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Bootstrap/site/content/docs/4.3/migration.md

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---
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
2014-12-17 05:31:36 +01:00
---
## 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).
2019-08-21 10:33:26 +02:00
- Remove previously deprecated mixins
- `float()`
- `form-control-mixin()`
2019-08-21 10:33:26 +02:00
- `nav-divider()`
- `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 `$enable-print-styles` variable. Print display classes, however, have remained intact. [See #28339](https://github.com/twbs/bootstrap/pull/28339).
- Dropped `color()`, `theme-color()` & `gray()` functions in favor of variables. [See #29083](https://github.com/twbs/bootstrap/pull/29083)
- The `theme-color-level()` function is renamed to `color-level()` and now accepts any color you want instead of only `$theme-color` colors. [See #29083](https://github.com/twbs/bootstrap/pull/29083)
- Line heights are dropped from several components to simplify our codebase. The `button-size()` and `pagination-size()` do not accept line height parameters anymore. [See #29271](https://github.com/twbs/bootstrap/pull/29271)
## JavaScript
Changes to our source and compiled JavaScript files.
- Dropped jQuery dependency and rewrote plugins to be in regular JavaScript.
2019-07-29 11:17:42 +02:00
- Removed underscore from public static methods like `_getInstance()``getInstance()`.
## Grid and layout
Changes to any layout tools and our grid system.
2019-05-08 20:45:24 +02:00
- 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-left` on `<ul>` and `<ol>` elements from browser default `40px` to `2rem`.
2019-07-15 18:53:10 +02:00
- Simplified table styles (no more 2px border on `thead > th` elements) and tightened cell padding.
- Dropped `.pre-scrollable` class. [See #29135](https://github.com/twbs/bootstrap/pull/29135)
- `.text-*` utilities do not add hover and focus states to links anymore. `.link-*` helper classes can be used instead. [See #29267](https://github.com/twbs/bootstrap/pull/29267)
## Forms
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 23:52:33 +02:00
- 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.
- New checks now appear larger by default for improved usability.
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 23:52:33 +02:00
- Dropped `.custom-control` and associated classes.
- Renamed most `$custom-control` variables to `$form-control` ones.
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 23:52:33 +02:00
- Combined native and custom selects into `.form-select`.
- Dropped `.custom-select` and associated classes.
- Renamed most `$custom-select` variables to `$form-select` ones.
- Updated file input component with same overall design, but improved HTML.
- Refactored `.form-file` markup to resolve some visual bugs while allowing translation and button text changes via HTML instead of CSS.
- Dropped native `.form-control-file` and `.form-control-range` components entirely.
- Renamed `.custom-file` to `.form-file` (including variables).
- Added support for `:focus` and `:disabled` styles.
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 23:52:33 +02:00
- 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
2017-09-26 13:50:35 +02:00
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`.
2017-08-22 19:56:04 +02:00
### Cards
- Removed the card columns in favor of a Masonry grid [See #28922](https://github.com/twbs/bootstrap/pull/28922).
### Icons (New!)
- Added new Bootstrap icons to the project for our documentation, form controls, and more.
- Removed Open Iconic icons from project source code for form controls.
### Jumbotron
- The jumbotron component is removed in favor of utility classes like `.bg-light` for the background color and `.p-*` classes to control padding.
### Pagination
- Pagination links now have customizable `margin-left` that are dynamically rounded on all corners when separated from one another.
2019-05-12 10:01:13 +02:00
### 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).
- New `line-height` utilities: `.lh-1`, `.lh-sm`, `.lh-base` and `.lh-lg`. See [here]({{< docsref "/utilities/text#line-height" >}}).
- **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
2017-08-22 19:56:04 +02:00
## Docs
- Removed "Wall of browser bugs" page because it has become obsolete
## Build tools