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Bootstrap/site/content/docs/4.3/migration.md
Mark Otto aaf03bdc9e
v5: Forms update (#28450)
* Initial spike of consolidated form checks

* Stub out forms rearrangement

- Prepping to drop non-custom file and range inputs
- Prepping to merge custom and native checks and radios (with switches)
- Prepping to merge custom select with form select
- Moving docs arround so forms has it's own area given volume of CSS

* Move input group Sass file to forms subdir

* Start to split and move the docs around

* Simpler imports

* Copyediting

* delete overview file

* Remove commented out code

* remove the custom-forms import

* rewrite flex-check as form-check, replace all custom properties

* Remove old forms doc

* stub out new subpage link section

* update migration guide

* Update nav, forms overview in page nav, and descriptions

* fix check bg position

* fix margin-top calculation

* rename .custom-select to .form-select

* Update validation styles for new checks

* add some vertical margin, fix inline checks

* fix docs examples

* better way to do this contents stuff, redo the toc while i'm at it

* page restyle for docs while here

* un-callout that, edit text

* redo padding on toc

* fix toc

* start to cleanup checks docs

* Rewrite Markdown tables into HTML

* Redesign tables, redo their docs

* Replace Open Iconic icons with custom Bootstrap icons

* Redesign the docs navbar, add a subheader, redo the sidebar

* Redesign docs homepage a bit

* Simplify table style overrides for docs tables

* Simplify docs typography for page titles and reading line length

* Stub out icons page

* Part of sidebar update, remove migration from nav.yml

* Move toc CSS to separate partial

* Change appearance of overview page

* fix sidebar arrow direction

* Add footer to docs layout

* Update descriptions

* Drop the .form-group class for margin utilities

* Remove lingering form-group-margin-bottom var

* improve footer spacing

* add headings to range page

* uncomment form range css

* Rename .custom-range to .form-range

* Drop unused docs var

* Uncomment the comment

* Remove unused variable

* Fix radio image sizing

* Reboot update: reset horizontal ul and ol padding

* de-dupe IDs

* tweak toc styles

* nvm, fix dropdown versions stuff

* remove sidebar nav toggle for now

* broken html

* fix more broken html, move css

* scss linting

* comment out broken helper docs

* scope styles

* scope styles

* Fixes #25540 and fixes #26407 for v5 only

* Update sidebar once more

* Match new sidenav order

* fix syntax error

* Rename custom-file to form-file, update paths, update migration docs for previous changes in #28696

* rename back

* fix size and alignment

* rename that back too
2019-07-12 16:52:33 -05:00

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Markdown

---
layout: docs
title: Migrating to v5
description: Track and review changes to the Bootstrap source files, documentation, and components to help you migrate from v4 to v5.
group: migration
aliases: "/migration/"
toc: true
---
## Browser support
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:
- Dropped support for Internet Explorer NN
- Dropped support for Firefox NN - MM
- Dropped support for Safari NN
- Dropped support for iOS Safari NN
- Dropped support for Chrome NN
- Dropped support for Android NN
## Sass
Changes to our source Sass files and compiled CSS.
- 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).
- **Todo:** Remove previously deprecated mixins
- `float()`
- `form-control-mixin()`
- `retina-img()`
- `text-hide()` (also dropped the associated utility class, `.text-hide`)
- `visibility()`
- **Todo:** New variables?
- **Todo:** Rearrange forms source files (under `scss/forms/`)
- **Todo:** Rearrange grid source files (under `scss/grid/`)
- Removed print styles and `$enable-print-styles` variable. Print display classes, however, have remained intact. [See #28339](https://github.com/twbs/bootstrap/pull/28339).
## JavaScript
Changes to our source and compiled JavaScript files.
- Dropped jQuery dependency and rewrote plugins to be in regular JavaScript.
## Grid and layout
Changes to any layout tools and our grid system.
- Dropped `.media` component as it can be built with utility classes. [See #28265](https://github.com/twbs/bootstrap/pull/28265).
- **Todo:** Remove `position: relative` from grid columns
- **Todo:** Integrate CSS grid into our grid system
## Content, Reboot, etc
Changes to Reboot, typography, tables, and more.
- **Todo:** Make RFS enabled by default
- Reset default horizontal `padding` on `<ul>` and `<ol>` elements from browser default `40px` to `2rem`.
## Forms
- Rearranged form documentation under its own top-level section.
- Split out old Forms page into several subpages
- Moved input groups docs under new Forms section
- Rearranged source Sass files under `scss/forms/`, including moving over input group styles.
- Combined native and custom checkboxes and radios into single `.form-check` class.
- New checks support sizing via `em`/`font-size` or explicit modifier classes now.
- Dropped `.custom-control` and associated classes.
- Combined native and custom selects into `.form-select`.
- Dropped `.custom-select` and associated classes.
- Dropped native `.form-control-file` and `.form-control-range` components.
- Renamed `.custom-file` to `.form-file` (including variables).
- Refactored `.form-file` markup to resolve some visual bugs while allowing translation and button text changes via HTML instead of CSS.
- Renamed `.custom-range` to `.form-range` (including variables).
- Dropped `.form-group` for margin utilities (we've replaced our docs examples with `.mb-3`).
- Dropped support for `.form-control-plaintext` inside `.input-group`s.
## Components
### Alerts
- **Todo:** Remove auto-darkening of `<hr>` elements in `.alert-*` class variants. `<hr>`s use `rgba()` for their color, so these should naturally blend anyway.
### Badges
Badges were overhauled to better differentiate themselves from buttons and to better utilize utility classes.
- **Todo:** Removed and replaced `.badge` modifier classes with background utility classes (e.g., use `.bg-primary` instead of `.badge-primary`)
- **Todo:** Removed `.badge-pill` for the `.rounded-pill` utility class
- **Todo:** Removed badge's hover and focus styles for `a.badge` and `button.badge`.
### Jumbotron
- The jumbotron component is removed in favor of utility classes like `.bg-light` for the background color and `.p-*` classes to control padding.
### Popovers
- Renamed `.arrow` to `.popover-arrow`
### Tooltips
- Renamed `.arrow` to `.tooltip-arrow`
## Accessibility
- `.sr-only-focusable` does not require `.sr-only` anymore. [See #28720](https://github.com/twbs/bootstrap/pull/28720).
## Utilities
- Renamed `.text-monospace` to `.font-monospace`
- Decreased the number of responsive order utilities per breakpoint. The highest order utility with a number now is `.order-5` instead of `.order-12`. [See #28874](https://github.com/twbs/bootstrap/pull/28874).
- **Todo:** Drop `.text-hide` as it's an antiquated method for hiding text that shouldn't be used anymore
- **Todo:** Split utilities into property-value utility classes and helpers
## Build tools