# munshikumar123/expanz architecture

> Architecture diagram of the GitHub repository munshikumar123/expanz, 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/munshikumar123/expanz
- Repository: https://github.com/munshikumar123/expanz

## Overview

This is a small React shopping-cart checkout demo. A shopper reviews a preset order, adjusts quantities or removes items, enters customer addresses, and then submits card details against hard-coded sample values. Order totals flow through App to Payment. Addresses, cart contents, and payment fields are held in component state; the sampled code shows no backend, persistent store, or payment-provider integration. The README describes Create React App tooling, not additional product capabilities.

Main entry points: [`src/App.js`](https://github.com/munshikumar123/expanz/blob/main/src/App.js) (Checkout App), [`src/components/Payment.js`](https://github.com/munshikumar123/expanz/blob/main/src/components/Payment.js) (Payment Form), [`src/components/order/Order.js`](https://github.com/munshikumar123/expanz/blob/main/src/components/order/Order.js) (Order Cart), [`src/index.js`](https://github.com/munshikumar123/expanz/blob/main/src/index.js) (React Entry)

## Diagram (Mermaid)

```mermaid
flowchart TD

subgraph group_app["Application"]
  node_entry["React Entry<br/>[index.js]"]
  node_app_ui["Checkout App<br/>[App.js]"]
end

subgraph group_checkout["Checkout"]
  node_customer["Customer Details<br/>[CustomerDetails.js]"]
  node_order["Order Cart<br/>[Order.js]"]
  node_payment["Payment Form<br/>[Payment.js]"]
end

subgraph group_reference["Payment Options"]
  node_months["Month Options<br/>[Month.json]"]
  node_years["Year Options<br/>[Year.json]"]
end

node_shopper(("Shopper"))

node_shopper -->|"opens app"| node_entry
node_entry -->|"mounts"| node_app_ui
node_app_ui -->|"renders"| node_customer
node_app_ui -->|"renders"| node_order
node_app_ui -->|"renders"| node_payment
node_order -->|"reports total"| node_app_ui
node_app_ui -->|"passes total"| node_payment
node_shopper -->|"enters address"| node_customer
node_shopper -->|"updates cart"| node_order
node_shopper -->|"submits card"| node_payment
node_payment -->|"reads options"| node_months
node_payment -->|"reads options"| node_years

click node_entry "https://github.com/munshikumar123/expanz/blob/main/src/index.js"
click node_app_ui "https://github.com/munshikumar123/expanz/blob/main/src/App.js"
click node_customer "https://github.com/munshikumar123/expanz/blob/main/src/components/CustomerDetails.js"
click node_order "https://github.com/munshikumar123/expanz/blob/main/src/components/order/Order.js"
click node_payment "https://github.com/munshikumar123/expanz/blob/main/src/components/Payment.js"
click node_months "https://github.com/munshikumar123/expanz/blob/main/src/constants/Month.json"
click node_years "https://github.com/munshikumar123/expanz/blob/main/src/constants/Year.json"

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_entry,node_app_ui toneBlue
class node_customer,node_order,node_payment toneAmber
class node_months,node_years toneMint
class node_shopper toneIndigo
```

## Components

### Application

- [React Entry](https://github.com/munshikumar123/expanz/blob/main/src/index.js): `src/index.js`
- [Checkout App](https://github.com/munshikumar123/expanz/blob/main/src/App.js): `src/App.js`

### Checkout

- [Customer Details](https://github.com/munshikumar123/expanz/blob/main/src/components/CustomerDetails.js): `src/components/CustomerDetails.js`
- [Order Cart](https://github.com/munshikumar123/expanz/blob/main/src/components/order/Order.js): `src/components/order/Order.js`
- [Payment Form](https://github.com/munshikumar123/expanz/blob/main/src/components/Payment.js): `src/components/Payment.js`

### Payment Options

- [Month Options](https://github.com/munshikumar123/expanz/blob/main/src/constants/Month.json): `src/constants/Month.json`
- [Year Options](https://github.com/munshikumar123/expanz/blob/main/src/constants/Year.json): `src/constants/Year.json`

### Other components

- **Shopper**

## Connections

- Shopper → React Entry: opens app
- React Entry → Checkout App: mounts
- Checkout App → Customer Details: renders
- Checkout App → Order Cart: renders
- Checkout App → Payment Form: renders
- Order Cart → Checkout App: reports total
- Checkout App → Payment Form: passes total
- Shopper → Customer Details: enters address
- Shopper → Order Cart: updates cart
- Shopper → Payment Form: submits card
- Payment Form → Month Options: reads options
- Payment Form → Year Options: reads options