javascript - message passing from web page to contentscript.js in chrome extension -
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want send status value contentscript.js in chrome extension page in browser, doing adding value newly created event passing extension, but receiving value 'undefined'. code follows.
page.html
<html> <head></head> <body> <script> var go = function() { var sam=1; var event = document.createevent('event',{"details": 1}); event.foo=sam; event.initevent('hello'); document.dispatchevent(event); } </script> <a href="javascript:go();">click me</a> </body> </html> trying access value of 'foo' , 'status'(either of ), getting both values 'undefined'.
contentscript.js
document.addeventlistener("hello", function(data) { alert("test:foo "+data.foo+":"+data.status); }) please let me know how access value.
based on documentation from: [https://developer.chrome.com/extensions/messaging#external-webpage][1] - manifest.json "externally_connectable": { "matches": ["*://<your extension id>/*/page.html"] } page.html: // id of extension want talk to. var editorextensionid = "abcdefghijklmnoabcdefhijklmnoabc"; // make simple request: chrome.runtime.sendmessage(editorextensionid, {"details": 1}, function(response) { if (!response.success) handleerror(url); }); contentscript.js chrome.runtime.onmessageexternal.addlistener( function(request, sender, sendresponse) { if (sender.url === blacklistedwebsite) return; // don't allow web page access if (request.details) //process message }); 
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