Goal

Send message from my content script to my background script whenever the tab changes. The message includes text queried from DOM in content script

Heres what I have so far

Contentscript.js

 chrome.runtime.sendMessage(null, workspaceName); // heres where I send the name

background.js and `popUp.js

chrome.runtime.onMessage.addListener((msg, sender, sendResponse) => {
    workspaceName = msg;
    console.log(`Workpspace: ${msg}`);
});

This only runs on page load/refresh and when extension is open