I am running multiple axios.get() calls in my Vue.js app. I would like to call another function after all of the fetches have received responses. How can I do this? I have read about Promise.all(). If this would help me, please advise on how to incorporate Promise.all into my code. If I add async and await to…
Tag: promise
TypeError: fs.createReadStream is not a function
I prefer to use promises rather than callbacks so I’ve used util.promisify. I’ve received TypeError: fs.createReadStream is not a function at const attachments = {attachment: fs.createReadStream(‘kitty.png’)}; line. How can I solve that? Answer fs.promises is not a superset of fs. Whil…
Async Promise returns undefined or zone aware promise
When calling a function that returns a promise, comes back as undefined unless async operators are removed, then returns ZoneAwarePromise, but contains no data. I know the query returns data when the function executes, it however does not seem to pass that data to the actual return part of the function call. …
Javascript: Error in Promise implementation
I’m trying to perform async function and then console log the results with the help of Promise. I’m afraid I haven’t quite grasped the concept yet. I wanted to wait till getlinks finished performing tasks and then console log the result. But the it logs the result as empty even before the ge…
Where to place async/await in this case?
EDIT: The problem was not the placement of the async/await per se, but the fact that I was trying to make a constructor asynchronous. I have looked through docs, read other questions and answers, but I still can’t get my head wrapped around what function to make async, and where to place the await, to g…
How do I initialize a default “data” value to the returned value of a callback function?
I am running into an issue being able to initialize a value on App.vue to the result of a function when that function is async. I also tried setting it to the resolution of a promise but that didn’t seem to work either. In the former case I just get an undefined value, and in the second I just get
How does Promise Chaining work in memory?
Console Output: My main question is what is actually happening when the global execution context thread is finished and popped of the execution stack. How does JS/V8 know where this Promise Object is in memory if the Promise Object is not assigned to a variable within global execution context? How does it kno…
Questions on performance regarding async/await vs Promises and the event loop
Introduction A colleague of mine and I have been discussing the asynchronous nature of JavaScript in the browser and wondering what technical benefits are. We are aware that async/await is syntactical sugar for Promises, but curious to know if there is any other performance benefit for using one over the othe…
Not sure how to populate an array within a method that has Promises within it
I have a method that performs some basic mathematical calculations in my Ionic app after fetching data from SQLite DB. I want to show these results on a page but the problem is that I am not sure how to put all these calculated values in an object array. I tried following but the editor is complaining about n…
How can I retry function?
I’m developing a script for personal needs. I need to retry if an error returned, but I don’t know how to fix it. how to resolve it? But I get the following error: TypeError: You may only yield a function, promise, generator, array, or object, but the following object was passed: “[object Ob…