How to send message from background to popup?

Question

JavaScript

You can send a message from popup.js to the background (chrome.runtime.sendMessage), and get the response in the callback. But if the response cannot be sent immediately, then the connection is closed.
It would be convenient to make a message listener in the popup, like this:

// popup.js
chrome.runtime.onMessage.addListener(function (msg, sender, sendResponse) {
  console.log(msg);
});

To be able to send a message from the background at any time like this:

// background.js
chrome.tabs.sendMessage(id, data, function (r) {
  console.log(r);
});

Is it possible to do something similar?

Answer 1

https://developer.chrome.com/extensions/messaging#...