Volatile vs Non Volatile socket.io requests

This is meant to help demonstrate the confusion as to why volatile messages are not received on the client during rapid emits from the server.

Setup

• Node: v10.9.0
• express: 4.16.3
• socket.io: 2.1.1

How to use

• Run the following commands

npm install
npm run start

• Use Chrome (or some other browser/tool that allows for watching websocket packet data) to open a new page to localhost:3000
• Ensure you are able to inspect websocket data
• Type a message that does NOT contain the word volatile
• Type a message that DOES contain volatile

Observations

• Type a message that does NOT contain the word volatile
  • Server: All 100 iterations are logged in console and emitted + the original message is emitted
  • Client: All 100 iterations + the original message are received
• Type a message that DOES contain volatile
  • Server: All 100 iterations are logged in console and emitted + the original message is emitted
  • Client: Only iteration 0 + the original message are received