I have this code that executes a function to promise 4 public methods, the public methods have code to return nothing if they don't meet a certain criteria. If one of the results is empty (undefined), I want it to…
I have an object with multiple properties and a few of them contain promises. Now i want to wait until every promise is resolved and then the properties should contain the value of the promise This is what i have…
after reviewing a number of questions around for/foreach loops I am still not able to get an output of a promise.all batch of functions. The goal is to call each iteration of doSleepNow() synchronously, but wait in the Promise.all until…
the code snippet likes below: console.log('test') async function async1() { console.log('before wait'); await wait(); console.log('after wait'); } async function wait() { try { return await new Promise((res, rej) => { console.log('wait'); rej('reject'); }); } catch (reason) { console.log(reason); } }…
New to development. Trying to use Firebase Messaging with a ReactJS app. I want to add the token to my headers so I can send to the backend: instance.interceptors.request.use( (config) => { const token = TokenService.getLocalAccessToken(); const firebaseToken = getNewToken();…
I have an axios function, which I want to call several times, then I want to firstly sort received data and then store it. But now all my promises results are undefined. const arr = {...checkbox}; const keys = Object.keys(arr).filter((k)=>{…
I am trying to understand promise error handling for the cases of thrown errors and exceptions (code bugs) in the promise executor, comparing them to reject. This is for node.js. It seems like there are clear differences in the handling…
Am trying to create a custom asynchronous function asyncFunc in Nodejs that behaves like built in asynchronous JavaScript functions such as setTimeout. However, the function behaves like a synchronous function. function asyncFunc(i, n){ return new Promise(function(resolve, reject){ // while loop…
. Hello, with the help of the following code, I try to retrieve a table of "Etablissement" via asynchronous queries. The last line is underlined in red with this message: Type 'Promise<(string[] | undefined)[]>' is missing the following properties from…
I am trying to create a typewriter effect using javascript, I want to write the first sentence first, then second sentence and so on. I tried doing it using using setTimeout and it is working fine, but I want to…