[dev-v5][Nav] Part 1 - Add the FluentNav components #4419
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Pull request overview
This pull request introduces a new FluentNav component family for navigation in the Fluent UI Blazor library. The implementation follows the Fluent Design System specification and provides a flexible, collapsible navigation menu with support for icons, categories, section headers, and programmatic control.
Key changes:
- Complete implementation of FluentNav, FluentNavItem, FluentNavCategory, FluentNavSectionHeader, and FluentNavDivider components
- Comprehensive test coverage with unit tests for all components
- TypeScript-based animations using Web Animations API for smooth expand/collapse transitions
Reviewed changes
Copilot reviewed 29 out of 29 changed files in this pull request and generated 18 comments.
Show a summary per file
| File | Description |
|---|---|
| src/Core/Components/Nav/FluentNav.razor(.cs/.css) | Main navigation container component with hamburger menu support |
| src/Core/Components/Nav/FluentNavItem.razor(.cs/.css) | Navigation item supporting both links and buttons with active state tracking |
| src/Core/Components/Nav/FluentNavCategory.razor(.cs/.css) | Collapsible category grouping for hierarchical navigation |
| src/Core/Components/Nav/FluentNavSectionHeader.razor(.cs/.css) | Section header for organizing navigation groups |
| src/Core/Components/Nav/FluentNavDivider.razor(.cs/.css) | Visual divider component for separating navigation sections |
| src/Core/Components/Nav/NavUtils.cs | Utility class for handling icon variants (active/inactive states) |
| src/Core/Components/Nav/FluentNav.razor.ts | TypeScript animations for expand/collapse with Fluent motion tokens |
| src/Core/Enums/NavDensity.cs | Enum defining navigation density options (Medium/Small) |
| src/Core/Components/Icons/CoreIcons.cs | Added ChevronUp and Folder icons to support navigation UI |
| src/Core/Localization/LanguageResource.resx | Added localized "Toggle navigation" string |
| tests/Core/Components/Nav/*.razor | Comprehensive unit tests covering all component scenarios |
| examples/Demo/.../Nav/FluentNav.md | Documentation explaining usage, features, and migration notes |
| examples/Demo/.../Nav/Examples/NavDefault.razor | Interactive demo showcasing all navigation features |
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examples/Demo/FluentUI.Demo.Client/Documentation/Components/Nav/Examples/NavDefault.razor
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vnbaaij
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✅ All tests passed successfully Details on your Workflow / Core Tests page. |
Summary - Unit Tests Code CoverageSummary
CoverageMicrosoft.FluentUI.AspNetCore.Components - 98.8%
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dvoituron
requested changes
Dec 23, 2025
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dvoituron
requested changes
Dec 29, 2025
- Fix tests (because of switchiog to DisposeAsync)
MarvinKlein1508
suggested changes
Dec 30, 2025
examples/Demo/FluentUI.Demo.Client/Documentation/Components/Nav/FluentNav.md
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examples/Demo/FluentUI.Demo.Client/Documentation/Components/Nav/Examples/NavDefault.razor
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…icrosoft/fluentui-blazor into users/vnbaaij/dev-v5/nav-part1
dvoituron
approved these changes
Dec 30, 2025
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Add the
FluentNavfamily of components including docs and tests (100% coverage). This is part 1 containing docs, components and tests. Next part will contain the changes to use this component in the demo site.This is an implementation of the Nav as described in the FluentDesign System (and implemented in React).
There is no upgrade/migration path vor the v4 FluentNavMenu and associated components as those offer multi level navigation. This implementation is simpler and only has one-level of nesting.
Unit tests Line coverage :
This pull request introduces a new
FluentNavnavigation component for Fluent UI, including its implementation, styling, documentation, and usage example. The component provides a flexible, collapsible navigation menu with support for icons, categories, section headers, and programmatic control. Additionally, new icon classes are added to the icon library to support navigation visuals.