# Bootstrap v4 utility classes

> Bootstrap v4 CSS provides various utility classes to control color, spacing, flex-box, text
> alignment, floating, position, responsive display/hiding and much more.

## External references

The following are convenience links to Bootstrap v4's documentation:

- [Border utilities](https://getbootstrap.com/docs/4.5/utilities/borders/)
- [Clearfix utilities](https://getbootstrap.com/docs/4.5/utilities/clearfix/)
- [Close icon utilities](https://getbootstrap.com/docs/4.5/utilities/close-icon/)
- [Color utilities](https://getbootstrap.com/docs/4.5/utilities/colors/)
- [Display utilities](https://getbootstrap.com/docs/4.5/utilities/display/)
- [Embed utilities](https://getbootstrap.com/docs/4.5/utilities/embed/)
- [Flex utilities](https://getbootstrap.com/docs/4.5/utilities/flex/)
- [Float utilities](https://getbootstrap.com/docs/4.5/utilities/float/)
- [Image replacement utilities](https://getbootstrap.com/docs/4.5/utilities/image-replacement/)
- [Overflow utilities](https://getbootstrap.com/docs/4.5/utilities/overflow/)
- [Position utilities](https://getbootstrap.com/docs/4.5/utilities/position/)
- [Screen reader utilities](https://getbootstrap.com/docs/4.5/utilities/screen-readers/)
- [Shadow utilities](https://getbootstrap.com/docs/4.5/utilities/shadows/)
- [Sizing utilities](https://getbootstrap.com/docs/4.5/utilities/sizing/)
- [Spacing utilities](https://getbootstrap.com/docs/4.5/utilities/spacing/)
- [Stretched link utilities](https://getbootstrap.com/docs/4.5/utilities/stretched-link/)
- [Text utilities](https://getbootstrap.com/docs/4.5/utilities/text/)
- [Vertical align utilities](https://getbootstrap.com/docs/4.5/utilities/vertical-align/)
- [Visibility utilities](https://getbootstrap.com/docs/4.5/utilities/visibility/)

Bootstrap v4 also has defined typography styles and classes for various native HTML elements. You
can find out more at the following links:

- [Reboot](https://getbootstrap.com/docs/4.5/content/reboot/)
- [Typography](https://getbootstrap.com/docs/4.5/content/typography/)
- [Code](https://getbootstrap.com/docs/4.5/content/code/)
- [Figures](https://getbootstrap.com/docs/4.5/content/figures/)
