how to reject wrapper promise from inside one or? in other words, how to make number ‘3’ never printed? Current output: Expected output: Answer It looks like you’re just missing a return
Tag: es6-promise
Javascript Array of Functions get auto executed
I need to make a sequence of Promises that are executed in a queue. They are dynamic so I need to put them in an array (I have found an article that explains how to). The problem is that my array of functions autoexecuted it self (version with a normal funciton): I don’t know why, an array of functions is
Firebase Realtime Database – Determine if user has access to path
I have updated my Firebase Realtime Database access rules, and have noticed some clients now tries to access paths they do not have access to. This is ok – but my problem is that my code stops after being unable to read a restricted node. I see below error in my console, and then loading of subsequent data stops: I
Unexpected unhandledRejection event for promise which rejection does get handled
Updated, I’ve now tried explaining the behavior I’m seeing, but it’d still be great to have an answer from a credible source about the unhandledRejection behavor. I’ve also started a discussion thread on Reddit. Why do I get an unhandledRejection event (for “error f1”) in the following code? That’s unexpected, because I handle both rejections in the finally section of
Await functions but do them synchrony, then call the last function
So I am working with Vue, Node and typescript. I am fetching data that all my other functions are needing, so getDataForFunction123() needs an await and its fine. Then I have 3 functions that is fetching different stuff, not depending on each other. But all answers is used by the last function updateAfterFunction123IsDone(). But when I have it like now,
Resolving an array or promises and getting the result
I’m attempting to map and format data to render it into a table. I have an array of promises that I’m attempting to resolve with Promise.all(). but it seems to not be returning the result of the promise. my code is as follows: my data copy variable only returns as : where the result is the correct result of the
Filtering an array returned from Promise
I am porting the following code: Current version should use SerialPort.list(), which returns a promise. So far, I tried something along these lines, without success: Obviously I am not quite getting what I should do. So the question is: how should I represent the same intent of former FindDevices function, using async/await or Promises? And what would be a good
Javascript: how to create an infinite-loop of promises?
I want to write in Javascript the following pseudo-code: I’ll explain it in words: asyncOperation uses a Promise, for example an AJAX call. I want that if the promise is rejected, then asyncOperation will be invoked again. Do you know how it can be done in Javascript? Answer If you’re going to use a loop, then you will have to
Two promises with a single then for either one of them
I have a function that takes an input, according to that input it will either call one of two functions (both return a promise) I want then to call the same .then() after whatever of them happened. I found Promise.any() but that doesn’t quite do what I want. For curious minds : I am working on a react-native app and
UnhandledPromiseRejectionWarning : error handling in an async callback function
I have an async callback function, which throws an error if some condition isn’t met. but I get the below error (node:77284) UnhandledPromiseRejectionWarning: Error: Not Found UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). My Code : What