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98 lines
3.4 KiB
Markdown
98 lines
3.4 KiB
Markdown
---
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layout: docs
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title: Migrating to v5
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description: Track and review changes to the Bootstrap source files, documentation, and components to help you migrate from v4 to v5.
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group: migration
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aliases: "/migration/"
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toc: true
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---
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## Browser support
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See the browser and devices page for details on what is currently supported in Bootstrap 5. Since v4, here's what's changed to our browser support:
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- Dropped support for Internet Explorer NN
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- Dropped support for Firefox NN - MM
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- Dropped support for Safari NN
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- Dropped support for iOS Safari NN
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- Dropped support for Chrome NN
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- Dropped support for Android NN
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## Sass
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Changes to our source Sass files and compiled CSS.
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- Removed `hover`, `hover-focus`, `plain-hover-focus`, and `hover-focus-active` mixins. Use regular CSS syntax for these moving forward. [See #28267](https://github.com/twbs/bootstrap/pull/28267).
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- **Todo:** Remove previously deprecated mixins
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- `float()`
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- `form-control-mixin()`
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- `retina-img()`
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- `text-hide()` (also dropped the associated utility class, `.text-hide`)
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- `visibility()`
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- **Todo:** New variables?
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- **Todo:** Rearrange forms source files (under `scss/forms/`)
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- **Todo:** Rearrange grid source files (under `scss/grid/`)
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- Removed print styles and `$enable-print-styles` variable. Print display classes, however, have remained intact. [See #28339](https://github.com/twbs/bootstrap/pull/28339).
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## JavaScript
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Changes to our source and compiled JavaScript files.
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- Dropped jQuery dependency and rewrote plugins to be in regular JavaScript.
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## Grid and layout
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Changes to any layout tools and our grid system.
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- Dropped `.media` component as it can be built with utility classes. [See #28265](https://github.com/twbs/bootstrap/pull/28265).
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- **Todo:** Remove `position: relative` from grid columns
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- **Todo:** Integrate CSS grid into our grid system
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## Content, Reboot, etc
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Changes to Reboot, typography, tables, and more.
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- **Todo:** Make RFS enabled by default
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## Forms
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- **Todo:** Move forms documentation to it's own top-level section
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- **Todo:** Rearrange source Sass files (under `scss/forms/`)
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- **Todo:** Combine native and custom checkboxes and radios
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- **Todo:** Rewrite checks to support sizing (via `em`/`font-size` or explicit modifier classes)
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- **Todo:** Combine native and custom selects
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- **Todo:** Combine native and custom file and range inputs
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## Components
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### Alerts
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- **Todo:** Remove auto-darkening of `<hr>` elements in `.alert-*` class variants. `<hr>`s use `rgba()` for their color, so these should naturally blend anyway.
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### Badges
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Badges were overhauled to better differentiate themselves from buttons and to better utilize utility classes.
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- **Todo:** Removed and replaced `.badge` modifier classes with background utility classes (e.g., use `.bg-primary` instead of `.badge-primary`)
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- **Todo:** Removed `.badge-pill` for the `.rounded-pill` utility class
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- **Todo:** Removed badge's hover and focus styles for `a.badge` and `button.badge`.
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### Popovers
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- Renamed `.arrow` to `.popover-arrow`
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### Tooltips
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- Renamed `.arrow` to `.tooltip-arrow`
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## Accessibility
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- `.sr-only-focusable` does not require `.sr-only` anymore. [See #28720](https://github.com/twbs/bootstrap/pull/28720).
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## Utilities
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- **Todo:** Drop `.text-hide` as it's an antiquated method for hiding text that shouldn't be used anymore
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- **Todo:** Split utilities into property-value utility classes and helpers
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## Build tools
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