Start server:

node --inspect index.js

Note: you might need to free up the port

fuser -k 8080/tcp

• Point Chrome to the server at localhost:8080
• Open DevTools (A).
• Click on the Node.js icon to open a second DevTools (B) instance.
• Reload the page.
• Set a break point on the first line of CaseRequest.
• Click on a button to send request.
• Step in DevTools (A) until the fetch request.
• Observe switch to DevTools (B).
• Step a bit in server code.
• Continue execution.
• Observe switch back to DevTools (A).
• Step a bit more.