Containers
Containers are required when using the default grid system. While containers can be nested, most layouts do not require a nested container.
How they work
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 |
Small ≥576px |
Medium ≥768px |
Large ≥992px |
X-Large ≥1260px |
XX-Large ≥1400px |
|
|---|---|---|---|---|---|---|
.container |
100% | 540px | 720px | 960px | 1200px | 1320px |
.container-sm |
100% | 540px | 720px | 960px | 1200px | 1320px |
.container-md |
100% | 100% | 720px | 960px | 1200px | 1320px |
.container-lg |
100% | 100% | 100% | 960px | 1200px | 1320px |
.container-xl |
100% | 100% | 100% | 100% | 1200px | 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.
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-widths 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.
Fluid containers
Use .container-fluid for a full width container, spanning the entire width of the viewport.
Sass
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:
In addition to customizing the Sass, you can also create your own containers with our Sass mixin.
For more information and examples on how to modify our Sass maps and variables, please refer to the Sass section of the Grid documentation.