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---
name: Bug report
about: Tell us about a bug you may have identified in Bootstrap.
---
Before opening:
- [Search for duplicate or closed issues ](https://github.com/twbs/bootstrap/issues?utf8=%E2%9C%93&q=is%3Aissue )
- [Validate ](https://html5.validator.nu/ ) and [lint ](https://github.com/twbs/bootlint#in-the-browser ) any HTML to avoid common problems
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- Read the [contributing guidelines ](https://github.com/twbs/bootstrap/blob/master/.github/CONTRIBUTING.md )
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Bug reports must include:
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- Operating system and version (Windows, macOS, Android, iOS)
- Browser and version (Chrome, Firefox, Safari, Microsoft Edge, Opera, Android Browser)
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- [Reduced test case ](https://css-tricks.com/reduced-test-cases/ ) and suggested fix using [CodePen ](https://codepen.io/ ) or [JS Bin ](https://jsbin.com/ )
