build(deps): bump nhsuk-frontend from 10.3.1 to 10.4.0

[dependabot]

Bumps nhsuk-frontend from 10.3.1 to 10.4.0.

Release notes

Sourced from nhsuk-frontend's releases.

v10.4.0

10.4.0 - 18 March 2026

Note: This release was created from the support/10.x branch.

🆕 New features

Add a modifier class for header inline search or account links

We've added a new .nhsuk-header--inline class and inline Nunjucks option for the header component. This positions the search bar (or account links) inline with the NHS logo on small screens, depending on the length of your service name. For example:

  {{ header({
+   inline: true,
    account: {
      items: [
        {
          text: "Log in",
          href: "/log-in"
        }
      ]
    }
  }) }}

This was added in pull requests #1783: Add support for inline header search or account and #1801: Add Nunjucks options for components with modifier classes.

Add Nunjucks options for components with modifier classes

We've added a new variant Nunjucks option to action links, back links, buttons, breadcrumbs, panels and tables as a simpler alternative to the variant modifier classes. For example:

  {{ button({
    text: "Yes, delete this vaccine",
-   classes: "nhsuk-button--warning"
+   variant: "warning"
  }) }}

For modifiers that can exist together, these are now supported using boolean options, for example:

  {{ radios({
    fieldset: {
      legend: {
        text: "Sort by"
      }
    },
-   classes: "nhsuk-radios--small nhsuk-radios--inline",
+   small: true,
</tr></table> 

... (truncated)

Changelog

Sourced from nhsuk-frontend's changelog.

10.4.0 - 18 March 2026

Note: This release was created from the support/10.x branch.

🆕 New features

Add a modifier class for header inline search or account links

We've added a new .nhsuk-header--inline class and inline Nunjucks option for the header component. This positions the search bar (or account links) inline with the NHS logo on small screens, depending on the length of your service name. For example:

  {{ header({
+   inline: true,
    account: {
      items: [
        {
          text: "Log in",
          href: "/log-in"
        }
      ]
    }
  }) }}

This was added in pull requests #1783: Add support for inline header search or account and #1801: Add Nunjucks options for components with modifier classes.

Add Nunjucks options for components with modifier classes

We've added a new variant Nunjucks option to action links, back links, buttons, breadcrumbs, panels and tables as a simpler alternative to the variant modifier classes. For example:

  {{ button({
    text: "Yes, delete this vaccine",
-   classes: "nhsuk-button--warning"
+   variant: "warning"
  }) }}

For modifiers that can exist together, these are now supported using boolean options, for example:

  {{ radios({
    fieldset: {
      legend: {
        text: "Sort by"
      }
    },
-   classes: "nhsuk-radios--small nhsuk-radios--inline",
+   small: true,
+   inline: true,
</tr></table> 

... (truncated)

Commits

• f58aa2c Merge pull request #1858 from nhsuk/release-v10.4.0
• 10c5e63 Update package version to v10.4.0
• abbbb17 Move code word break to component
• a653215 Consolidate changes
• 47a7204 Merge pull request #1854 from nhsuk/fix-nested-lists-in-contents-list
• 82e7e7d Update reference images
• 19b6314 Add Nunjucks support for contents list nested items
• 4c4cd31 Fix order
• dbb3e60 Add changelog entry
• ef5aa3b Fix for nested lists in contents list
• Additional commits viewable in compare view

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[Themitchell]

@dependabot rebase

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

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