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  1. Before opening an issue:
  2. - [Search for duplicate or closed issues](https://github.com/twbs/bootstrap/issues?utf8=%E2%9C%93&q=is%3Aissue)
  3. - [Validate](http://validator.w3.org/nu/) and [lint](https://github.com/twbs/bootlint#in-the-browser) any HTML to avoid common problems
  4. - Prepare a [reduced test case](https://css-tricks.com/reduced-test-cases/) for any bugs
  5. - Read the [contributing guidelines](https://github.com/twbs/bootstrap/blob/master/CONTRIBUTING.md)
  6. When asking general "how to" questions:
  7. - Please do not open an issue here
  8. - Instead, ask for help on [StackOverflow, IRC, or Slack](https://github.com/twbs/bootstrap/blob/master/README.md#community)
  9. When reporting a bug, include:
  10. - Operating system and version (Windows, Mac OS X, Android, iOS, Win10 Mobile)
  11. - Browser and version (Chrome, Firefox, Safari, IE, MS Edge, Opera 15+, Android Browser)
  12. - Reduced test cases and potential fixes using [JS Bin](https://jsbin.com)
  13. When suggesting a feature, include:
  14. - As much detail as possible for what we should add and why it's important to Bootstrap
  15. - Relevant links to prior art, screenshots, or live demos whenever possible