---
layout: docs
title: Contents
description: Discover what's included in Bootstrap, including our precompiled and source code flavors.
group: getting-started
toc: true
---
## Precompiled Bootstrap
Once downloaded, unzip the compressed folder and you'll see something like this:
{{< highlight text >}}
bootstrap/
├── css/
│ ├── bootstrap-grid.css
│ ├── bootstrap-grid.css.map
│ ├── bootstrap-grid.min.css
│ ├── bootstrap-grid.min.css.map
│ ├── bootstrap-reboot.css
│ ├── bootstrap-reboot.css.map
│ ├── bootstrap-reboot.min.css
│ ├── bootstrap-reboot.min.css.map
│ ├── bootstrap-utilities.css
│ ├── bootstrap-utilities.css.map
│ ├── bootstrap-utilities.min.css
│ ├── bootstrap-utilities.min.css.map
│ ├── bootstrap.css
│ ├── bootstrap.css.map
│ ├── bootstrap.min.css
│ └── bootstrap.min.css.map
└── js/
├── bootstrap.bundle.js
├── bootstrap.bundle.js.map
├── bootstrap.bundle.min.js
├── bootstrap.bundle.min.js.map
├── bootstrap.esm.js
├── bootstrap.esm.js.map
├── bootstrap.esm.min.js
├── bootstrap.esm.min.js.map
├── bootstrap.js
├── bootstrap.js.map
├── bootstrap.min.js
└── bootstrap.min.js.map
{{< /highlight >}}
This is the most basic form of Bootstrap: precompiled files for quick drop-in usage in nearly any web project. We provide compiled CSS and JS (`bootstrap.*`), as well as compiled and minified CSS and JS (`bootstrap.min.*`). [source maps](https://developers.google.com/web/tools/chrome-devtools/javascript/source-maps) (`bootstrap.*.map`) are available for use with certain browsers' developer tools. Bundled JS files (`bootstrap.bundle.js` and minified `bootstrap.bundle.min.js`) include [Popper](https://popper.js.org/).
## CSS files
Bootstrap includes a handful of options for including some or all of our compiled CSS.
CSS files |
Layout |
Content |
Components |
Utilities |
bootstrap.css
bootstrap.min.css
|
Included |
Included |
Included |
Included |
bootstrap-grid.css
bootstrap-grid.min.css
|
}}">Only grid system |
— |
— |
}}">Only flex utilities |
bootstrap-utilities.css
bootstrap-utilities.min.css
|
— |
— |
— |
Included |
bootstrap-reboot.css
bootstrap-reboot.min.css
|
— |
}}">Only Reboot |
— |
— |
## JS files
Similarly, we have options for including some or all of our compiled JavaScript.
JS files |
Popper |
bootstrap.bundle.js
bootstrap.bundle.min.js
|
Included |
bootstrap.js
bootstrap.min.js
|
— |
## Bootstrap source code
The Bootstrap source code download includes the precompiled CSS and JavaScript assets, along with source Sass, JavaScript, and documentation. More specifically, it includes the following and more:
{{< highlight text >}}
bootstrap/
├── dist/
│ ├── css/
│ └── js/
├── site/
│ └──content/
│ └── docs/
│ └── 4.3/
│ └── examples/
├── js/
└── scss/
{{< /highlight >}}
The `scss/` and `js/` are the source code for our CSS and JavaScript. The `dist/` folder includes everything listed in the precompiled download section above. The `site/docs/` folder includes the source code for our documentation, and `examples/` of Bootstrap usage. Beyond that, any other included file provides support for packages, license information, and development.