# harshop03/inventory-billing-app architecture

> Architecture diagram of the GitHub repository harshop03/inventory-billing-app, generated by GitDiagram from its file tree, README and a sample of source files (last updated 2026-09-27). It is an AI-made overview: check details against the source.

- Interactive diagram: https://gitdiagram.com/harshop03/inventory-billing-app
- Repository: https://github.com/harshop03/inventory-billing-app

## Overview

StockPro is a browser-based inventory management SPA. Users sign in or create an account, then manage and filter inventory, review stock analytics, and import or export backups. Authentication and inventory data persist in browser LocalStorage; initial product data bootstraps the inventory. The README documents these capabilities, while sampled code confirms the authentication, dashboard, inventory, and backup behavior. Billing and customer management appear only as roadmap items, so they are excluded.

Main entry points: [`app.js`](https://github.com/harshop03/inventory-billing-app/blob/main/app.js) (App initialization and navigation), [`index.html`](https://github.com/harshop03/inventory-billing-app/blob/main/index.html) (SPA interface), [`auth.js`](https://github.com/harshop03/inventory-billing-app/blob/main/auth.js) (Sign-in and sessions), [`style.css`](https://github.com/harshop03/inventory-billing-app/blob/main/style.css) (Responsive UI styles)

## Diagram (Mermaid)

```mermaid
flowchart TD

subgraph group_experience["Browser experience"]
  node_interface["SPA interface<br/>[index.html]"]
  node_styles["Responsive UI styles<br/>[style.css]"]
end

subgraph group_identity["Authentication"]
  node_auth["Sign-in and sessions<br/>[auth.js]"]
end

subgraph group_inventory["Inventory operations"]
  node_app["App initialization and navigation<br/>[app.js]"]
  node_inventory["Inventory CRUD and filtering<br/>[app.js]"]
  node_analytics["Dashboard analytics and chart<br/>[app.js]"]
  node_backup["Inventory backup import/export<br/>[app.js]"]
  node_seed["Initial product data<br/>[mockData.js]"]
end

subgraph group_persistence["Local persistence"]
  node_authdata[("User accounts and session")]
  node_productdata[("Product records")]
  node_browser[("Browser LocalStorage")]
end

node_user(("User"))

node_user -->|"uses"| node_interface
node_interface -->|"submits credentials"| node_auth
node_auth -->|"reads and writes"| node_authdata
node_authdata -->|"persists in"| node_browser
node_interface -->|"dispatches actions"| node_app
node_app -->|"handles inventory"| node_inventory
node_app -->|"updates dashboard"| node_analytics
node_app -->|"handles backup"| node_backup
node_inventory -->|"reads and writes"| node_productdata
node_analytics -->|"summarizes"| node_productdata
node_backup -->|"imports and exports"| node_productdata
node_productdata -->|"persists in"| node_browser
node_seed -.->|"bootstraps products"| node_app
node_app -->|"renders views"| node_interface
node_styles -->|"styles"| node_interface

click node_interface "https://github.com/harshop03/inventory-billing-app/blob/main/index.html"
click node_styles "https://github.com/harshop03/inventory-billing-app/blob/main/style.css"
click node_auth "https://github.com/harshop03/inventory-billing-app/blob/main/auth.js"
click node_app "https://github.com/harshop03/inventory-billing-app/blob/main/app.js"
click node_inventory "https://github.com/harshop03/inventory-billing-app/blob/main/app.js"
click node_analytics "https://github.com/harshop03/inventory-billing-app/blob/main/app.js"
click node_backup "https://github.com/harshop03/inventory-billing-app/blob/main/app.js"
click node_seed "https://github.com/harshop03/inventory-billing-app/blob/main/mockData.js"

classDef toneNeutral fill:#f8fafc,stroke:#334155,stroke-width:1.5px,color:#0f172a
classDef toneBlue fill:#dbeafe,stroke:#2563eb,stroke-width:1.5px,color:#172554
classDef toneAmber fill:#fef3c7,stroke:#d97706,stroke-width:1.5px,color:#78350f
classDef toneMint fill:#dcfce7,stroke:#16a34a,stroke-width:1.5px,color:#14532d
classDef toneRose fill:#ffe4e6,stroke:#e11d48,stroke-width:1.5px,color:#881337
classDef toneIndigo fill:#e0e7ff,stroke:#4f46e5,stroke-width:1.5px,color:#312e81
classDef toneTeal fill:#ccfbf1,stroke:#0f766e,stroke-width:1.5px,color:#134e4a
class node_interface,node_styles,node_user toneBlue
class node_auth toneAmber
class node_app,node_inventory,node_analytics,node_backup,node_seed toneMint
class node_authdata,node_productdata,node_browser toneRose
```

## Components

### Browser experience

- [SPA interface](https://github.com/harshop03/inventory-billing-app/blob/main/index.html): `index.html`
- [Responsive UI styles](https://github.com/harshop03/inventory-billing-app/blob/main/style.css): `style.css`

### Authentication

- [Sign-in and sessions](https://github.com/harshop03/inventory-billing-app/blob/main/auth.js): `auth.js`

### Inventory operations

- [App initialization and navigation](https://github.com/harshop03/inventory-billing-app/blob/main/app.js): `app.js`
- [Inventory CRUD and filtering](https://github.com/harshop03/inventory-billing-app/blob/main/app.js): `app.js`
- [Dashboard analytics and chart](https://github.com/harshop03/inventory-billing-app/blob/main/app.js): `app.js`
- [Inventory backup import/export](https://github.com/harshop03/inventory-billing-app/blob/main/app.js): `app.js`
- [Initial product data](https://github.com/harshop03/inventory-billing-app/blob/main/mockData.js): `mockData.js`

### Local persistence

- **User accounts and session**
- **Product records**
- **Browser LocalStorage**

### Other components

- **User**

## Connections

- User → SPA interface: uses
- SPA interface → Sign-in and sessions: submits credentials
- Sign-in and sessions → User accounts and session: reads and writes
- User accounts and session → Browser LocalStorage: persists in
- SPA interface → App initialization and navigation: dispatches actions
- App initialization and navigation → Inventory CRUD and filtering: handles inventory
- App initialization and navigation → Dashboard analytics and chart: updates dashboard
- App initialization and navigation → Inventory backup import/export: handles backup
- Inventory CRUD and filtering → Product records: reads and writes
- Dashboard analytics and chart → Product records: summarizes
- Inventory backup import/export → Product records: imports and exports
- Product records → Browser LocalStorage: persists in
- Initial product data → App initialization and navigation: bootstraps products
- App initialization and navigation → SPA interface: renders views
- Responsive UI styles → SPA interface: styles