I’m starting to learn asynchronous Javascript and I’m really confused. To be honest, the async/await approach seems very logical to me. We need to let the runtime know we’re doing an asynchronous operation so it can handle it accordingly. But why don’t we need to do the same when using…
Tag: async-await
How to store the value of a variable in state immediately when set state is async
I am new to react and am trying to store the value in state for customer my code for getting the value of the dropdown is this: I am running function this.getCustomerName() in this function, The code for that is this: I am setting code= this.state.customer in the function getCustomerName which I am running ju…
Axios in a firebase function returning pending promise even inside two async/await blocks
I have an async/await problems (I know, I know) that makes no sense to me. I’m declaring both functions (child and HOF) as async, and awaiting the returned results before trying to console log them. Surprise surprise, I get pending. The function hangs for 60s and times out (so it seems even my runWith t…
How does variable setting work with await?
Can someone explain to me why this is not working the way I am expecting? I am expecting the last console.log to run after my functions run, but it is returning empty length string instead of the actual date. These are the variables I want to set after my function call. Declaring them now so the scope is set …
Then Vs Await issue
You dont have to read the code, what is happening is a file is being uploaded 1000 bytes at a time. And to ensure that we send the bytes in order we are using await. What if I wanted to use .then(), it seems hard as there is a loop around the fetch call. Answer Here is the same functionality
How to execute some statements after the execution of a function in javascript
I want the last three lines of code(from defining let variable to logging it out) to be executed after the execution of the callback function of onreadystatechange event. How can I achieve this? Answer from readyState === 4 your execution will continue that means you got the data now you can continue your log…
Catch block does not execute immediately after exception is thrown in try block
I have a bit of Javascript code, which is not behaving as I’d expect it to. Can someone tell me what is going on here? Here’s a simplified version: The parser() here is an async function, but it also calls some callbacks passed to it (I’m only showing one here, but there are multiple). It ca…
Using async await in Cypress
I’m very new in Cypress and I’m trying to take a value from an element to use after in the test, but I can’t manage to get the value. Someone said that I need to use async await, but it is not working or maybe I’m doing something wrong. Thanks in advance! Answer You can use aliases and…
I keep getting undefined after async call in another function
I Have 2 functions one which uses async and await to grab data and place it into an array. The second is acts like a checker to see if the user inputs a similar value as seen on the database When I compile a simple if statement everything returns true and when I do console.log(test[0]) it returns undefined? A…
Undefined from promise using .then() JavaScript
I am trying to get data from Firestore using multiple queries, but the returned data is always undefined, even though console.log(data) in .then() block shows the data exist. Answer You have to return the promise in your function getPeers(): EDIT: A little advice when handling errors in async functions, in yo…