Unresolved (waiting for response) unidentified

Question

Unresolved (waiting for response) unidentified

I encountered a perplexing error in Chrome and I am unable to identify its source: https://i.sstatic.net/f9Blt.png

The only clue I have is that after refactoring approximately 10,000 lines of code, this error surfaced. It occurred during the middle of the refactoring process in an Angular project. Despite my knowledge of handling promises in Angular and attempts to use an error handler, such as:

window.addEventListener('unhandledrejection', function (promiseRejectionEvent) {
  console.log(promiseRejectionEvent);
  console.log('here!!!!!')
});
window.onerror = function (promiseRejectionEvent) {
  console.log(promiseRejectionEvent);
  console.log('AHHHH')
};

Unfortunately, neither approach successfully caught the error. The origin of this recurring error remains a mystery to me, manifesting each time I reload the page.

Curiosity led me to visit the link indicated by the error in Chrome, but it was unhelpful in shedding light on the issue.

Interestingly, this error does not occur in Firefox.

angular typescript google-chrome promise

Answer 1

Answer №1

The error message Uncaught (in promise) is related to zone.js:

Check out this link for more information

To troubleshoot, use chrome dev tools to search all files or jump directly to the zone.js file and locate where 'Uncaught' is mentioned. Set a breakpoint, reload the page, and inspect the callstack once the breakpoint is triggered.

This should guide you towards finding a solution to the issue at hand.

Answer 2

The error message Uncaught (in promise) is related to zone.js:

Check out this link for more information

To troubleshoot, use chrome dev tools to search all files or jump directly to the zone.js file and locate where 'Uncaught' is mentioned. Set a breakpoint, reload the page, and inspect the callstack once the breakpoint is triggered.

This should guide you towards finding a solution to the issue at hand.

Answer 3

Answer №2

Consider running your code in a private browsing window.

I unearthed the solution, although it left much to be desired. It turned out that a Microsoft Office extension was sneakily inserting something that was causing issues with zone.js, but not entirely. How this occurred is beyond me.

Identifying the issue:

If you set up Chrome to pause on exceptions, you will come across this error. The problem originated from a content.js file that isn't even part of my project, which immediately raised some red flags. Upon inspecting the sources tab and locating the file, I discovered that the error was coming from the Office extension. So, if you encounter the Uncaught (in promise) undefined error, it's likely being caught by zone.js error handling mysteriously. Although the specifics evade me, I recommend trying to run your code in a private browsing session.

Answer 4

Consider running your code in a private browsing window.

I unearthed the solution, although it left much to be desired. It turned out that a Microsoft Office extension was sneakily inserting something that was causing issues with zone.js, but not entirely. How this occurred is beyond me.

Identifying the issue:

If you set up Chrome to pause on exceptions, you will come across this error. The problem originated from a content.js file that isn't even part of my project, which immediately raised some red flags. Upon inspecting the sources tab and locating the file, I discovered that the error was coming from the Office extension. So, if you encounter the Uncaught (in promise) undefined error, it's likely being caught by zone.js error handling mysteriously. Although the specifics evade me, I recommend trying to run your code in a private browsing session.

Answer 5

Answer №3

If you receive an error message that indicates there is a problem, but you are unable to pinpoint it, consider inspecting the responsible router for the specific route /app/outbound/cell-dial or any related route guard functions.

To delve deeper into routing concepts and explore router guards further, refer to: https://angular.io/guide/router

You can also try the following troubleshooting steps:

Reinstall your dependencies by running:

// Delete
rm -rf node_modules/
npm install

Review the differences in your repository from the last commit/merge/pull operation
Verify your dependency versions as inconsistencies may exist if they were not set up correctly

To address this issue, follow these common practices (which you may already be familiar with):

getAllPosts().then(response => {
    console.log(response);
}).catch(e => {
    console.log(e);
});

For additional insights on handling errors using promises, visit: https://developer.mozilla.org/de/docs/Web/JavaScript/Reference/Global_Objects/Promise/catch

You can also utilize async/await like so:

//some async function
try {
    let response = await getAllPosts();
} catch(e) {
    console.log(e);
}

Answer 6

If you receive an error message that indicates there is a problem, but you are unable to pinpoint it, consider inspecting the responsible router for the specific route /app/outbound/cell-dial or any related route guard functions.

To delve deeper into routing concepts and explore router guards further, refer to: https://angular.io/guide/router

You can also try the following troubleshooting steps:

Reinstall your dependencies by running:

// Delete
rm -rf node_modules/
npm install

Review the differences in your repository from the last commit/merge/pull operation
Verify your dependency versions as inconsistencies may exist if they were not set up correctly

To address this issue, follow these common practices (which you may already be familiar with):

getAllPosts().then(response => {
    console.log(response);
}).catch(e => {
    console.log(e);
});

For additional insights on handling errors using promises, visit: https://developer.mozilla.org/de/docs/Web/JavaScript/Reference/Global_Objects/Promise/catch

You can also utilize async/await like so:

//some async function
try {
    let response = await getAllPosts();
} catch(e) {
    console.log(e);
}

Answer 7

Answer №4

One way to tackle this issue is by setting a breakpoint where the stacktrace in the console directs you. From there, follow the call stack upwards until you pinpoint the area in your code where a Promise is being rejected.

In my experience, the problem stemmed from using Promise.reject() within a function without enclosing it in a try/catch block. Everything seemed to be functioning properly until we introduced await into the mix, causing an unhandled promise exception that eventually led to issues in zone.js.

Answer 8

One way to tackle this issue is by setting a breakpoint where the stacktrace in the console directs you. From there, follow the call stack upwards until you pinpoint the area in your code where a Promise is being rejected.

In my experience, the problem stemmed from using Promise.reject() within a function without enclosing it in a try/catch block. Everything seemed to be functioning properly until we introduced await into the mix, causing an unhandled promise exception that eventually led to issues in zone.js.

Unresolved (waiting for response) unidentified

Answer №1

Answer №2

Answer №3

Answer №4

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