Chrome extension: sendMessage doesn't work

Question

I\'ve already read the documentation from Google on \'message passing\' a few times and have probably looked at over 10 other questions with the same problem and already tri

Answer 1

There are several issues in your code.

Chrome doesn't allow inline scripts in extensions. You must divide your popup.html to script + HTML:

// popup.html






// popup.js
chrome.tabs.query({active: true, currentWindow: true}, function(tabs) {
    var tab = tabs[0];  // do not forget to declare "tab" variable
    chrome.tabs.sendMessage(tab.id, {
        greeting: "Can you hear me?"
    }, function(response){});
});