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Are Bootstrap 3 and Boostrap 4 - alpha versions currently backward compatible?

I try to substitute Bootstrap 3 by a new alpha version, but the result styles are broken. Am I doing something wrong or it is a common problem?

Carol Skelly
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Anton Lyhin
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    Only parts of each major release are backwards compatible. For the most part, if you're upgrading or downgrading your Bootstrap version, it's going to require a rewrite of your pages. – APAD1 Feb 01 '16 at 21:51
  • That is so pity that browsers have not implemented scoped css feature yet :'-( – Anton Lyhin Feb 01 '16 at 22:14
  • Why would Bootstrap 4 be backwards compatible? As far as I know, no major updates have been backwards compatible. It's just not important. And oh how unfortunate that has been. – Jonathan Wood Jan 14 '17 at 04:13
  • Here's a 3 to 4.x migration tool that may help: http://upgrade-bootstrap.bootply.com/ – Carol Skelly Feb 01 '17 at 21:37

1 Answers1

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Bootstrap 4 is not backward compatible with Bootstrap 3. For more information see the official Guidance on how to upgrade from Bootstrap v3.x to v4.x.

Eran Shabi
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