The problem I am facing is that somewhere in the code I am working with there is an error that I cannot catch. The simplest example of this would be the code below: try { new Promise((res, rej) => rej(new…
This code, below, executes as a result: script start promise1 promise2 script end promise3 race: A Chrome version 131.0.6778.26, and node environment 22.4 both give the same result Why is it that “‘race’: A” is executed after the execution of…
I haven't touched JS for a while. Can someone explain why am I getting such an unexpected result? My goal is to return a result from an async function. (Or, in other words, to convert an asynchronous function into a…
Would async bar() wait for sync foo() to finish before awaiting the new promise/timeout and calling bar() again? function foo() { console.log('is bar waiting for me to finish?'); } async function bar() { foo(); // is this blocking? await new…
I'm trying to understand how promises work under the hood in JS and faced with this example: const promise = Promise.reject(); promise .catch(() => console.log(1)); promise .catch(() => console.log(2)); // Output: // 1 // 2 const promise = Promise.reject(); promise…
I'm new to javascript and I have a question about promise chaining. I have two promises and want to return a promise that executes P2 after P1 regardless of whether P1 succeeded or failed, and return a Promise<number> as per…
I know there are plenty of resources explaining for await...of, but I don't think I'll ever fully grasp the concept until I see an example that works the exact same way but with more basic syntax. Thing is, if my…
(See also this answer.) When I redefine the Promise class (with a "monkey-patch" as shown below), this does not affect promises that are returned by a native function like fetch: Promise = class extends Promise { constructor(executor) { console.log("Promise created");…
I have several functions that call each other asyncronously, and I need to catch a situation when last functionis called. await statement supposes to call a function I should wait, but it is not to be called directly function First(){…
How can I effectively manage multiple asynchronous data fetch requests in JavaScript using the Fetch API? I want to create an array of fetch requests, each returning a promise, and ensure that all results are processed before proceeding. What’s the…