How to transfer the selected text from the browser to a third-party application?

Question

Google Chrome

Let's say I want to transfer the selected text from the browser to a third-party application. As I understand it, there are no problems to intercept text in JS, but what to do next? How to make some exe'shnik able to catch this data?

Answer 1

Pass the selected text through a request over the network - for example, localhost:8888/text=text. This is simply done with JS. Well, the application must listen to a specific address / port, and accept such requests.
UPD: Well, or as well suggested in the comments to the question - through the native messaging api.