Thanks, I reset all browser settings to default with extensions disabled, switched to a different theme and tried to transfer the disabled one, but it didn't help.
There are a few mentions of a similar error online, but they are beyond my knowledge unfortunately and I don't know how to use them:
"I had the same problem when replying to a message in a callback. The solution is to return true in the background message listener.
Here is a simple example of background.js. It responds to any message from popup.js.
chrome.runtime.onMessage.addListener(function(rq, sender, sendResponse) {
// set timeout to simulate any callback (even from storage.sync)
setTimeout(function() {
sendResponse({status: true});
}, 1);
// return true; // comment out this line to fix the error
});
Here is the popup.js that sends the message to the popup. You will get exceptions until you remove the "return true" line in the background.js file.
document.addEventListener("DOMContentLoaded", () => {
chrome.extension.sendMessage({action: "ping"}, function(resp) {
console.log(JSON.stringify(resp))
});
});
manifest.json, just in case :) Pay attention to the alarm permissions section!
{
"name": "TestMessages",
"version": "0.1.0",
"manifest_version": 2,
"browser_action": {
"default_popup": "src/popup.html".
},
}, "background": {
{ "scripts": [ "src/background.js",]
"persistent": false
},
{ "permissions": [
"alarms".
]
}
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Aug 22, 2019 at 11:52 am in reply to Aug 22, 2019
Aleksej Vasinov user avatar
Aleksej Vasinov
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It worked for me! In what scenario would returning false by default be useful? -
Eduardo Reis
Apr 27, 2020 at 19:59
The documentation says: This function becomes invalid when the event listener returns unless you return true. What do you mean invalid? Shouldn't it be created every time it receives a message? -
Eduardo Reis
Apr 27, 2020 at 20:01
@EduardoReis, with FALSE it can be used as an informer to notify about some event. -
Alexey Vasinov
Apr 28, 2020 at 6:21 AM
Aleksej, Could you please tell me how to include addListener code in a web project on struts 1. I am using JS, JSP, HTML, FRAMES, CSS as UI stack. just wondering where exactly it should be applied. tried adding the below snippet to the parent js file but it is not recognized. I usually don't have the listener code in the application. chrome.runtime.onMessage.addListener(function(rq, sender, sendResponse) { setTimeout(function() { sendResponse({status: true}); }, 1); alert("Inside the Background.js file"); return true; // Return true; // Return true to fix the error }); -.
sasrra
Dec 21, 2021 at 9:28 AM
Sorry, I don't know JSP to help you. Did you find the listener in your JS code? -
Aleksej Vasinov
Dec 22, 2021 at 7:18"
From here https://stackoverflow.com/questions/54126343/how-to-fix-unchecked-runtime-lasterror-the-message-port-closed-before-a-respon
