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Questions tagged [promise.all]

104 questions
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Working with multiple API calls from a Node/Express intermediate API, trying to use promise.all()

I am discovering all kinds of gaps in my understanding during this project. I am working on building an intermediate API server. Some end-points take an array of info, then make an external call for each piece of info, then do some manipulation of…
Jeffrey Bentley
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how to use Promise.All with forEach loop in js

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 all results…
art vanderlay
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Typescript doesn't infer types for Promise.all()

Please explain someone the reason and mechanics of that TS doesn't match the types for a (string vs 'test') matching those for b at the same time. How can I solve this? The playground is here. Thank you in advance. (async () => { const [a]:…
Fox Amadeus
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Js await function inside a map

I have an array of category ids in order, I have to make a map and fetch the items from these categories and in the end keep the original order of the array what I've been doing: const info = [] Promise.all(categoryItem.next_steps.map((next_step) =>…
Thyi
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When does Promise.all actually queue a microtask?

So i am new to promises and i am trying some stuff to figure out what's going on under the hood. From what i read a Job is queued to the Microtask queue by .then immediately after the promise the method was chained to…
Sasho32
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How do I use Promise.all results in a React component?

I need to figure out how to fetch multiple GeoJSON files from my public folder and render the coordinates in a React component. Here is the relevant code snippet: export const CoordinatesComponent = () => { const [data, setData]: any =…
saganaga
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Javascript Promise.all execution sequence question

When I execute the below Javascript promise.all() code I get the output as hi 50 But is what I was expecting the output to be 50 hi Can some one please explain me why "Hi" appeared first and then 50 Below is the code let p1 =…
priyanka sunke
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NodeJS: How to use Promise.all in order to execute a method once multiple requests are executed?

I am having a NodeJS project, where I have array of N parameters and I need to call an endpoint N times (once with each parameter). Then I need to listen once all the responses are returned and to execute a certain function only once all the results…
delux
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Promise.all with external resolve never resolves

I'm working on a SPA (Single Page Application) project and need to load files in a dynamic and controlled way (CSS, HTML and JS) I created the structure below (in this example only for CSS), but although the files are injected into the page, the…
hericklr
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Console.log as HTTP requests are happening in promise array

I am making an HTTP request to an API for as many entries there are on an array. What I am trying to do is console.log each time is doing a request but I am unable to make the promise log it as it happens, it'll wait for all to be done and then it…
Álvaro
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Syntax for using Promise.all() result to perform another query

I have a Promise.all() that performs two queries one after the other. In the result of the Promise.all() I want to perform a third query using the result from the second query. How would I create a function() that I can cleanly use inside the…
DIRTY DAVE
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fetch result from API returns undefined

I am trying to fetch data from an API but keep getting undefined as result. I am using promise.all to chain API calls, and then chaining promises to do other operations on data. I seem to be unable to get my results to be passed to state. Here's the…
Eke Eke
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How do I convert a JS promise to another object

So I have an asynchronous function that I need to call a number of times. Naturally, I would like to use Promise.all const promises = []; ids.forEach((id) => { stockoutPromises.push( asyncFunc(id), }); }); results[] =…
Kramer
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What is the proper way to write conditional statement inside flatMap with Promise.all in Javascript

I am working on a flatMap with Promise.all; there are two condition inside flatMap, the originalObj is for checking whether originalObj.state is false or not, then implement the insertRealStartTime, and in every event, I will implement the…
TungTung
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Include Images in html string to pdf file download

i have the following function which takes lots of html strings and converts them into pdf files: async signedAgreements(documentstoDownload) { this.loading = true; // Create an array to hold the promises of each download operation …
BranchCoder
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