# Product Requirements Document (PRD)
## Todo Task - Simple Form Submission Demo

**Version:** 1.0  
**Last Updated:** 2024  
**Product Manager:** Senior PM  
**Domain URL:** https://anil.dev.dalfin.ai

---

## 1. Overview

Todo Task is a minimalist single-page web application that demonstrates basic form submission and data display functionality. The application allows users to enter their name and email through a simple form, and upon submission, displays the entered data in a list below the form. This is a lightweight demo application focused solely on client-side form handling and display without authentication, backend services, or complex features.

---

## 2. User Roles

| Role | Description | Capabilities |
|------|-------------|--------------|
| **Anonymous User** | Any visitor accessing the application | - Fill out the form with name and email<br>- Submit the form<br>- View all previously submitted entries in the list<br>- Access all functionality without authentication |

---

## 3. Core Entities

### 3.1 Submission

**Description:** Represents a single form submission containing user-provided information.

**Attributes:**
- `id` (string/number): Unique identifier for the submission (auto-generated)
- `name` (string): The name entered by the user
- `email` (string): The email address entered by the user
- `timestamp` (datetime): When the submission was created (auto-generated)

---

## 4. Entity Relationships

### Relationship Diagram

```
Submission (standalone entity)
├── No relationships with other entities
└── Self-contained data structure
```

**Notes:**
- There is only one entity in this application
- Submissions exist independently with no references to other entities
- The application maintains a collection (array/list) of Submission entities in client-side memory

---

## 5. Key Workflows

### 5.1 Form Submission Workflow

**Actor:** Anonymous User

**Preconditions:** User has accessed the application

**Steps:**
1. User navigates to the single-page application
2. User views the empty form with Name and Email input fields
3. User enters their name in the Name input field
4. User enters their email address in the Email input field
5. User clicks the Submit button
6. System validates the input fields (client-side validation)
7. System creates a new Submission entity with:
   - Auto-generated unique ID
   - User-provided name
   - User-provided email
   - Current timestamp
8. System adds the Submission to the in-memory collection
9. System displays the new submission in the list below the form
10. System clears the form inputs for the next submission
11. System displays a visual confirmation (optional: brief success indicator)

**Postconditions:** 
- New submission appears in the list
- Form is reset to empty state
- User can submit another entry

**Alternative Flows:**
- **5a. Validation Failure:** If required fields are empty or email format is invalid, display inline error messages and prevent submission

---

### 5.2 View Submissions Workflow

**Actor:** Anonymous User

**Preconditions:** User has accessed the application

**Steps:**
1. User views the list section below the form
2. System displays all submissions in chronological order (newest first or oldest first)
3. Each submission displays:
   - Name value
   - Email value
   - (Optional) Timestamp of submission
4. User can scroll through the list if multiple entries exist

**Postconditions:** User has visibility of all submitted data

---

## 6. Features & Requirements

### 6.1 Form Module

#### F1.1: Name Input Field
- **Description:** Text input field for capturing user's name
- **Requirements:**
  - Label: "Name" or similar clear indicator
  - Input type: text
  - Required field
  - Accepts alphanumeric characters and spaces
  - Maximum length: 100 characters
  - Placeholder text: "Enter your name"
  - Visual indicator when field is focused

#### F1.2: Email Input Field
- **Description:** Text input field for capturing user's email address
- **Requirements:**
  - Label: "Email" or similar clear indicator
  - Input type: email (for mobile keyboard optimization)
  - Required field
  - Email format validation (must contain @ and domain)
  - Maximum length: 255 characters
  - Placeholder text: "Enter your email"
  - Visual indicator when field is focused

#### F1.3: Submit Button
- **Description:** Button to trigger form submission
- **Requirements:**
  - Clear label: "Submit" or "Add Entry"
  - Primary visual styling (distinct from other elements)
  - Disabled state when form is empty or invalid
  - Hover state for desktop users
  - Click/tap triggers form submission
  - Prevents default form submission behavior (no page reload)

#### F1.4: Form Validation
- **Description:** Client-side validation of form inputs
- **Requirements:**
  - Validate on form submission (not on every keystroke)
  - Name field: Must not be empty, must contain at least 2 characters
  - Email field: Must not be empty, must match email pattern
  - Display clear error messages near relevant fields
  - Error messages disappear when user corrects input
  - Prevent submission if validation fails

#### F1.5: Form Reset
- **Description:** Clear form inputs after successful submission
- **Requirements:**
  - Clear both name and email fields
  - Remove any validation error messages
  - Return focus to name field (optional)
  - Maintain list of submissions below

---

### 6.2 Submissions List Module

#### F2.1: List Display
- **Description:** Display area showing all submitted entries
- **Requirements:**
  - Located below the form on the same page
  - Display all submissions in a vertical list
  - Each entry clearly separated (visual spacing or borders)
  - Responsive layout that adapts to screen size
  - Scrollable if list exceeds viewport height

#### F2.2: Submission Entry Display
- **Description:** Individual submission item in the list
- **Requirements:**
  - Display name prominently
  - Display email below or adjacent to name
  - Optional: Display timestamp in human-readable format
  - Consistent styling across all entries
  - Adequate padding and spacing for readability

#### F2.3: Empty State
- **Description:** Display when no submissions exist
- **Requirements:**
  - Show message: "No submissions yet" or similar
  - Display before first submission is added
  - Friendly, non-technical language
  - Center-aligned or left-aligned consistently

#### F2.4: List Ordering
- **Description:** Order in which submissions appear
- **Requirements:**
  - Default order: Most recent submission first (top of list) OR oldest first (bottom of list)
  - Maintain consistent order throughout session
  - No sorting or filtering controls needed

---

### 6.3 User Interface Module

#### F3.1: Single-Page Layout
- **Description:** All functionality on one page without navigation
- **Requirements:**
  - No navigation menu or multiple pages
  - Form section at top or center of page
  - List section directly below form
  - No modals, pop-ups, or overlays
  - Clear visual hierarchy between form and list

#### F3.2: Responsive Design
- **Description:** Layout adapts to different screen sizes
- **Requirements:**
  - Mobile-first or mobile-friendly approach
  - Breakpoints for: mobile (320px+), tablet (768px+), desktop (1024px+)
  - Form inputs stack vertically on mobile
  - List entries remain readable on all screen sizes
  - Touch-friendly targets on mobile (minimum 44x44px)

#### F3.3: Minimal Styling
- **Description:** Clean, simple visual design
- **Requirements:**
  - Limited color palette (2-3 colors maximum)
  - Consistent typography (1-2 font families)
  - Adequate whitespace and padding
  - No complex animations or transitions
  - Focus on readability and usability
  - Accessible contrast ratios (WCAG AA minimum)

---

## 7. Business Rules

### 7.1 Data Validation Rules

| Rule ID | Rule Description | Impact |
|---------|-----------------|--------|
| BR-001 | Name field must contain at least 2 characters | Prevents submission with insufficient name data |
| BR-002 | Name field cannot exceed 100 characters | Prevents excessively long names |
| BR-003 | Email field must contain "@" symbol | Ensures basic email format |
| BR-004 | Email field must contain a domain after "@" | Ensures complete email format |
| BR-005 | Email field cannot exceed 255 characters | Prevents excessively long emails |
| BR-006 | Both fields are required for submission | Ensures complete data entry |
| BR-007 | Duplicate submissions are allowed | No uniqueness validation on name or email |

### 7.2 Data Storage Rules

| Rule ID | Rule Description | Impact |
|---------|-----------------|--------|
| BR-101 | All data stored in client-side memory only | Data is session-based and temporary |
| BR-102 | Data persists only during current browser session | Refresh/close loses all data |
| BR-103 | No server-side storage or database | Purely client-side application |
| BR-104 | Each submission receives unique auto-generated ID | Ensures list item uniqueness |
| BR-105 | Submissions cannot be edited after creation | Immutable once submitted |
| BR-106 | Submissions cannot be deleted | No removal functionality |

### 7.3 Behavioral Rules

| Rule ID | Rule Description | Impact |
|---------|-----------------|--------|
| BR-201 | Form clears after successful submission | Enables quick sequential entries |
| BR-202 | List updates immediately after submission | No delay or refresh needed |
| BR-203 | Page does not reload on submission | Single-page app behavior |
| BR-204 | No confirmation dialog required | Streamlined submission process |
| BR-205 | No user authentication or authorization | Open access to all functionality |

---

## 8. Non-Functional Requirements

### 8.1 Performance Requirements

| ID | Requirement | Target Metric |
|----|-------------|---------------|
| NFR-P-001 | Initial page load time | < 2 seconds on 3G connection |
| NFR-P-002 | Form submission response time | < 100ms (instant client-side) |
| NFR-P-003 | List rendering time for 100 entries | < 500ms |
| NFR-P-004 | Application bundle size | < 500KB total |
| NFR-P-005 | Memory usage for 1000 entries | < 10MB |

### 8.2 Usability Requirements

| ID | Requirement | Description |
|----|-------------|-------------|
| NFR-U-001 | Mobile responsiveness | Fully functional on screens 320px and above |
| NFR-U-002 | Browser compatibility | Support latest 2 versions of Chrome, Firefox, Safari, Edge |
| NFR-U-003 | Keyboard navigation | Form fully navigable with Tab/Enter keys |
| NFR-U-004 | Touch interaction | All interactive elements respond to touch on mobile devices |
| NFR-U-005 | Form field clarity | Labels and placeholders provide clear guidance |

### 8.3 Accessibility Requirements

| ID | Requirement | Standard |
|----|-------------|----------|
| NFR-A-001 | Color contrast | WCAG 2.1 AA compliance (4.5:1 for text) |
| NFR-A-002 | Keyboard accessibility | All functionality available via keyboard |
| NFR-A-003 | Form labels | Properly associated labels for screen readers |
| NFR-A-004 | Error messages | Announced to screen readers |
| NFR-A-005 | Semantic HTML | Proper use of form, input, button, list elements |

### 8.4 Security Requirements

| ID | Requirement | Description |
|----|-------------|-------------|
| NFR-S-001 | XSS prevention | Sanitize/escape user input before display |
| NFR-S-002 | Data privacy | Clear indication that data is not permanently stored |
| NFR-S-003 | HTTPS | Application served over HTTPS |
| NFR-S-004 | Input validation | Client-side validation prevents malicious input |

### 8.5 Scalability Requirements

| ID | Requirement | Description |
|----|-------------|-------------|
| NFR-SC-001 | Client-side limit | Application should handle up to 1000 submissions gracefully |
| NFR-SC-002 | No backend dependency | Application scales horizontally (static hosting) |
| NFR-SC-003 | Degradation strategy | If memory fills, provide clear message (optional) |

### 8.6 Maintainability Requirements

| ID | Requirement | Description |
|----|-------------|-------------|
| NFR-M-001 | Code simplicity | Minimal dependencies, straightforward architecture |
| NFR-M-002 | Framework choice | Use lightweight framework or vanilla JavaScript |
| NFR-M-003 | Code documentation | Clear comments for key functionality |
| NFR-M-004 | Version control | All code maintained in Git repository |

### 8.7 Reliability Requirements

| ID | Requirement | Description |
|----|-------------|-------------|
| NFR-R-001 | Error handling | Graceful handling of validation errors |
| NFR-R-002 | Browser errors | No console errors in supported browsers |
| NFR-R-003 | Data integrity | Submissions stored accurately without loss during session |

### 8.8 Deployment Requirements

| ID | Requirement | Description |
|----|-------------|-------------|
| NFR-D-001 | Hosting | Static file hosting (e.g., GitHub Pages, Netlify, Vercel) |
| NFR-D-002 | Domain | Accessible via https://anil.dev.dalfin.ai |
| NFR-D-003 | Build process | Simple build/deployment pipeline (optional bundler) |
| NFR-D-004 | Environment | Single production environment, no staging required |

---

## Appendix

### A. Out of Scope

The following features are explicitly **NOT** included in this application:

- User authentication or login
- Backend server or API
- Database or persistent storage
- Edit or delete functionality for submissions
- Search, filter, or sort capabilities
- Pagination or infinite scroll
- Export functionality (CSV, PDF, etc.)
- Multi-page navigation or routing
- File uploads or attachments
- Advanced form fields (dropdowns, checkboxes, etc.)
- User profiles or personalization
- Analytics or tracking
- Email notifications
- Data import functionality
- Collaboration features
- Third-party integrations

### B. Technical Constraints

- **Client-side only:** All logic executes in the browser
- **No backend:** No server-side processing or storage
- **Session-based:** Data does not persist across browser sessions
- **Single page:** No page navigation or URL routing

### C. Success Metrics

Since this is a demo application, success is measured by:
- Functional form submission and display
- Clean, minimal UI implementation
- Responsive behavior across devices
- Code simplicity and maintainability

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**End of Document**