How to make React Redux async action return a promise?

I have a redux action function that returns a promise. Inside that function body, there is another async function that returns a callback when it finished the call. Then I call this function in …

JS how to reject wrapper promise from inside one?

how to reject wrapper promise from inside one or? in other words, how to make number ‘3’ never printed? Current output: 1 2 3 Expected output: 1 2 new Promise(function(resolve, reject) { console….

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 …

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 …

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 …

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 …

Filtering an array returned from Promise

I am porting the following code: function FindDevices() { let ports = portLister.list(); let devices = [] for (port of ports) { try { device = new Device(port); // throws if not valid …

Javascript: how to create an infinite-loop of promises?

I want to write in Javascript the following pseudo-code: function asyncOperation() { return new Promise((resolve, reject) => { …. } } while (true) { result = asyncOperation() …

Sqlite .all() function returns an undefined promise. How can I use the result further?

I am just starting to work with JS and SQLite. And could not find any help for my specific question. I want to keep a return to use it as a foreign key in a second table. This is my function: What do I have to do so that promise does not stay undefined outside of the function? Rest of the code: My other function just creat some strings and I run a few times db.run(…) to add some tables. Answer To put it more plainly, your getIdByName function never returns anything. You need to return the value you get

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 is the proper way to throw an error from the callback function? Answer In looking at code examples for .runTransaction(), it looks like it returns a promise and will propagate a promise rejections from its callback (that’s a bit of