
Display flex items vertically on different screens | Try it |
.flex-*-column-reverse |
Display flex items vertically, with reversed order, on different screens screens | Try it |
| Justified Content | ||
.justify-content-*-start |
Display flex items from the start (left-aligned) on different screens | Try it |
.justify-content-*-end |
Display flex items at the end (right-aligned) on different screens | Try it |
.justify-content-*-center |
Display flex items in the center of a flex container on different screens | Try it |
.justify-content-*-between |
Display flex items in "between" on different screens | Try it |
.justify-content-*-around |
Display flex items "around" on different screens | Try it |
| Fill / Equal Width | ||
.flex-*-fill |
Force flex items into equal widths on different screens | Try it |
| Grow | ||
.flex-*-grow-0 |
Don't make the items grow on different screens | |
.flex-*-grow-1 |
Make items grow on different screens | |
| Shrink | ||
.flex-*-shrink-0 |
Don't make the items shrink on diferent screens | |
.flex-*-shrink-1 |
Make items shrink on different screens | |
| Order | ||
.order-*-0-12 |
Change the order from 0 to 12 on small screens | Try it |
| Wrap | ||
.flex-*-nowrap |
Don't wrap items on different screens | Try it |
.flex-*-wrap |
Wrap items on different screens | Try it |
.flex-*-wrap-reverse |
Reverse the wrapping of items on different screens | Try it |
| Align Content | ||
.align-content-*-start |
Align gathered items from the start on different screens | Try it |
.align-content-*-end |
Align gathered items at the end on different screens | Try it |
.align-content-*-center |
Align gathered items in the center on different screens | Try it |
.align-content-*-around |
Align gathered items "around" on different screens | Try it |
.align-content-*-stretch |
Stretch gathered items on different screens | Try it |
| Align Items | ||
.align-items-*-start |
Align single rows of items from the start on different screens | Try it |
.align-items-*-end |
Align single rows of items at the end on different screens | Try it |
.align-items-*-center |
Align single rows of items in the center on different screens | Try it |
.align-items-*-baseline |
Align single rows of items on the baseline on different screens | Try it |
.align-items-*-stretch |
Stretch single rows of items on different screens | Try it |
| Align Self | ||
.align-self-*-start |
Align a flex item from the start on different screens | Try it |
.align-self-*-end |
Align a flex item at the end on different screens | Try it |
.align-self-*-center |
Align a flex item in the center on different screens | Try it |
.align-self-*-baseline |
Align a flex item on the baseline on different screens | Try it |
.align-self-*-stretch |
Stretch a flex item on different screens | Try it |
