I am using Promise.all to handle multiple promises simultaneously, but I also need to run a function for each resolved promise. The issue I'm facing is that if I pass the function directly to the .then() of the promise, it…
var p = new Promise(function(resolve, reject) { setTimeout(function() { resolve("OK"); }, 2000); }); p.then().then(function(data) { console.log(data); }); I don't understand what happens after the first "then" is called. When the first "then" is called it returns undefined, which in turn…
Let's say I have something like: const exampleFunction = () => { const fetchActions = someArray.map(() => { dispatch(action()).then(response => { if (response?.data) { dispatch(subAction({response: response.data})) } }) }) return Promise.all(fetchActions) .then(()=> dispatch(finalAction())) } My problem is that when I…
In JavaScript, in the array of promises (can have n promises), run first n promises, when finished, run another n; Example: const promises = [Promise_1, Promise_2, Promise_3, Promise_4, Promise_5, Promise_6]; Run Promise_1 and Promise_2, when both finish, run Promise_3, Promise_4,…
I want to analyse anwser from http request, display error if needed then return data. This is what I'm doing right now: fetch(URL,{method:"GET"}) .then(async response => { await read_errors(response) }) // .then(response => { read_errors(response) }) (Both had been tried)…
I have been exploring Promises for a while in JavaScript and thought of getting better at it. I made a small blog app in Node. The scenario is whenever a user is deleted I want to delete all the blogs…
I'm looking at a functionality similar to p-props, p-all npm library but which recursively resolves promises const values = { a: () => Promise.resolve(1), b: [() => Promise.resolve(2)], c: { d: () => Promise.resolve(3), }, }; console.log(await resolve(values, { concurrency:…
So, I was recently introduced to the concept of promises and I was told for chaining purpose, we use 'then', which is actually invoked when the attached promise object is fulfilled. And, to do some work after this object is…
Take a look at this code: async function fun() { return 5; } console.log(fun()); Here I have tried to return a promise that resolves with value 5, and tried to log the returned object. I was expecting the output to…
I am trying to figure out this for a long time now. I am trying to learn about how promises work and found this code in the article How do Promises Work? by Quil. I can see how sidePromise's dependencies…