Bootstrap v4.0 的進度【241/366】

  • 2015.08.19 – Bootstrap 4 alpha 1
  • 2015.12.08 – Bootstrap 4 alpha 2
  • 2016.07.27 – Bootstrap 4 Alpha 3

官方也有說到

The general development and release plan looks something like this:

  • A few alpha releases while things are still in flux.
  • Two beta releases after features and functionality are locked down to really test things out.
  • Two release candidates (RCs) to really test things out closer to production environments.
  • Then, the final release!

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