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This is the primary pull request for developing and shipping Bootstrap 4. You should know a few things coming into this:
Heads up! This thread has been locked to contributors. Please use issues for questions, comments, and feedback about particular changes. We'll cross reference them here as they come up.
Read the v4 alpha announcement blog post for more details on these changes and some of the open questions we still have to answer.
We've got a number of big changes coming in v4. To name a few:
We also have some super ambitious nice to haves:
What about v3?
We will continue to support Bootstrap 3, but only for critical bug fixes and documentation updates. No new features will be added, and nothing will be removed. If you need IE8 support, Bootstrap 3 has your back (or you can go out of your way to re-implement it in v4).
Be aware that we will set a reasonable date in the future to completely discontinue v3 support.
Here's the breakdown by feature/component of the updates we've made to v4, as well as some that are still todo.
Variables and mixins
Validation and states