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Bootstrap 4 Beta 2

Bootstrap 4 Beta 2

Just over two months ago we shipped our first beta for Bootstrap 4, and now we’re ready to share our second with you. We’ve improved customization, documentation, build tooling, and naming inconsistencies all while fixing hella bugs.

We’ve done our best to prevent breaking changes, but we had to sneak some in. Regrettably, we’ll also have a few more coming in Beta 3, too. However, we’re clearly outlining all of them for you to make the upgrade and testing process as easy as possible.

Let’s start with the good news though—Beta 2 is here!

Highlights

We’ve pushed over 500 commits in our two months, so we have a few changes since Beta 1 to highlights to share with you.

Improved theming

Bootstrap Theming docs page

We have a brand new Theming docs page to replace our old Options page (we’ll automatically redirect folks from the old page). This new page delves into the structure of our Sass files, default variables and customizing them, maps and loops we use, functions, colors, and of course or global Sass options. It also includes a new section to explain how we build our components via Sass maps and loops, specifically our modifier classes (e.g.,.btn-danger).

In addition to the documentation changes, we’ve made a few CSS changes to improve how folks interact with our theming options.

  • We’ve added new theme color variables in addition to the map. Instead of Now you can use $primary or theme-color("primary") as needed. The values in $theme-colors are also now mapped to these new variables instead of their direct color.

  • We’ve improved the ability to customize Sass maps. With Beta 1, we didn’t have a setup in place to modify your $theme-colors map without replacing it wholesale. That’s been fixed in Beta 2—override existing values and add more as needed. Our new Theming docs page will show you how it’s done.

Lastly, our $enable-shadows and $enable-gradients Sass variables have finally been updated and integrated into several of our components. Now, when you enable those variables (both are false by default) and recompile, you’ll see subtle gradients and shadows across alerts, buttons, carousels, custom form controls, and dropdown items.

Themed buttons

And when you use $enable-gradients, you’ll enable the new .bg-gradient- utilities (disabled by default) for use in navbars and more.

Themed backgrounds

Check it out and please share any feedback in an issue.

Offset grid classes

We brought them back! Prematurely removed ahead of Beta 1, we underestimated the appeal of the .offset- classes for our grid system. Auto margins are simply not enough for y’all. The styles have been restored and our grid docs have been updated. Enjoy!

Updated migration docs

Given our handful of breaking changes since Beta 1, we added a new section to our migration docs page to detail exactly what we changed that might be broken for you. We had to rename a few classes here and there to ensure everything’s consistent with the rest of the project.

We’ll be updating this page again for Beta 3 in the same way.

And more!

  • Introduced new pointer-events usage on modals. The outer .modal-dialog passes through events with pointer-events: none for custom click handling (making it possible to just listen on the .modal-backdrop for any clicks), and then counteracts it for the actual .modal-content with pointer-events: auto.
  • Responsive tables now generate classes for each grid breakpoint, meaning we’ve added .table-responsive-{sm,md,lg,xl} to the already present .table-responsive. You might need to adjust your usage depending on when you want a table to resize.
  • Remove unnecessary color from .badge, and it’s associated $badge-color variable.
  • Include two new dist files which contain Popper.js insidebootstrap.bundle.js and bootstrap.bundle.min.js.
  • Dropped support for Bower as they’ve deprecated the package manager.
  • Switched breadcrumbs from float to flexbox.
  • Switched to Stylelint for our CSS linting needs.
  • We’re now outputting a handful of CSS variables in our compiled CSS for easy prototyping and customizing with our dist files.
  • Changed the color-yiq from a mixin that included the color property to a function that returns a value, allowing you to use it for any CSS property.

Coming in Beta 3

Beta 3 is up next for us and already have a GitHub project board setup to track issues and PRs. Beyond the standard docs improvements and bug fixes, there are a few issues and PRs that are of mind for us:

Be sure to follow those issues and PRs if you’re interested in when the merge to our v4-dev branch.

Getting to v4 Final

After Beta 3, we’re hoping to quickly move into a final v4 release. Ideally it’ll also be a smoother and more focused release than the Alpha 6 to Beta 1 move. We heard from a lot of you that the delta between those two releases was too great.Source via Bootstrap blog

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