Containers
Containers are a fundamental building block of Bootstrap that contain, pad, and align your content within a given device or viewport.
How they work
Containers are the most basic layout element in Bootstrap and are required when using our default grid system. Containers are used to contain, pad, and (sometimes) center the content within them. While containers can be nested, most layouts do not require a nested container.
Bootstrap comes with three different containers:
.container
, which sets amax-width
at each responsive breakpoint.container-{breakpoint}
, which iswidth: 100%
until the specified breakpoint.container-fluid
, which iswidth: 100%
at all breakpoints
The table below illustrates how each container’s max-width
compares to the original .container
and .container-fluid
across each breakpoint.
See them in action and compare them in our Grid example.
Extra small <576px |
Klein ≥576px |
Medium ≥768px |
Large ≥992px |
X-Large ≥1200px |
XX-Large ≥1400px |
|
---|---|---|---|---|---|---|
.container |
100% | 540px | 720px | 960px | 1140px | 1320px |
.container-sm |
100% | 540px | 720px | 960px | 1140px | 1320px |
.container-md |
100% | 100% | 720px | 960px | 1140px | 1320px |
.container-lg |
100% | 100% | 100% | 960px | 1140px | 1320px |
.container-xl |
100% | 100% | 100% | 100% | 1140px | 1320px |
.container-xxl |
100% | 100% | 100% | 100% | 100% | 1320px |
.container-fluid |
100% | 100% | 100% | 100% | 100% | 100% |
Default container
Our default .container
class is a responsive, fixed-width container, meaning its max-width
changes at each breakpoint.
<div class="container">
<!-- Content here -->
</div>
Responsive containers
Responsive containers allow you to specify a class that is 100% wide until the specified breakpoint is reached, after which we apply max-width
s for each of the higher breakpoints. For example, .container-sm
is 100% wide to start until the sm
breakpoint is reached, where it will scale up with md
, lg
, xl
, and xxl
.
<div class="container-sm">100% wide until small breakpoint</div>
<div class="container-md">100% wide until medium breakpoint</div>
<div class="container-lg">100% wide until large breakpoint</div>
<div class="container-xl">100% wide until extra large breakpoint</div>
<div class="container-xxl">100% wide until extra extra large breakpoint</div>
Fluid containers
Use .container-fluid
for a full width container, spanning the entire width of the viewport.
<div class="container-fluid">
...
</div>
CSS
Sass variables
As shown above, Bootstrap generates a series of predefined container classes to help you build the layouts you desire. You may customize these predefined container classes by modifying the Sass map (found in _variables.scss
) that powers them:
$container-max-widths: (
sm: 540px,
md: 720px,
lg: 960px,
xl: 1140px,
xxl: 1320px
);
For more information and examples on how to modify our Sass maps and variables, please refer to the Sass section of the Grid documentation.
Sass mixins
In addition to customizing the Sass, you can also create your own containers with our Sass mixin.
// Source mixin
@mixin make-container($padding-x: $container-padding-x) {
width: 100%;
padding-right: $padding-x;
padding-left: $padding-x;
margin-right: auto;
margin-left: auto;
}
// Usage
.custom-container {
@include make-container();
}