How to figure out error and placement in React Native - javascript

I have an app which has react native modules working with iOS swift code , I am receiving an error of the type shown in image. Here I see no file name of the actual code file and no details of error neither the description. How one can debug such errors ? Even in the chrome extension same details are displayed .
Any help or direction will be appreciated.

Maybe an exception was thrown in an async executed code and no .catch() did handle the rejection.
And React Native Debugging docs http://facebook.github.io/react-native/docs/debugging.html#content

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Marked is not a function error in the browser

i want to create a notes app with vanilla js and i have some troubles with 'marked function. i followed a tutorial for this web app but in the browser i have this error :
Uncaught TypeError: marked is not a function
at HTMLTextAreaElement.<anonymous>
I need some help. Please :D
i tried to import it but i cant do this.
i tried some commands in terminal,but nothing helped me enter image description here

Cannot read property 'lists' of undefined

I am trying to create a web application that mimics trello. I keep getting this error and im not sure how to fix it. The code works fine in another project but not when i try and add it to this new project. ALL dependencies are updated. I am running it on google chrome. I read it might be a problem with chrome?
This is the error that I am receiving on my browser. There are no errors in my IDE.
This is the code that is producing this error. The code works fine in another IDE but once I try to integrate the component into my new app it crashes.
Make sure you are getting array in list key in "board" Props and try to use optional Channing
{
boar?.list?.map(..)
}
Your board props is undefined that's why you're getting this error.

Getting 'Uncaught TypeError: Cannot set property 'timestamp' of undefined' when using jQuery

I have an error which appear when I import jQuery lib only. I don't know what I can do. I know that it's coming from the file jquery.min.js.
Here is my simple page causing this error :
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
What I get from my console :
This error has nothing to do with jQuery or its CDN.
From the error log, you can see that the error originates from webspeed.js. Since you precise that you only import the jQuery script, this shows that this error originates from an extension.
The script tries to contact speedtest.net and the request gets blocked by CORB, thus throwing an uncaught error. This also gives a hint that the extension is made likely to be offered by speedtest.net or a related corporation. As #alon-eitan found, this is indeed the case: the speedtest extension includes such a script that has been known for triggering similar errors.
Pausing the extension or configuring it not to run on your website is likely to fix the error. I'd recommend removing it completely, as network speed analysis and much more can already be natively performed by Chrome thanks to Lighthouse.

React Native error with WebView

I'm getting an error after authorizing and getting a token from a service and keep getting the following error:
RCTJSLog> "encountered an error loading page",
{"target":19,"canGoBack":false,"domain":"WebKitErrorDomain","code":102,"loadi
ng":false,"title":"","canGoForward":false,"description":"Frame load
interrupted","url":""}
Any idea what this means? It is skipping the Web View because I have already authenticated but gives me an error screen.
Here is the GIT
It may be a bug on React Native old version.
you should update your version.
check this: https://github.com/facebook/react-native/issues/2904

App Engine Channel API's Javascript Client Isn't Using my onError Callback

I'm using App Engine's Channel API to maintain a connection between a Chrome extension and an App Engine app. You can see my Channel-related code here: https://github.com/2cloud/Chrome/blob/3fe70262ef69ae8286a057055f4108760560c47e/socket.js (The app is open source, so you can check out the repository to get an idea of how it all fits together)
My issue is, for some reason, the 401 error that App Engine throws when a token expires isn't being sent to my onError listener. I've tried just logging the error object from within onError, outside of an if statement, and still got nothing. My conclusion was that onError isn't getting called when a 401 is thrown, as the documentation says it's supposed to.
Has anyone else seen this error? Does anyone else have an idea on how to fix it?
I've reproduced this bug and started work fixing it. http://code.google.com/p/googleappengine/issues/detail?id=5685

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