sendMessage from extension background or popup to content script doesn't work

Question

I know that question has been repeatedly asked in different ways, but I tried to go through all the answers (hopefully I didn\'t miss anyone) and none of them worked for me.

Answer 1

Here's an example of a background script that sends a message to the content-script file.

background.js

chrome.tabs.sendMessage(tabs[0].id,"your message"); 

content-script/content.js

chrome.runtime.onMessage.addListener(function (response, sendResponse) {
          console.log(response);
});