feat(DatePicker): add accessibility announcement for arrow key navigation

CLAUDE.md

@@ -0,0 +1,98 @@
+# CLAUDE.md
+
+This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.
+
+## About Octuple
+
+Octuple is Eightfold's React Design System Component Library. It's a comprehensive collection of reusable React components, utilities, and hooks built with TypeScript and SCSS modules.
+
+## Development Commands
+
+### Primary Development Commands
+- `yarn storybook` - Run Storybook development server on port 2022
+- `yarn build` - Build the library for production (runs lint + rollup build)
+- `yarn test` - Run Jest unit tests with coverage
+- `yarn lint` - Run ESLint on all JS/JSX/TS/TSX files
+- `yarn typecheck` - Run TypeScript type checking without emitting files
+
+### Testing Commands
+- `yarn test:update` - Update Jest snapshots
+- Run single test: `jest path/to/test.test.tsx`
+
+### Build Commands
+- `yarn build-storybook` - Build Storybook for deployment
+- `yarn build:webpack` - Alternative webpack-based build (runs lint + webpack)
+
+### Release Commands
+- `yarn release` - Standard version release (skips tests)
+- `yarn release:minor` - Minor version release
+- `yarn release:patch` - Patch version release
+- `yarn release:major` - Major version release
+
+## Code Architecture
+
+### Component Structure
+Components follow a strict modular structure in `src/components/`:
+- Each component has its own directory with TypeScript files, SCSS modules, Storybook stories, and Jest tests
+- Main export file: `src/octuple.ts` - exports all public components and utilities
+- Locale exports: `src/locale.ts` - internationalization utilities
+
+### Key Directories
+- `src/components/` - All React components organized by component name
+- `src/hooks/` - Custom React hooks (useBoolean, useGestures, useMatchMedia, etc.)
+- `src/shared/` - Shared utilities and common components (FocusTrap, ResizeObserver, utilities)
+- `src/styles/` - Global SCSS styles and variables
+- `src/tests/` - Test utilities and setup files
+
+### Component Patterns
+Components follow consistent patterns:
+- TypeScript interfaces defined in `ComponentName.types.ts`
+- SCSS modules using kebab-case class names (referenced as camelCase in JS)
+- Exported through barrel exports in `index.ts` files
+- Use `mergeClasses` utility for conditional class name handling
+- Support for themes via ConfigProvider context
+
+### Build System
+- **Rollup** for library bundling (primary build system)
+- **Webpack** alternative build available
+- **SCSS modules** with camelCase conversion
+- **TypeScript** compilation with strict type checking
+- **PostCSS** for CSS processing and minification
+- Outputs both ESM (.mjs) and CommonJS (.js) formats
+
+### Testing Approach
+- **Jest** with React Testing Library
+- **Enzyme** with React 17 adapter
+- **Snapshot testing** for component rendering
+- **MatchMedia mock** for responsive testing
+- **ResizeObserver** polyfill for tests
+- Coverage collection configured
+
+### Component Guidelines
+Follow the established patterns in `src/components/COMPONENTS.md`:
+- Use functional components with TypeScript
+- Define props interfaces with JSDoc comments
+- Use SCSS modules for styling
+- Include Storybook stories for documentation
+- Write comprehensive Jest tests with snapshots
+- Export all public APIs through barrel exports
+
+### Storybook
+- Development server runs on port 2022
+- Stories follow the pattern `ComponentName.stories.tsx`
+- Used for component documentation and visual testing
+
+### Key Dependencies
+- React 17+ (peer dependency)
+- TypeScript for type safety
+- SCSS for styling with CSS modules
+- Storybook for component documentation
+- Jest + React Testing Library for testing
+- Various UI utility libraries (@floating-ui/react, react-spring, etc.)
+
+### Conventional Commits
+Commit messages must follow the Conventional Commits specification:
+- Format: `<type>[optional scope]: <description>`
+- Types: build, chore, ci, docs, feat, fix, perf, refactor, revert, style, test
+- Subject line max 100 characters
+- Combined body and footer max 100 characters

src/components/DateTimePicker/DatePicker/DatePicker.stories.tsx

@@ -557,6 +557,110 @@ const Range_Status_Story: ComponentStory<typeof RangePicker> = (args) => {
   );
 };
 
+const Accessibility_Announcement_Story: ComponentStory<typeof DatePicker> = (
+  args
+) => {
+  const onChange: DatePickerProps['onChange'] = (date, dateString) => {
+    console.log(date, dateString);
+  };
+
+  return (
+    <ConfigProvider themeOptions={{ name: 'blue' }}>
+      <Stack direction="vertical" flexGap="xl">
+        <div>
+          <h3>Default Announcement (uses locale text)</h3>
+          <p>Opens with "Use arrow keys to navigate dates" announcement</p>
+          <Stack direction="vertical" flexGap="m">
+            <DatePicker
+              {...args}
+              onChange={onChange}
+              announceArrowKeyNavigation
+              placeholder="Click to open with announcement"
+            />
+            <DatePicker.RangePicker
+              onChange={(values, formatString) => {
+                console.log(values, formatString);
+              }}
+              trapFocus
+              announceArrowKeyNavigation
+            />
+          </Stack>
+        </div>
+
+        <div>
+          <h3>Custom Announcement Message</h3>
+          <p>Opens with custom announcement text</p>
+          <DatePicker
+            {...args}
+            onChange={onChange}
+            announceArrowKeyNavigation="Navigate this calendar using your arrow keys"
+            placeholder="Click to open with custom announcement"
+          />
+        </div>
+
+        <div>
+          <h3>Focus Trap + Announcement (Coordinated)</h3>
+          <p>
+            Announces navigation first, then automatically moves focus to
+            calendar after 1 second
+          </p>
+          <DatePicker
+            {...args}
+            onChange={onChange}
+            announceArrowKeyNavigation={true}
+            trapFocus={true}
+            placeholder="Click for announcement → auto focus shift"
+          />
+        </div>
+
+        <div>
+          <h3>Focus Trap Only (Immediate)</h3>
+          <p>Immediately moves focus to calendar without announcement</p>
+          <DatePicker
+            {...args}
+            onChange={onChange}
+            trapFocus={true}
+            placeholder="Click for immediate focus shift"
+          />
+        </div>
+
+        <div>
+          <h3>No Announcement (default behavior)</h3>
+          <p>Opens without any navigation announcement or focus changes</p>
+          <DatePicker
+            {...args}
+            onChange={onChange}
+            placeholder="Click to open without announcement"
+          />
+        </div>
+
+        <div
+          style={{
+            backgroundColor: '#f5f5f5',
+            padding: '16px',
+            borderRadius: '4px',
+          }}
+        >
+          <h4>Screen Reader Instructions:</h4>
+          <p>
+            To test this feature with a screen reader:
+            <br />• Enable your screen reader (NVDA, JAWS, VoiceOver, etc.)
+            <br />• <strong>Coordinated example:</strong> Click "announcement →
+            auto focus shift" - hear announcement, then focus moves to calendar
+            after 1 second
+            <br />• <strong>Immediate example:</strong> Click "immediate focus
+            shift" - focus moves to calendar immediately
+            <br />• <strong>Keyboard navigation:</strong> Use TAB/Shift+TAB to
+            cycle within the trapped focus area
+            <br />• <strong>Exit:</strong> Press ESC or click outside to return
+            focus to input and close picker
+          </p>
+        </div>
+      </Stack>
+    </ConfigProvider>
+  );
+};
+
 const Range_Picker_With_Aria_Labels_Story: ComponentStory<
   typeof RangePicker
 > = (args) => <DatePicker.RangePicker {...args} />;
@@ -592,6 +696,9 @@ export const Single_Borderless = Single_Borderless_Story.bind({});
 export const Range_Borderless = Range_Borderless_Story.bind({});
 export const Single_Status = Single_Status_Story.bind({});
 export const Range_Status = Range_Status_Story.bind({});
+export const Accessibility_Announcement = Accessibility_Announcement_Story.bind(
+  {}
+);
 export const Range_Picker_With_Aria_Labels =
   Range_Picker_With_Aria_Labels_Story.bind({});
 
@@ -622,6 +729,7 @@ export const __namedExportsOrder = [
   'Range_Borderless',
   'Single_Status',
   'Range_Status',
+  'Accessibility_Announcement',
   'Range_Picker_With_Aria_Labels',
 ];
 

src/components/DateTimePicker/DatePicker/Generate/generateRangePicker.tsx

@@ -78,6 +78,7 @@ export default function generateRangePicker<DateType>(
       todayButtonProps,
       todayActive = false,
       todayText: defaultTodayText,
+      trapFocus = false,
       ...rest
     } = props;
     const largeScreenActive: boolean = useMatchMedia(Breakpoints.Large);
@@ -268,6 +269,7 @@ export default function generateRangePicker<DateType>(
               superPrevIcon={IconName.mdiChevronDoubleLeft}
               superNextIcon={IconName.mdiChevronDoubleRight}
               allowClear
+              trapFocus={trapFocus}
               {...rest}
               {...additionalOverrideProps}
               classNames={mergeClasses([

src/components/DateTimePicker/DatePicker/Styles/mixins.scss

@@ -118,3 +118,16 @@ $picker-input-padding-vertical: max(
   cursor: not-allowed;
   opacity: $disabled-alpha-value;
 }
+
+// Screen reader only content mixin
+@mixin screen-reader-only() {
+  position: absolute;
+  width: 1px;
+  height: 1px;
+  padding: 0;
+  margin: -1px;
+  overflow: hidden;
+  clip: rect(0, 0, 0, 0);
+  white-space: nowrap;
+  border: 0;
+}

src/components/DateTimePicker/Internal/Hooks/useCellProps.ts

@@ -1,6 +1,6 @@
 import { formatValue } from '../Utils/dateUtil';
 import type { GenerateConfig } from '../Generate';
-import type { NullableDateType, Locale, RangeValue } from '../OcPicker.types';
+import type { NullableDateType, Locale } from '../OcPicker.types';
 
 type UseCellPropsArgs<DateType> = {
   generateConfig: GenerateConfig<DateType>;
@@ -11,7 +11,6 @@ type UseCellPropsArgs<DateType> = {
   ) => boolean;
   today?: NullableDateType<DateType>;
   locale: Locale;
-  rangedValue?: RangeValue<DateType>;
 };
 
 export default function useCellProps<DateType>({
@@ -20,7 +19,6 @@ export default function useCellProps<DateType>({
   isSameCell,
   locale,
   generateConfig,
-  rangedValue,
 }: UseCellPropsArgs<DateType>) {
   function getCellProps(currentDate: DateType) {
     return {
@@ -38,5 +36,5 @@ export default function useCellProps<DateType>({
       isCellFocused: isSameCell(value, currentDate),
     };
   }
-  return rangedValue ? undefined : getCellProps;
+  return getCellProps;
 }

src/components/DateTimePicker/Internal/Locale/en_US.ts

@@ -32,6 +32,7 @@ const locale: Locale = {
   nextAriaLabel: 'Next year',
   superPrevAriaLabel: 'Previous year',
   superNextAriaLabel: 'Next year',
+  arrowKeyNavigationText: 'Use arrow keys to navigate the calendar',
 };
 
 export default locale;

src/components/DateTimePicker/Internal/OcPicker.tsx

@@ -44,6 +44,7 @@ type MergedOcPickerProps<DateType> = {
 function InnerPicker<DateType>(props: OcPickerProps<DateType>) {
   const {
     allowClear,
+    announceArrowKeyNavigation,
     autoComplete = 'off',
     autoFocus,
     bordered = true,
@@ -370,6 +371,16 @@ function InnerPicker<DateType>(props: OcPickerProps<DateType>) {
     partialNode = partialRender(partialNode);
   }
 
+  const navigationAnnouncement = announceArrowKeyNavigation ? (
+    <div
+      className={styles.srOnly}
+      aria-live="polite"
+      aria-atomic="true"
+    >
+      {announceArrowKeyNavigation === true ? locale?.arrowKeyNavigationText : announceArrowKeyNavigation}
+    </div>
+  ) : null;
+
   const partial: JSX.Element = trapFocus ? (
     <FocusTrap
       data-testid="picker-dialog"
@@ -388,7 +399,10 @@ function InnerPicker<DateType>(props: OcPickerProps<DateType>) {
         }
       }}
     >
-      {partialNode}
+      <>
+        {navigationAnnouncement}
+        {partialNode}
+      </>
     </FocusTrap>
   ) : (
     <div
@@ -397,6 +411,7 @@ function InnerPicker<DateType>(props: OcPickerProps<DateType>) {
         e.preventDefault();
       }}
     >
+      {navigationAnnouncement}
       {partialNode}
     </div>
   );

src/components/DateTimePicker/Internal/OcPicker.types.ts

@@ -149,6 +149,10 @@ export type Locale = {
    * The super next aria label.
    */
   superNextAriaLabel?: string;
+  /**
+   * The arrow key navigation announcement text.
+   */
+  arrowKeyNavigationText?: string;
 };
 
 export type PartialMode =
@@ -621,6 +625,12 @@ export type OcPickerSharedProps<DateType> = {
    * @default false
    */
   autoFocus?: boolean;
+  /**
+   * Announces arrow key navigation instructions when the picker opens.
+   * When true, uses default locale text. When string, uses custom message.
+   * @default false
+   */
+  announceArrowKeyNavigation?: boolean | string;
   /**
    * Determines if the picker has a border style.
    */

src/components/DateTimePicker/Internal/OcPickerPartial.tsx

@@ -238,7 +238,6 @@ function OcPickerPartial<DateType>(props: OcPickerPartialProps<DateType>) {
       }
       return partialRef.current?.onKeyDown(e);
     }
-
     return null;
   };