The function should return a string depending on a single input param. The function otherwise works, apart from the return. 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. Async return values. When that promise is fulfilled after the return, you are seeing the output in the console. Get async: false. 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? So, I have changed the function to . 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. 1. save input fields to Collection 1. Where it always returns promise pending, but in the results I can see the value. 1 Code Answers . Search Loose Match Exact Match. @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.. The results of the query in step 2 sometimes returns the id and sometimes return undefined. I'm not sure if I'm doing this right but every async function I use keeps on returning null. You are returning from the request callback: response => { // . It's simply not what the useEffect hook expects for its first argument. Try with await and return your return after the promise is fulfilled I am having a problem when I return a Boolean value from the code into another function. async function checksubsdetails() { // Promisify the `db_office.query` function (depending on the library, // it may already have a promisified . with return countQuery.then (.). javascript async await not waiting. js undici fetch data async. 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 1 Source: . async function in variable. But you are right about #2. 3. save input fields to Collection 2 including ID (retrieved in step 2) to create the reference link between collection 1 & 2. 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 . The function is to create the chat/find existing chat, and return its ID. Skip to content You do not return anything from your openChat function, so that function resolves to undefined. In the example below, erpBaseUrl within the newOrder function returns undefined, whilst console.log(url) within the getEnvironment function returns a value. Please heed the comments in the code. with return countQuery.then (.). Async functions may also be defined as expressions. I have two functions. .then (async. Here is my sample code: var bcrypt = require('bcryptjs'); var password . Helpful resources. You have to write: 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.. WRITTEN BY Prashanth Krishnamurthy Technologist | Creator of Things 1 People found this is helpful async-await javascript node.js Advertisement The return value from a Asynchronous Xrm.WebApi is. The string is correctly displayed the console.log of the async function). Actual results are that the return value of the async function is undefined. Sort: Best Match . "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;'); Expected results are a returned string. You just need to add return true; after splicing the element. replace countQuery.then (.) "async function returns undefined" Code Answer. Hi, I'm just learning about async/await, and more generally, callbacks/promises. but I am unable to store that value in a local variable in the . but the output was actually 'undefined' Solution 1: .find () requires the function to return a truthy value when the condition is matched. 1 yr. ago. 2. query Collection 1 for product id to retrieve ID. . Your function doesn't return anything, it just splices the element out, so find () never returns the matching element. 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 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 An async function is a function declared with the async keyword, and the await keyword is permitted within it. The feature is for a 1-1 user chat. javascript make async get request. SBX - Heading. pass a callback funcion into an async function node js. 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! SBX - Ask Questions. javascript by Ham-Solo on Jan 29 2021 Donate Comment . 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. Your estimation () function returns undefined instead of returning a promise, that is because you return the new string from the callback function. 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 Why can't I get the value of url? But an async function returns a Promise, which can't be called as a function! Right now, I am getting undefined as the return value of openChat and can't work out why. So, just after running the function, that promise is getting added in the asynchronous event loop and returned. I can't get a callback to pass its return value correctly in an async function (I've been grinding through async learning recently). Your estimation () function returns undefined instead of returning a promise, that is because you return the new string from the callback function. replace countQuery.then (.) Async wraps the whole thing in a new promise, he can use the callback like that. return response.results [0].elevation } but that returns from that function, not the parent async function its in. Async function returning undefined . 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? 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