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I'm using VueJS and Laravel for my project. This issue started to show lately and it shows even in the old git branches.
This error only shows in the Chrome browser.
I disabled all installed extensions in Chrome - works for me.
I have now clear console without errors.
In case you're an extension developer who googled your way here trying to stop causing this error:
The issue isn't CORB (as another answer here states) as blocked CORs manifest as warnings like -
Cross-Origin Read Blocking (CORB) blocked cross-origin response
https://www.example.com/example.html with MIME type text/html. See
https://www.chromestatus.com/feature/5629709824032768 for more
details.
The issue is most likely a mishandled async response to runtime.sendMessage. As MDN says:
To send an asynchronous response, there are two options:
return true from the event listener. This keeps the sendResponse
function valid after the listener returns, so you can call it later.
return a Promise from the event listener, and resolve
when you have the response (or reject it in case of an error).
When you send an async response but fail to use either of these mechanisms, the supplied sendResponse argument to sendMessage goes out of scope and the result is exactly as the error message says: your message port (the message-passing apparatus) is closed before the response was received.
Webextension-polyfill authors have already written about it in June 2018.
So bottom line, if you see your extension causing these errors - inspect closely all your onMessage listeners. Some of them probably need to start returning promises (marking them as async should be enough). [Thanks #vdegenne]
If you go to chrome://extensions/, you can just toggle each extension one at a time and see which one is actually triggering the issue.
Once you toggle the extension off, refresh the page where you are seeing the error and wiggle the mouse around, or click. Mouse actions are the things that are throwing errors.
So I was able to pinpoint which extension was actually causing the issue and disable it.
Post is rather old and not closely related to Chrome extensions development, but let it be here.
I had same problem when responding on message in callback. The solution is to return true in background message listener.
Here is simple example of background.js. It responses to any message from popup.js.
chrome.runtime.onMessage.addListener(function(rq, sender, sendResponse) {
// setTimeout to simulate any callback (even from storage.sync)
setTimeout(function() {
sendResponse({status: true});
}, 1);
// return true; // uncomment this line to fix error
});
Here is popup.js, which sends message on popup. You'll get exceptions until you un-comment "return true" line in 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 on 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"
]
}
To me i was using a VPN extension called
Free VPN for Chrome - VPN Proxy VeePN It was causing the error after disabling it only ... the error disappeared
This error is generally caused by one of your Chrome extensions.
I recommend installing this One-Click Extension Disabler, I use it with the keyboard shortcut COMMAND (⌘) + SHIFT (⇧) + D — to quickly disable/enable all my extensions.
Once the extensions are disabled this error message should go away.
Peace! ✌️
If error reason is extension use incognito Ctrl+Shift+N. In incognito mode Chrome does not have extensions.
UPD. If you need some extension in incognito mode e.g. ReduxDevTools or any other, in extension settings turn on "Allow in incognito"
Make sure you are using the correct syntax.
We should use the sendMessage() method after listening it.
Here is a simple example of contentScript.js It sendRequest to app.js.
contentScript.js
chrome.extension.sendRequest({
title: 'giveSomeTitle', params: paramsToSend
}, function(result) {
// Do Some action
});
app.js
chrome.extension.onRequest.addListener( function(message, sender,
sendResponse) {
if(message.title === 'giveSomeTitle'){
// Do some action with message.params
sendResponse(true);
}
});
For those coming here to debug this error in Chrome 73, one possibility is because Chrome 73 onwards disallows cross-origin requests in content scripts.
More reading:
https://www.chromestatus.com/feature/5629709824032768
https://www.chromium.org/Home/chromium-security/extension-content-script-fetches
This affects many Chrome extension authors, who now need to scramble to fix the extensions because Chrome thinks "Our data shows that most extensions will not be affected by this change."
(it has nothing to do with your app code)
UPDATE: I fixed the CORs issue but I still see this error. I suspect it is Chrome's fault here.
In my case it was a breakpoint set in my own page source. If I removed or disabled the breakpoint then the error would clear up.
The breakpoint was in a moderately complex chunk of rendering code. Other breakpoints in different parts of the page had no such effect. I was not able to work out a simple test case that always trigger this error.
I suggest you first disable all the extensions then one by one enable them until you find the one that has caused the issue in my case Natural Reader Text to Speech was causing this error so I disabled it. nothing to do with Cross-Origin Read Blocking (CORB) unless the error mention Cross-Origin then further up the tread it is worthwhile trying that approach.
I faced the same error in my react project running.
That error coming from my chrome
IObit Surfing Protection
2.2.7
extensions. That extension off my error was solved.
If you face same like that error, 1st turn off your chrome ad blocker or any other extensions while running.
Late here but in my case it was Kaspersky Cloud Protection Extension. I disabled it. It worked all good.
The cause of this issue is related to one of your chrome extensions, not CORS or CORB. To fix that you can turn off each and every chrome extension you installed.
Norton Safe Web extension for chrome is throwing this error message for me. After I disabled this extension, the error message disappeared.
Just cleaning site cookies worked here.
In my case i had to switch off "Adblock extension" from chrome.
Suddently i have this problem, which is the error on the title of this question...i was trying to implement the radlistview and honnestly i really don´t know what i did, the complete error is this:
JavaScript error:
file:///app/tns_modules/nativescript-ui-sidedrawer/ui-sidedrawer.js:263:34: JS ERROR TypeError: this._ios.setMainView is not a function. (In 'this._ios.setMainView(content)', 'this._ios.setMainView' is undefined)
Can anyone please tell me what is wrong?
Regards
I'm using a custom Modernizr build, v3.3.0. I've created a simple JSFiddle example to illustrate: https://jsfiddle.net/cqkg7x45/6/.
console.log(Modernizr);
will show the Modernizr object, and when I inspect it in the JS console I can see "videoautoplay" is a property with a value of "true".
But, when I do
console.log(Modernizr.videoautoplay)
it returns "undefined".
I was originally seeing this issue in a WordPress theme I'm developing, but was also able to recreate in JSFiddle and a separate stand-alone HTML page. Also, Modernizr is putting the "videoautoplay" class on my HTML tag, even when I know the device does not support that feature (iPhone 5).
Update: This issue appears to be happening in Chrome (v47.0.2526.106), but not Firefox (v43.0.2).
I'm going to answer my own question in case anyone else runs into this problem. I found the solution on this SO post: How do I detect if the HTML5 autoplay attribute is supported?.
Since this is an "async" test you can't access the property using the syntax
Modernizr.videoautoplay
You have to use the .on() function, as shown in the above SO post:
Modernizr.on('videoautoplay', function(result){
if(result) {
alert('video autoplay is supported');
} else {
alert('video autplay is NOT supported');
}
});
I'm trying to pause every instance of an HTML 5 <video> tag on a page after an event is fired using:
jQuery("video").each (function() { this.pause(); })
Works in all browsers EXCEPT Safari for Windows 5.1.7, which throws:
TypeError: 'undefined' is not a function (evaluating 'this.pause()')
Why do Safari throws this exception and how can I avoid it?
edit:
so, given you are using video.js, maybe something like this?
jQuery("video").each (function() {
_V_($(this).id).pause(); //make sure all your video tags have an id attribute
});
https://github.com/zencoder/video-js/blob/master/docs/api.md
I made a simple extension that contains a button, that when clicked, executes the following code:
chrome.experimental.clear.cache('everything', function() {
});
but the callback function never seems to get called. Am I using this API wrong or is it just broken?
Here's a link to the API doc for it:
http://code.google.com/chrome/extensions/experimental.clear.html#method-cache
Thanks!
The API has changed to chrome.experimental.browsingData.
I've just landed the documentation updates to go along with the code change: http://code.google.com/chrome/extensions/trunk/experimental.browsingData.html
Here's the most up to date documentation (chrome.browsingData.removeCache):
http://developer.chrome.com/trunk/extensions/browsingData.html#method-removeCache