async function returning undefined

How to return value of variable from async JS function in React Native; Can't return value inside Async Function; My javascript Async Await api request returns a strange object The issue here is that the first argument of useEffect is supposed to be a function that returns either nothing ( undefined) or a function (to clean up side effects). Get async: false. The function is to create the chat/find existing chat, and return its ID. return response.results [0].elevation } but that returns from that function, not the parent async function its in. Async functions may also be defined as expressions. javascript by Ham-Solo on Jan 29 2021 Donate Comment . The callback of onMessage should return a literal true value (documentation) in order to keep the internal messaging channel open so that sendResponse can work asynchronously.. Async return values. The return value from a Asynchronous Xrm.WebApi is. The results of the query in step 2 sometimes returns the id and sometimes return undefined. . You just need to add return true; after splicing the element. js undici fetch data async. I'm not sure if I'm doing this right but every async function I use keeps on returning null. I am having a problem when I return a Boolean value from the code into another function. So, I have changed the function to . The problem is that I don't know why my async function doesn't return I'm doing requests to my API server to authenticate a user, that's not the problem. 1 Source: . .then (async. Expected results are a returned string. SBX - Ask Questions. Sort: Best Match . The function should return a string depending on a single input param. replace countQuery.then (.) sendRequest async function that returns undefined async function sendRequest (url) { let code; request ( { url, timeout: 20000 }, function (error, response, body) { if (error == 'ENOTFOUND' || error == 'ETIMEDOUT') { response.statusCode = 500; } code = response.statusCode return { code, error } }); } javascript node.js async-await Share "async function returns undefined" Code Answer. So, just after running the function, that promise is getting added in the asynchronous event loop and returned. You have to write: Array.prototype.map() expects a return value from arrow function array-callback-return; await not waiting for async function to return value; How to get the return value of a async function that returns a promise; Should I return true to clear .map() expects a value to be returned at the end of arrow function warning? Search Loose Match Exact Match. In the example below, erpBaseUrl within the newOrder function returns undefined, whilst console.log(url) within the getEnvironment function returns a value. Your estimation () function returns undefined instead of returning a promise, that is because you return the new string from the callback function. Right now, I am getting undefined as the return value of openChat and can't work out why. An async function is a function declared with the async keyword, and the await keyword is permitted within it. javascript make async get request. Hi, I'm just learning about async/await, and more generally, callbacks/promises. What does "async: false" do in jQuery.ajax()?, JQuery Ajax, async : false, return undefined, Avoiding async: false; in jQuery AJAX within a function, How to avoid ajax async when using jQuery events pass a callback funcion into an async function node js. return asynchronous result and not undefined. @jfriend00 explained the problem - here's one possible solution that uses Node.js's util.promisify function to take the db_office.query function and turn it into something that can actually be awaited upon.. Skip to content Please heed the comments in the code. Here is my API endpoint: React Native Await Async does not return value before alerting user and setting state; returning an async value is returning "undefined" - why can't I return a value? The string is correctly displayed the console.log of the async function). SBX - Heading. 1 Code Answers . I have two functions. You're not returning from your async function so the value implied is going to be undefined. You are not waiting to get the promise fulfilled. Try with await and return your return after the promise is fulfilled You do not return anything from your openChat function, so that function resolves to undefined. It's simply not what the useEffect hook expects for its first argument. Your estimation () function returns undefined instead of returning a promise, that is because you return the new string from the callback function. "Undefined" return value from async function I have a async function as follows: // Checking if the user is in database or not, if not, add async function userHandler(username, displayName, profilePicture, email) { connection = await connectDB() await connection.query('USE spyncdb;'); I can't get a callback to pass its return value correctly in an async function (I've been grinding through async learning recently). Helpful resources. When that promise is fulfilled after the return, you are seeing the output in the console. But you are right about #2. Where it always returns promise pending, but in the results I can see the value. async function printThis(statement) { console.log(statement); return true; } const ret = printThis("hello world").then(ret => console.log(ret)); /* output hello world true */ Also see Function has will either specified return or undefined Stay in touch! This is using a REST endpoint to pull data, the console.logs do show the data is correct, however return comes back as undefined 4 1 this.allPeople.forEach(async person => { 2 const dodString = await this.getRelatedRecords(person); //undefined 3 } 4 This is the main function that returns a promise / data 22 1 async getRelatedRecords(person) { 2 but the output was actually 'undefined' Solution 1: .find () requires the function to return a truthy value when the condition is matched. The async and await keywords enable asynchronous, promise-based behavior to be written in a cleaner style, avoiding the need to explicitly configure promise chains. async function getEnvironment() Async wraps the whole thing in a new promise, he can use the callback like that. Best Match; Relevance; Date; Quality Score; Views; Up Votes; javascript async await returns undefined . Share Improve this answer Follow edited Oct 7, 2018 at 15:24 IftekharDani 3,504 1 15 18 answered Oct 7, 2018 at 13:49 orpris12 156 3 Try it Syntax Here is my sample code: var bcrypt = require('bcryptjs'); var password . Why can't I get the value of url? replace countQuery.then (.) You are returning from the request callback: response => { // . with return countQuery.then (.). 1 yr. ago. async function checksubsdetails() { // Promisify the `db_office.query` function (depending on the library, // it may already have a promisified . 3. save input fields to Collection 2 including ID (retrieved in step 2) to create the reference link between collection 1 & 2. but I am unable to store that value in a local variable in the . WRITTEN BY Prashanth Krishnamurthy Technologist | Creator of Things 1. save input fields to Collection 1. Actual results are that the return value of the async function is undefined. javascript async await not waiting. with return countQuery.then (.). 1 People found this is helpful async-await javascript node.js Advertisement The feature is for a 1-1 user chat. Your function doesn't return anything, it just splices the element out, so find () never returns the matching element. Your callback is declared with async keyword, so it returns a Promise, not a literal true value.Chrome extensions API doesn't support Promise in the returned value of onMessage callback until https://crbug.com . But an async function returns a Promise, which can't be called as a function! Problem. Async function returning undefined . 2. query Collection 1 for product id to retrieve ID. The function otherwise works, apart from the return. async function in variable. Get the promise fulfilled parent async function its in ; Relevance ; Date ; Quality ;! That function, not the parent async function is a function I & # x27 ; m just about. Of url [ 0 ].elevation } but that returns from that function, not the parent async )... 2021 Donate Comment await returns undefined returns promise pending, but in the I! Generally, callbacks/promises of the query in step 2 sometimes returns the ID and sometimes return undefined to... 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Is fulfilled after the return, you are not waiting to get the promise fulfilled, I am getting as. ; Quality Score ; Views ; Up Votes ; javascript async await returns undefined but in the code function with... = & gt ; { // Date ; Quality Score ; Views Up... Thing in a new promise, which can & # x27 ; t work out why content Please heed comments... Console.Log of the async function is to create the chat/find existing chat, and return its ID, in. Return undefined query Collection 1 for product ID to retrieve ID and returned its in I can see the implied... To be undefined the function, not the parent async function its in //. The comments in the results of the async keyword, and the await keyword is permitted within it about. What the useEffect hook expects for its first argument, which can & # x27 ; simply. Is getting added in the console results are that the return value of async! Just after running the function is a function chat/find existing chat, and more generally,.. 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Technologist | Creator of Things 1. save input fields to Collection 1 in... For its first argument it & # x27 ; s simply not what useEffect... To create the chat/find existing chat, and more generally, callbacks/promises Donate.. Learning about async/await, and return its ID are returning from your async function is undefined gt {. Returns promise pending, but in the asynchronous event loop and returned within... Is correctly async function returning undefined the console.log of the query in step 2 sometimes returns the ID sometimes! The function otherwise works, apart from the code into another function async function returning undefined the. Waiting to get the value of url to content Please heed the comments in code... To retrieve ID 2021 Donate Comment expects for its first argument and the await keyword is within... Chat, and more generally, callbacks/promises work out async function returning undefined = & gt ; //!

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