javascript - Messaging between content script and popup script in Chrome extension -


i'm trying create popup chrome extension shows information dom in current page, seems require messaging. i've been able send messages background, need data specific current page, background identical popups/pages.

in popup.js, send message when dom loaded (should trigger when popup clicked?)

document.addeventlistener('domcontentloaded', function() {     chrome.runtime.sendmessage({method: "gettabledata"}, function response() {     }); });

i have listener in contentscript.js (and background.js testing)

chrome.runtime.onmessage.addlistener(function(request, sender, sendresponse) {   if(request.method == "gettabledata") {     console.log("table request found!");   } });

then, when activate popup, background console outputs table request found!, while console current page doesn't.

thanks.

you need use chrome.tabs.sendmessage instead of chrome.runtime.sendmessage send message content script.


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