I am learning promise chaining and I stumbled upon a doubt. Consider the below promise chain - const myPromise = new Promise((resolve, reject) => { setTimeout(() => { resolve("foo"); }, 10000); }); myPromise .then(handleFulfilledA, handleRejectedA) // first then .then(handleFulfilledB, handleRejectedB)…
Consider this: const a = () => { return new Promise((resolve) => { resolve(1); }); }; const b = () => { return new Promise((resolve) => { a() .then((aR) => { console.log(aR); resolve(2); }) .finally(() => { console.log("A"); }); });…
I have tried to implement promise chaining in Javascript with 3 simple promises. First promise I am resolving and last 2 I am rejecting. Till 2nd rejection it is working fine. But after the catch statement it is throwing error…
Consider the following assignments: const promise1 = (async () => { await someAsyncFunction(); })(); const promise2 = new Promise(async resolve => { await someAsyncFunction(); resolve(); }); Is there any meaningful difference between these two Promises (other than verbosity)?
I found a couple of questions pretty close to what I am looking for, but either I don't understand enough or the questions/answers do not exactly apply to what I am looking for: How to use requestAnimationFrame with Promise requestAnimationFrame…
Since TypeScript is a superset of Javascript and 'Type' would be removed in the resulting js files, so I guess playing with 'type' would not work like this, right? Also, is there any better way to do it other than…
the 2 promises are: loading the next image Load_Img_p. a waiting animation before moving to the next image Timing_Anim_p. It also has a visual animation encouraging you to wait while waiting for the next image to fully load Hourglass_f. the…
I am exploring async nature of js, and wish to write parallel execution for for each loop iteration. But Promise.all() execute sequentially right?, readed at a website. But I tried below implementation. Is it the correct way to achieve the…
I have the following class that I'm using to route all my API requests through class PromiseBroker { #promises = {}; #overlayEle = document.getElementById('loading-overlay'); constructor(){ } get promises(){ return this.#promises; } setPromise(key, value){ this.promises[key] = value; this.#overlayEle.classList.remove('d-none'); Promise.allSettled(Object.values(this.promises)).then(results => {…
I have such a piece of code async function loop() { for (let i = 0; i < 3; i++) { console.log(i,new Error("").stack); await 1; } } loop(); when I run it in Node (Chrome engine) I get this: 0…