Update dependency govuk-frontend to v5

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
govuk-frontend (source)	4.8.0 -> 5.7.1

---

Release Notes

alphagov/govuk-frontend (govuk-frontend)

v5.7.1

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To install this version with npm, run npm install [email protected]. You can also find more information about how to stay up to date in our documentation.

Recommended changes

Stop setting a value for File upload components

The File upload component currently supports a value parameter, which populates the value HTML attribute of the input.

However, since no modern browser supports passing a value to a file input, we've made the decision to remove this parameter. It has been deprecated and will be removed in a future version of GOV.UK Frontend.

We introduced this change in pull request #​5330: Deprecate File upload component's value parameter.

Fixes

We've made fixes to GOV.UK Frontend in the following pull requests:

• #​5396: Update various department brand colours

v5.7.0

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To install this version with npm, run npm install [email protected]. You can also find more information about how to stay up to date in our documentation.

New features

The Royal Arms has been updated

The Royal Arms in the GOV.UK footer has been updated to reflect the version introduced by King Charles III.

If your service does not use the image directly from the Frontend package, you should ensure the new image is being copied to your service’s image assets folder. By default this folder is located at /assets/images.

If you’re using Nunjucks, the asset path may have been changed by the assetPath global variable or assetsPath parameter on the header component.

Copy the govuk-crest.svg file from /dist/assets/images into your assets folder.

You can safely delete the old image files, named govuk-crest.png and govuk-crest-2x.png.

We introduced this change in pull request #​5376: Update the Royal Arms graphic in footer (v5.x).

Components will not longer initialise twice on the same element

GOV.UK Frontend components now throw an error if they've already been initialised on the DOM Element they're receiving for initialisation.
This prevents components from being initialised more than once and therefore not working properly.

We introduced this change in pull request #​5272: Prevent multiple initialisations of a single component instance

Respond to initialisation errors when using createAll and initAll

We've added a new onError option for createAll and initAll that lets you respond to initialisation errors.
The functions will continue catching errors and initialising components further down the page if one component fails to initialise,
but this option will let you react to a component failing to initialise. For example, to allow reporting to an error monitoring service.

We introduced this change in:

• pull request #​5252: Add onError to createAll
• pull request #​5276: Add onError to initAll

Check if GOV.UK Frontend is supported

We've added the isSupported function to let you check if GOV.UK Frontend is supported in the browser running your script.
GOV.UK Frontend components have been checking this automatically since the release of v5.0.0, but you may want to use the isSupported function to avoid running some code when GOV.UK Frontend is not supported.

We introduced this change in pull request #​5250: Add isSupported to all.mjs

Use our base component to build your own components

We've added a Component class to help you build your own components. It allows you to focus on your components' specific features by handling these shared behaviours across components:

• checking that GOV.UK Frontend is supported
• checking that the component is not already initialised on its root element
• checking the type of the root element and storing it for access within the component as this.$root

We introduced this change in:

• pull request #​5350: Export a base Component class.
• pull request #​5354: Refactor the root type check in GOVUKFrontendComponent

New brand colour

We've added a brand colour for the Serious Fraud Office in pull request #​5389.

Fixes

We've made fixes to GOV.UK Frontend in the following pull requests:

• #​5278: Fix service navigation mobile toggle spacing
• #​5331: Fix Warning Text font weight when <strong> styles are reset
• #​5352: Only apply margin to details summary when open
• #​5089: Fix details expanded state not announced on iOS
• #​5332: Improve how licence description wraps in the footer

v5.6.0

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To install this version with npm, run npm install [email protected]. You can also find more information about how to stay up to date in our documentation.

New features

Make it easier to navigate complex services with the Service navigation component

We've added a new Service navigation component to help users to navigate services with multiple top-level sections. This replaces the navigation functions of the Header component, which will be deprecated in a future release of GOV.UK Frontend.

This component includes some features we consider experimental. We intend to iterate these features in response to user feedback. These are:

• moving the service name from the Header to the Service navigation
• providing slots for injecting custom HTML into specified locations within the component

We introduced this change in pull request #​5206: Service navigation component.

v5.5.0

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To install this version with npm, run npm install [email protected]. You can also find more information about how to stay up to date in our documentation.

New features

We've updated the list of organisations and brand colours included in Frontend

We've overhauled the list of organisations and organisation brand colours that are shipped with GOV.UK Frontend.

The previous list was outdated and had not kept up with changes to the machinery of government. We’ve updated the list to:

• add all current government departments and their brand colours
• add variants of brand colours that meet a 4.5:1 contrast ratio against white, where required
• provide warnings if defunct organisations are still being referenced in your Sass code

To enable these changes, set the feature flag variable $govuk-new-organisation-colours to true before you import GOV.UK Frontend in your Sass files:

// application.scss
$govuk-new-organisation-colours: true;
@​import "govuk-frontend/all";

You can also silence warnings about defunct organisations by adding organisation-colours to the $govuk-suppressed-warnings setting.

We introduced this change in pull request #​3407: Update organisation colours.

Stop long words breaking out of components with govuk-!-text-break-word

We've added a new override class to help display long words with no obvious break points when the space is too narrow to display them on one line. An example of a long word might be an email address entered by a user.

Wrapping the content with the govuk-!-text-break-word class forces words that are too long for the parent element to break onto a new line.

A confirmation email will be sent to <span class="govuk-!-text-break-word">arthur_phillip_dent.42@&#8203;peoplepersonalitydivision.siriuscyberneticscorporation.corp</span>.

Sass users can also use the govuk-text-break-word mixin.

We introduced this change in pull request #​5159: Add break-word typography helper.

Recommended changes

Update the $websafe parameter on the govuk-organisation-colour function

The govuk-organisation-colour Sass function's $websafe parameter has been renamed to $contrast-safe.

This is to more accurately describe the functionality of the parameter.

The old parameter name will stop working in the next major version of GOV.UK Frontend.

We introduced this change in pull request #​3407: Update organisation colours.

Fixes

We've made fixes to GOV.UK Frontend in the following pull requests:

• #​5046: Skip ‘empty’ tasks in the task list
• #​5066: Fix whitespace affecting text alignment in pagination block variant
• #​5158: Remove ↑ up and ↓ down arrow key bindings from tabs
• #​5191: Fix rendering of Back link's href and text for falsy values

v5.4.1

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Recommended changes

Update Breadcrumbs to use nav and aria-label

We've made changes to the Breadcrumbs component to improve how it appears to screen readers.

We've changed the wrapping element to use the nav tag to expose it as a navigational landmark, and added an aria-label attribute to differentiate it as breadcrumb navigation.

This change was introduced in pull request #​4995: Update Breadcrumb component to improve screen reader accessibility.

Fixes

We've made fixes to GOV.UK Frontend in the following pull requests:

• #​5114: Fix divider width for small checkboxes – thanks to @​colinrotherham
• #​5043: Refactor the accordion JavaScript
• #​5044: Remove session storage checks from accordion JavaScript
• #​5060: Reintroduce additional bottom margin to Error Summary content
• #​5070: Fix alignment of content in conditional checkboxes and radio buttons
• #​5090: Remove redundant tag CSS from phase banner

v5.4.0

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To install this version with npm, run npm install [email protected]. You can also find more information about how to stay up to date in our documentation.

This release includes new features to help you include only the components your service uses. Doing this can help reduce the size of the JavaScript and CSS files sent to users, improving their experience.

New features

Create individual components with createAll

We've added a new createAll function that lets you initialise specific components in the same way that initAll does.

The createAll function will:

• find all elements in the page with the corresponding data-module attribute
• instantiate a component object for each element
• catch errors and log them in the console
• return an array of all the successfully instantiated component objects.

import { createAll, Button, Checkboxes } from 'govuk-frontend'

createAll(Button)
createAll(Checkboxes)

You can also pass a config object and a scope within which to search for elements.

You can find out more about how to use the createAll function in our documentation.

This change was introduced in pull request #​4975: Add createAll function to initialise individual components.

Use tabular numbers easily with govuk-!-font-tabular-numbers

We've added a new override class for tabular number styling: govuk-!-font-tabular-numbers.

Using tabular numbers can make it easier for users to read numbers intended for comparison to one another, or for numbers that dynamically update.

It was previously only possible to use tabular numbers by using the govuk-font-tabular-numbers Sass mixin.

This change was introduced in pull request #​4973: Add override class for tabular numbers.

Deprecated features

Importing layers using all files

You'll see a warning when compiling your Sass if you import any of our layers using the all file. Importing using the all files is deprecated, and we’ll remove them in the next major release.

In your import statements, use a trailing /index rather than /all to load GOV.UK Frontend's files.
For example:

• @import "govuk/index"; instead of @import "govuk/all";;
• @import "govuk/<PATH>/index"; instead of @import "govuk/<PATH>/all";;

You do not need /index at the end of each import path if you’re using Dart Sass, LibSass 3.6.0 or higher, or Ruby Sass 3.6.0 or higher.

This change was introduced in pull request #​4955: Rename all files to index for our Sass entry points.

Fixes

We've made fixes to GOV.UK Frontend in the following pull requests:

• #​4942: Remove duplicate errorMessage argument for the password input component - thanks to Tim South for contributing this change
• #​4961: Fix tree-shaking when importing govuk-frontend
• #​4963: Fix input value not being set if the value was '0' – thanks to @​dwp-dmitri-algazin for reporting this issue
• #​4971: Fix Error Summary component outputting list HTML when no errorList is provided
• #​442: Update content to streamline installation info
• #​438: Split up the 'Import CSS, assets and JavaScript' page

v5.3.1

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To install this version with npm, run npm install [email protected]. You can also find more information about how to stay up to date in our documentation.

Fixes

We've made fixes to GOV.UK Frontend in the following pull requests:

• #​4906: Update the icon in the warning text component to match the defined text colour and background colour, rather than always being white on black
• #​4919: Use canvas colour for cookie banner over hardcoded grey
• #​4899: Remove indents from conditional reveals in radios and checkboxes
• #​4935: Fix password input button unexpectedly stretching
• #​4936: Fix skip link underline being removed when global styles are enabled
• #​4938: Fix attributes option ignoring values passed from the safe filter

v5.3.0

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To install this version with npm, run npm install [email protected]. You can also find more information about how to stay up to date in our documentation.

New features

Use the Password input component to help users accessibly enter passwords

The Password input component allows users to choose:

• whether their passwords are visible or not
• to enter their passwords in plain text

This helps users use longer and more complex passwords without needing to remember what they've already typed.

This change was introduced in pull request #​4442: Create password input component. Thanks to @​andysellick for the original contribution.

Recommended changes

Update the HTML for the Character count component

We've updated the HTML for the Character count component. The component wrapper data-module="govuk-character-count" and its form group class="govuk-form-group" are now combined as the same <div>. The hint text used as the count message now appears directly after the <textarea>.

If you're not using Nunjucks macros, then you should:

• move all classes and attributes from the form group <div> to the component wrapper <div>
• remove the opening <div> and closing </div> tags used by the form group
• check the count message is now directly after the <textarea>

The following example shows some HTML and the difference once it’s updated.

HTML before:

<div class="govuk-character-count" data-module="govuk-character-count" data-maxlength="100">
  <div class="govuk-form-group">
    <!-- // Label, hint, error and textarea -->
  </div>
  <!-- // Count message -->
</div>

HTML after:

<div class="govuk-form-group govuk-character-count" data-module="govuk-character-count" data-maxlength="100">
  <!-- // Label, hint, error, textarea and count message -->
</div>

Check your changes against the Character count example in the Design System to make sure you’ve correctly implemented them.

This change was introduced in pull request #​4566: Use Character count formGroup as module wrapper.

Remove redundant role attributes from elements

We've made minor changes to the HTML of the page template, as well as the header, footer and pagination components.

You can update your HTML to remove the role attribute from some elements. These include the:

• main role on the main element in the template
• banner role on the header element in the Header component
• contentinfo role on the footer element in the Footer component
• navigation role on the nav element in the Pagination component

These roles were present to support legacy browsers, such as older versions of Internet Explorer. GOV.UK Frontend no longer supports these browsers, so you can now remove these roles.

You do not need to change anything if you're using the Nunjucks versions of the page template or these components,

This change was introduced in pull request #​4854: Remove redundant role attributes.

Fixes

We've fixed an upstream issue in the cssnano npm package that caused elements with transparency to render incorrectly in Internet Explorer 11. This affected the pre-compiled CSS files in the GOV.UK Frontend npm package and GitHub releases for versions 5.0, 5.1 and 5.2. This was fixed in:

• #​1573: feat: add preset and plugin options for browserslist in the cssnano repository
• #​4829: Bump the postcss group with 2 updates

We've made fixes to GOV.UK Frontend in the following pull requests:

• #​4811: Use KeyboardEvent.key over deprecated KeyboardEvent.keyCode in the Tabs component
• #​4812: Use KeyboardEvent.key over deprecated KeyboardEvent.keyCode in the Button component
• #​4813: Remove deprecated KeyboardEvent properties from the Exit this Page component
• #​4855: Fix mobile product name being misaligned in new type scale

v5.2.0

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In this release, we’ve adjusted our responsive type scale, which is available behind a feature flag. The type scale change is to make text easier to read on smaller screens. We’ve also deprecated the useTudorCrown parameter.

To install this version with npm, run npm install [email protected]. You can also find more information about how to stay up to date in our documentation.

New features

We've adjusted our responsive type scale

We've made the following adjustments to our responsive type scale:

• point 16 now returns 16px across all screen sizes
• point 19 now returns 19px across all screen sizes
• point 24 remains as 24px on large screens
• point 24 now returns 21px on small screens instead of 18px and has a line height 25px instead of 20px
• point 27 remains as 27px on large screens
• point 27 now returns 21px on small screens instead of 18px and has a line height 25px instead of 20px
• point 36 remains as 27px on large screens
• point 36 now returns 27px on small screens instead of 24px and has a line height 30px instead of 25px

To enable these changes, set the feature flag variable $govuk-new-typography-scale to true before you import GOV.UK Frontend in your Sass files:

// application.scss
$govuk-new-typography-scale: true;
@​import "govuk-frontend/all";

If your service uses custom elements made using GOV.UK Frontend, test your service against the new typography scale to assess if you need to make any adjustments.

You can read more on upgrading your service to the new type scale in our upgrade guide.

This change was introduced in pull request #​2421: Adjust the responsive type scale

Insert custom HTML into component form group wrappers

You can now insert custom HTML into form group wrappers for all components with form fields.

govukInput({
  formGroup: {
    beforeInput: {
      html: "example"
    },
    afterInput: {
      html: "example"
    },
  }
})

This change was introduced in pull request #​4567: Add beforeInput(s) and beforeInput(s) options to form groups.

Deprecated features

Stop using the useTudorCrown parameter in the Heading component

The rollout for the revised GOV.UK logo has started and the Tudor crown logo is now shown by default. We’ve deprecated the useTudorCrown parameter and will remove it in the next major release.

You can now remove the useTudorCrown parameter, along with any other adjustments made to display the Tudor crown logo in your service.

This change was introduced in pull request #​4740: Make Tudor Crown logo the default

Fixes

We've made fixes to GOV.UK Frontend in the following pull requests:

• #​4768: Fix z-index of inputs in Radios and Checkboxes component
• #​4784: Fix LibSass calc() compatibility in Radios and Checkboxes

v5.1.0

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To install this version with npm, run npm install [email protected]. You can also find more information about how to stay up to date in our documentation.

New features

Update to the new GOV.UK logo

The GOV.UK logo has been updated to reflect the changing of the monarch. King Charles III uses the Tudor Crown, rather than the St Edward’s Crown chosen by Queen Elizabeth II.

If your service uses GOV.UK branding, you must update your service between 19 February and 1 March 2024 to use the new logo.

These changes were made in the following pull requests:

• #​4354: Implement the Tudor crown favicons (v5.x)
• #​4297: Implement the Tudor crown in the Header component (v5.x)

Include the new logo assets

Multiple new image assets are included in this release. You’ll need to copy these to your service's image assets folder if they’re not being used directly from the Frontend package. By default this folder is located at /assets/images.

If you’re using Nunjucks, the asset path may have been changed by the assetPath global variable or assetsPath parameter on the header component.

Copy the following files from /dist/assets/images into your assets folder. Any images with the same name as an existing image can be safely overwritten.

• favicon.ico
• favicon.svg
• govuk-icon-180.png
• govuk-icon-192.png
• govuk-icon-512.png
• govuk-icon-mask.svg
• govuk-opengraph-image.png

Update the logo in the header of your page

If you’re using the govukHeader Nunjucks macro in your service, add the useTudorCrown parameter to the macro instantiation. This will become the default in a future version of GOV.UK Frontend.

{{ govukHeader({
  ...
  useTudorCrown: true
}) }}

If you’re not using the Nunjucks macro, locate the SVG code for the existing logo and replace it with this updated SVG.

<svg
  focusable="false"
  role="img"
  class="govuk-header__logotype"
  xmlns="http://www.w3.org/2000/svg"
  viewBox="0 0 148 30"
  height="30"
  width="148"
  aria-label="GOV.UK"
>
  <title>GOV.UK</title>
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</svg>

Add attributes to component form group wrappers

You can now add attributes to the form group wrapper for all components with form fields.

govukRadios({
  formGroup: {
    attributes: {
      "data-attribute": "value"
    }
  }
})

This change was introduced in pull request #​4565: Allow attributes option on form groups.

Use tabular numbers with the govuk-font-tabular-numbers mixin

You can now use tabular numbers in your authored Sass by including the new govuk-font-tabular-numbers mixin.

Previously, you’d use the govuk-font mixin with the $tabular parameter. However, the govuk-font mixin includes styles unrelated to tabular numbers, which are not needed in some contexts.

These additional styles are not included if you use govuk-font-tabular-numbers. Switching to the new mixin can reduce the size of your compiled CSS without affecting the appearance of pages.

This change was introduced in pull request #​4307: Refactor tabular number activation into their own mixin.

Recommended changes

Replace instances of govuk-typography-responsive with govuk-font-size

We've renamed the Sass mixin govuk-typography-responsive to govuk-font-size and have deprecated govuk-typography-responsive. You can still use govuk-typography-responsive, but we'll remove it in a future breaking release (GOV.UK Frontend v6.0.0).

This is an experimental change to see if the name govuk-font-size better communicates the Sass mixin's intended use than the name govuk-typography-responsive.

We're interested in feedback from the community on this name change, so please let us know what you think through our usual channels.

This change was introduced in pull request #​4291: Rename govuk-typography-responsive to govuk-font-size.

Remove the aria-labelledby attribute from accordion sections

If you’re not using our Nunjucks macros, remove the aria-labelledby attribute from all accordion sections (div elements that have the govuk-accordion__section-content class).

This change was introduced in pull request #​4628: Remove aria-labelledby from accordion sections.

Deprecated features

Stop using the element parameter on buttons

We’ve deprecated the element Nunjucks parameter and will remove it in the next major release.

In the future, if the href parameter is set the component will automatically use the <a> element. If the href parameter is not set the component will automatically use the <button> element. It will not be possible to override this change.

This change was introduced in pull request #​4646: Deprecate element parameter on button component.

Stop using govuk-body-xs, govuk-!-font-size-14 and '14' on the type scale

We’ve deprecated point 14 (14px large screens, 12px small screens) on the GOV.UK Frontend responsive type scale, including font override classes that use point 14:

• govuk-body-xs
• govuk-!-font-size-14

We’ll remove these classes and point 14 on the type scale in the next major release, GOV.UK Frontend release v6.0.0. With this change in the v6.0.0 release, you’ll no longer be able to call the Sass mixins govuk-font or govuk-font-size with $size set to '14'.

This change was introduced in #​4649: Deprecate 14 on the type scale and #​4713: Ensure govuk-font-size() handles string keys.

Fixes

We've made fixes to GOV.UK Frontend in the following pull requests:

• #​4157: Dynamically position text within input prefixes and suffixes
• #​4150: Header menu button position refactor
• #​4093: Refactor positioning of radios and checkboxes
• #​4562: Use CSS custom properties for component matchMedia()

v5.0.0

Compare Source

You can find a summary of the main changes to GOV.UK Frontend v5 on the Frontend site. It's important to note our old frameworks (such as GOV.UK Elements) are no longer compatible with this release. It also stops Internet Explorer 11 from running GOV.UK Frontend JavaScript and removes support completely for Internet Explorer 8 to 10.

Your service will not stop working in Internet Explorer 11, but components will look and behave differently without JavaScript. Read more about how we provide support for different browsers.

Service teams should be using a progressive enhancement approach to make sure users can still access any content and complete their tasks.

If you still need to provide support for older versions of Internet Explorer, you should stay on the latest GOV.UK Frontend v4 release.

If you need it, we have a checklist for the changes you might need to make for v5, which you can view or copy (needs a Google account).

Breaking changes

You must make the following changes when you migrate to this release, or your service might break.

Update package file paths for Sass

In preparation for additional build targets, we've moved our package files into a directory called dist.

Replace govuk-frontend/govuk with govuk-frontend/dist/govuk in any Sass @import paths.

For example:

@​import "node_modules/govuk-frontend/dist/govuk/all";

If you've added node_modules/govuk-frontend as a Sass import path, update it with the /dist suffix:

loadPaths: [
  'node_modules/govuk-frontend/dist'
]

If you're building your Sass code through Rails Assets Pipeline or Sprockets, refer to the section 'Update package file paths in Rails Assets Pipeline or Sprockets'.

Refer to the detailed guidance on importing using Sass.

These changes were introduced in #​3498: Remove built dist and package from source

Update package file paths for Nunjucks

In preparation for additional build targets, we've moved our package files into a directory called dist.

Replace govuk-frontend with govuk-frontend/dist in any nunjucks.configure() search paths:

nunjucks.configure([
  'node_modules/govuk-frontend/dist'
])

Refer to the detailed guidance on using Nunjucks.

These changes were made in the following pull requests:

• #​3491: Update Review app to import govuk-frontend via local package
• #​3498: Remove built dist and package from source

Update package file paths for assets such as images and fonts 

In preparation for additional build targets, we've moved our package files into a directory called dist.

If you're serving the assets from the GOV.UK Frontend assets folder (node_modules/govuk-frontend/govuk/assets), update your routing to the new assets path : node_modules/govuk-frontend/dist/govuk/assets.

Refer to the detailed guidance on importing assets.

These changes were introduced in #​3498: Remove built dist and package from source

Update package file paths in Rails Assets Pipeline or Sprockets

In preparation for additional build targets, we've moved our package files into a directory called dist.

Update the  node_modules/govuk-frontend part of the path to node_modules/govuk-frontend/dist, if you've added the path to GOV.UK Frontend package inside node_modules to:

• Rails Assets Pipeline search path using Rails.application.config.assets.paths
• Sprockets using append_path

These changes were introduced in #​3498: Remove built dist and package from source

Update package file paths if including JavaScript directly

In preparation for additional build targets, we've moved our package files into a directory called dist.

If you've set up your routing to serve GOV.UK Frontend's all.js file from node_modules, update the path you're serving to node_modules/govuk-frontend/dist/govuk/govuk-frontend.min.js.

Update any <script> tag with the new path and filename, if necessary. Make sure they have a type="module" attribute. For example:

<script type="module" src="{path-to-javascript}/govuk-frontend.min.js"></script>

Replace <script>window.GOVUKFrontend.initAll()</script> to import and initialise GOV.UK Frontend using ES modules:

<script type="module">
  import { initAll } from '{path-to-javascript}/govuk-frontend.min.js'

  initAll()
</script>

Refer to the detailed guidance on importing JavaScript.

These changes were introduced in #​3498: Remove built dist and package from source

Update package file paths for Node.js and other bundlers

In preparation for additional build targets, we've moved our package files into a directory called dist.

If you're importing GOV.UK Frontend using import ... from 'govuk-frontend' or require('govuk-frontend'), you have nothing to change.

If you're using import to import individual components, replace govuk-frontend/govuk with govuk-frontend/dist/govuk. For example:

import Button from 'govuk-frontend/dist/govuk/components/button/button.mjs'

If you're using require to import individual components, replace govuk-frontend/govuk with govuk-frontend/dist/govuk and update the file name to <COMPONENT_NAME>.bundle.js. For example:

const Button = require('govuk-frontend/dist/govuk/components/button/button.bundle.js')

Refer to the detailed guidance on importing JavaScript.

These changes were introduced in #​3498: Remove built dist and package from source

Verify your code does not rely on polyfills we have now removed

We have removed polyfills for Internet Explorer 8 to 11:

• DOMTokenList, Element.prototype.classList, Element.prototype.closest, Element.prototype.matches, and Event - required for Internet Explorer 11 and below
• Element.prototype.dataset - required for Internet Explorer 10 and below
• Date.now, Document, Element, Element.prototype.nextElementSibling, Element.prototype.previousElementSibling, Function.prototype.bind, Object.defineProperty, String.prototype.trim and Window - required for Internet Explorer 8

However, because these polyfills create or extend global objects ('polluting the global namespace'), you might have other code in your service unintentionally relying on the inclusion of these polyfills. You might need to introduce your own polyfills or rewrite your JavaScript to avoid using the polyfilled features.

These changes were introduced in pull request #​3570: Remove Internet Explorer 8 to 10 JavaScript polyfills, helpers, config

Stop Internet Explorer 11 and other older browsers running unsupported JavaScript

Add type="module" to all HTML <script> tags that include or bundle GOV.UK Frontend.

This is to stop Internet Explorer 11 and other older browsers running the JavaScript, which relies on features older browsers might not support and could cause errors.

Please note that <script> with type="module" runs JavaScript in a slightly different way than <script> without `type="module". You'll need to assess the impact of these nuances and make sure that:

• when your service code is bundled with GOV.UK Frontend it runs as expected in strict mode
• if you have any code that needs to run after GOV.UK Frontend in its own <script> tag, you'll need to make sure it's using type="module" or defer. This is because the tag loading GOV.UK Frontend will be deferred because of its type="module" attribute
• code that needs to run without being deferred, is split into its own file and loaded with a <script> tag without type="module"

If your service has JavaScript you want to run successfully in Internet Explorer (for example JavaScript for analytics), you will need to load it in a separate <script> tag without type="module" and make sure its code is compatible with the browsers it should run in (see previous section about polyfills).

These changes were introduced in pull request #​3720: Remove IE11 vendor polyfills

Update the <script> snippet at the top of your <body> tag

Page templates now include a new govuk-frontend-supported class on the <body> tag when GOV.UK Frontend JavaScript components are fully supported.

If you are not using our Nunjucks page template, replace the existing snippet:

<script>document.body.className = ((document.body.className) ? document.body.className + ' js-enabled' : 'js-enabled');</script>

with:

<script>document.body.className += ' js-enabled' + ('noModule' in HTMLScriptElement.prototype ? ' govuk-frontend-supported' : '');</script>

These changes were introduced in [pull request #​3801:

Add class .govuk-frontend-supported for ES modules support] (#​3801)

Update the hash used by your Content Security Policy

If your Content Security Policy uses a hash to let the snippet above run, you'll need to update it from:

sha256-+6WnXIl4mbFTCARd8N3COQmT3bJJmo32N8q8ZSQAIcU=

to:

sha256-GUQ5ad8JK5KmEWmROf3LZd9ge94daqNvd8xy9YS1iDw=

These changes were introduced in [pull request #​3801:

Add class .govuk-frontend-supported for ES modules support] (#​3801)

Remove calls to component init methods from your JavaScript

If you instantiate individual components, remove any calls to component init methods,  as initialisation now happens automatically. If you initialise the JavaScript using window.GOVUKFrontend.initAll(), you will not need to make any changes.

For example, the following:

new Radios($radio).init()

becomes:

new Radios($radio)

This change was introduced in pull request #​4011: Remove component init() methods and initialise in constructor.

Remove Internet Explorer 8 stylesheets, settings and mixins

We no longer support Internet Explorer 8 (IE8) in GOV.UK Frontend or provide dedicated stylesheets for the browser. Remove any references to these stylesheets from your HTML.

We've removed the govuk-if-ie8 and govuk-not-ie8 mixins, and the $govuk-is-ie8 and $govuk-ie8-breakpoint settings. These were deprecated in GOV.UK Frontend v4.6.0.

You should:

• remove calls to the govuk-if-ie8 mixin entirely (because the code passed to the mixin was only ever for Internet Explorer 8)
• replace calls to the govuk-not-ie8 mixin with the contents that were previously passed to the mixin (because now we always want the code passed to the mixin)
• verify your codebase no longer uses these mixins and variables
• remove ie8 from the $govuk-suppressed-warnings list, if present

If a library you depend on is not yet updated and relies on these mixins and variables, as a temporary workaround you can define the following mixins and variables before importing:

$govuk-is-ie8: false;
$govuk-ie8-breakpoint: ('desktop');
@​mixin govuk-if-ie8 {
  @​if false {
    @​content;
  }
}
@​mixin govuk-not-ie8 {@​content}

This change was introduced in pull request #​3559: Remove IE8-related Sass and CSS build tasks.

Remove references to "Compatibility mode" and related features from your Sass

GOV.UK Frontend is no longer compatible with our old frameworks:

• GOV.UK Elements
• GOV.UK Template
• GOV.UK Frontend Toolkit.

You cannot migrate an existing service to GOV.UK Frontend v5.0 if it is still using one of these frameworks -- you'll need to remain on the latest v4.x release until you've finished the migration. Remove any references to these Sass variables and mixins:

• $govuk-compatibility-govukelements

• $govuk-compatibility-govuktemplate

• $govuk-compatibility-govukfrontendtoolkit

• the govuk-compatibility mixin which could be used to conditionally output CSS when compatibility mode was enabled

• remove compatibility-mode from the $govuk-suppressed-warnings list, if present

We've additionally removed features that were managed using the above variables. We've removed the following features and their corresponding variables:

• access to the legacy colour palette using $govuk-use-legacy-palette
• access to the legacy font using $govuk-use-legacy-font
• use of legacy tabular fonts using $govuk-font-family-tabular
• the ability to not use rem font sizes using $govuk-typography-use-rem

These changes were introduced in:

• pull request #​3622: Remove compatibility mode variables
• pull request #​3602: Remove compatibility-mode mixin
• pull request #​3576: Remove legacy colour palette
• pull request #​3574: Remove legacy and tabular fonts support
• pull request #​3576: Remove $govuk-typography-use-rem setting

Remove references to font family variables from your Sass

Remove any references to following Sass variables:

• $govuk-font-family-gds-transport
• $govuk-font-family-nta
• $govuk-font-family-nta-tabular

If you were using $govuk-font-family-gds-transport to set the font on an element, we recommend using the govuk-font mixin instead.

This change was introduced in pull request #​3949: Simplify font family settings.

Remove references to govuk-button--disabled class from the HTML for the Button component

For the Button component, remove any references to the govuk-button--disabled class that we deprecated in GOV.UK Frontend v4.6.0.

Use the disabled attribute to mark <button> and <input> elements as being disabled instead.

We no longer support link buttons being disabled or using disabled styles.

This change was introduced in pull request #​3557: Remove deprecated govuk-button--disabled class.

Remove references to the JavaScript for the Details component

The Details component no longer uses JavaScript, and is no longer polyfilled in older browsers.

If you are importing the JavaScript for this component individually, remove any references to it.

If you are not using our Nunjucks macros, remove the data-module="govuk-details" attribute from all <details> elements.

We've styled the details component so content does not look 'broken' in browsers that do not support it. If your service supports these browsers,  you will need to add your own polyfills.

This change was introduced in:

• pull request #​3766: Remove JavaScript from Details component.
• pull request #​3758: Style details in older browsers

Update the GOV.UK logo

We've updated the GOV.UK logo to merge the GOV.UK text with the crown graphic. This is to make sure the full logo is always rendered correctly even if parts of the page, such as CSS or the Transport webfont, fail to load. We've also modified styles relating to the logo.

If you're using the govukHeader Nunjucks macro you don't need to change anything.

Otherwise, to update to the new logo:

• remove <span class="govuk-header__logotype-text"> and its content
• remove the <span class="govuk-header__logotype"> around the svg element
• replace the svg element with this updated SVG, and make sure you also update the class name and attributes

This change was introduced in pull request #​4449: Implement transitional crown in the Header component (v5.0).

Check your favicons, app icons and OpenGraph image still work

We've changed the names, formats and sizes of icon assets we distribute in Frontend. You will want to check that the correct files are copied in the right place and served at the right URLs.

The following files have been added to the assets folder:

• manifest.json
• images/favicon.svg
• images/govuk-icon-180

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