Client ↔ Express Server Simulator ↔ Shared Dataset
A single HTML foundation for future exercises. Configure ports, start the simulated server, launch the client, inspect requests/responses and keep banking data in localStorage.
Express Runtime Simulation — Educational Mode
> server is stopped
Banking Web App
Start the app to connect to the configured API port.
CLIENT
fetch()
fetch()
→
VIRTUAL NETWORK
host + port + route
host + port + route
→
EXPRESS SIMULATOR
middleware → route → data
middleware → route → data
Request Inspector
No request yet.
Response Inspector
No response yet.
Shared localStorage Dataset
| ID | Customer | Type | Amount | Status | Channel |
|---|
Important: this page simulates Express behavior inside the browser. It does not open a real TCP port. The visible
localhost:PORT is routed through a Virtual HTTP Layer so learners can safely study server configuration and request lifecycles without Node.js installation.