chrome.runtime.sendMessage not working in Chrome Extension

Question

I am trying to create a new extension. I was able to use the chrome.runtime.sendMessage function a while back but right now, I have tried everything and it still is not able

Answer 1

Per the text at the end of https://developer.chrome.com/extensions/messaging#simple if you return true from onMessage handler in background.js then you can call sendResponse asynchronously.