How to resume data transfer after loss of internet connection?

Question

JavaScript

Good time of the day. How to continue sending unsent messages to the server after the Internet connection is lost. As an example: there is a chat server, there is a cordova client for android. The client writes writes messages sends them to the chat and suddenly notices that all the messages that he sent were not sent because his Internet fell off. Please tell me how to implement it correctly. Thanks in advance.

Answer 1

webSocket, cache of messages on the client side, so that unsent messages are not lost, and a program that will try to send messages until it sends