| # | As a … | I want … | So that … | |---|--------|----------|-----------| | US‑001 | Visitor | a sticky top bar that stays attached to the top of the viewport while I scroll | I never lose the navigation controls and can jump to other sections quickly. | | US‑002 | Visitor on Mobile | the bar to collapse into a compact “hamburger‑plus‑search” icon after scrolling 100 px | I keep more screen real‑estate for content but still have quick access when needed. | | US‑003 | Returning User | the bar to display contextual shortcuts (e.g., “My Dashboard”, “Saved Items”, “Recent Articles”) based on my last activity | I can resume my workflow with a single tap. | | US‑004 | Content Editor | to configure the contextual actions (via CMS) per‑page or per‑section | I can tailor the top bar to the unique needs of each content type. | | US‑005 | Site Owner | analytics events (impressions, clicks, dismissals) to be automatically emitted to the data‑layer | I can measure adoption and iterate on the UI. | | US‑006 | Accessibility Advocate | the bar to be keyboard‑navigable and screen‑reader friendly | All users, regardless of ability, can interact with the navigation. | | US‑007 | Performance Engineer | the component to lazy‑load non‑essential assets and not block the Critical Rendering Path | Page load remains fast (≤ 1 s FCP on 3G). |
| FR # | Description |
|------|-------------|
| FR‑1 | Sticky behavior: The top bar becomes fixed to the viewport after the user scrolls past its original position (or after 80 px on mobile). |
| FR‑2 | Responsive collapse: On viewports ≤ 768 px, the bar collapses to a 44 px high minimal header showing only a hamburger menu, logo, and a search icon. |
| FR‑3 | Contextual actions: Up to four action items (icons + optional label) can be injected via a JSON payload from the CMS. Items may be static (e.g., “Home”) or dynamic (e.g., “My Cart”). |
| FR‑4 | Search integration: A search field expands inline when the search icon is tapped; it should support autocomplete via existing site‑wide search API. |
| FR‑5 | Branding: The bar must display the site logo (SVG) on the left, respecting the brand’s primary color palette. |
| FR‑6 | Theme support: Must react to the global CSS variable --theme-mode (light / dark). |
| FR‑7 | Accessibility: All interactive elements must have aria-labels, focus order must be logical, and the bar must not trap focus. |
| FR‑8 | Analytics: Emit hibijyonsc14wmv.top.impression, hibijyonsc14wmv.top.click, hibijyonsc14wmv.top.collapse, and hibijyonsc14wmv.top.expand events with page‑type, user‑id (if logged‑in), and timestamp. |
| FR‑9 | Performance: Bundle size < 30 KB gzipped. No render‑blocking CSS/JS. Use IntersectionObserver for lazy‑loading icons. |
| FR‑10 | Graceful fallback: If JavaScript is disabled, the bar should render as a static header with only the logo and primary navigation links. |
| Dependency | Owner | Risk Level | Mitigation |
|------------|-------|------------|------------|
| CMS schema change (new topBarConfig type) | Content Team | Medium | Create a feature flag; rollout on staging first. |
| Search API latency | Backend | High | Add debouncing (300 ms) + loading spinner; fallback to static results if > 1 s. |
| Legacy browsers (IE 11) | Front‑End | Low | Provide non‑sticky static fallback; polyfill IntersectionObserver only when needed. |
| Design hand‑off timing | Design | Medium | Use shared component library (Storybook) to prototype early. |
| Analytics privacy (GDPR) | Legal | Medium | Emit only anonymised IDs; respect doNotTrack. | hibijyonsc14wmv top
The document follows a pragmatic, product‑oriented structure that can be dropped straight into a product backlog (Jira, Azure DevOps, ClickUp, etc.) and used by designers, engineers, QA, and stakeholders.
| Feature ID | HIBI‑TOP‑001 |
|----------------|-------------------|
| Title | Hibijyonsc14wmv Top – Dynamic “Sticky‑Top” Navigation & Context Bar |
| Owner | Product Owner – [Name] |
| Stakeholders | UI/UX Design, Front‑End Engineering, Content Management, Analytics, Marketing |
| Target Release | Q3 2026 (Sprint 27‑30) |
| Epic | “Modernize Site‑wide Navigation” |
| Problem Statement | Users on desktop and mobile frequently lose their place when scrolling long‑form content, resulting in higher bounce rates and lower task completion. Current top navigation is static, does not adapt to user context, and is not accessible on small viewports. |
| Goal | Deliver a sticky, context‑aware top bar that (a) remains visible while scrolling, (b) surfaces the most relevant actions for the current page, (c) adapts to device size, and (d) provides analytics hooks for usage tracking. |
| Success Metrics | • Increase average session duration by ≥ 8 %
• Reduce “lost‑in‑page” support tickets by ≥ 15 %
• Achieve WCAG 2.2 AA compliance on the component
• 90 %+ of users on mobile devices report the top bar as “helpful” in post‑release surveys | | # | As a … | I
| # | Criteria | Test Type | |---|----------|-----------| | AC‑1 | The bar becomes sticky after scrolling past its original offset. | Cypress visual regression & unit test. | | AC‑2 | On viewport ≤ 768 px, the bar collapses to the minimal header and expands on tap. | Cypress responsive test + manual QA. | | AC‑3 | All contextual actions defined in CMS appear correctly (icon + label) and navigate to the configured URL. | Integration test (mock CMS response). | | AC‑4 | Search field opens on icon click, fetches suggestions, and redirects on submit. | End‑to‑end test. | | AC‑5 | Keyboard navigation works: Tab cycles through logo → hamburger → search → actions; focus is visible. | axe + manual a11y audit. | | AC‑6 | All analytics events fire with correct payload. | Mock data‑layer capture test. | | AC‑7 | Bundle size ≤ 30 KB gzipped; LCP does not increase > 200 ms on pages using the component. | Lighthouse CI. | | AC‑8 | Component renders a static fallback (logo + primary nav) when JavaScript is disabled. | No‑JS mode test (Chrome devtools → disable JS). | | AC‑9 | No console errors or warnings in Chrome, Edge, Safari, Firefox. | CI lint + Cypress console check. | | AC‑10 | Documentation updated: README, design spec link, CMS field definitions. | Docs review. |
| Area | Tech Stack | Details |
|------|------------|---------|
| Framework | React 18 (with Hooks) + TypeScript 5.3 | Functional component Hibijyonsc14wmvTop. |
| Styling | CSS‑Modules + CSS‑variables (fallback to SCSS) | BEM‑style class names: hibijyonsc14wmvTop__logo, etc. |
| State Management | Context API for theme + local component state for collapse. |
| CMS Integration | Headless CMS (Contentful) – fetch topBarConfig JSON via GraphQL. |
| Analytics | Data‑Layer push (window.dataLayer.push) – schema defined in analytics/events.d.ts. |
| Testing | Jest + React Testing Library (unit); Cypress (e2e). |
| Lint/Format | ESLint (airbnb‑base) + Prettier. |
| CI/CD | GitHub Actions – run lint, unit tests, build, then deploy to staging via Netlify. |
| Performance | Code‑splitting with React.lazy for icons; use requestIdleCallback for non‑critical initialisation. |
| Accessibility | axe-core integration in CI; role="navigation" with aria-label="Main top navigation"; focus‑visible outlines. |
| Browser Support | Chrome 108+, Edge 108+, Safari 15+, Firefox 102+; polyfill for IntersectionObserver on IE 11 (graceful degradation). | | FR # | Description | |------|-------------| |
File Structure (example)
src/
└─ components/
└─ hibijyonsc14wmv-top/
├─ Hibijyonsc14wmvTop.tsx
├─ Hibijyonsc14wmvTop.module.css
├─ types.ts
├─ useSticky.ts // custom hook for scroll detection
├─ useCollapse.ts // custom hook for mobile collapse
└─ __tests__/
├─ Hibijyonsc14wmvTop.test.tsx
└─ a11y.test.tsx