Before opening:

- [Search for duplicate or closed issues](https://github.com/twbs/bootstrap/issues?utf8=%E2%9C%93&q=is%3Aissue)
- Read the [contributing guidelines](https://github.com/twbs/bootstrap/blob/master/.github/CONTRIBUTING.md)

Feature requests must include:

- As much detail as possible for what we should add and why it's important to Bootstrap
- Relevant links to prior art, screenshots, or live demos whenever possible