I want to analyse anwser from http request, display error if needed then return data. This is what I'm doing right now: fetch(URL,{method:"GET"}) .then(async response => { await read_errors(response) }) // .then(response => { read_errors(response) }) (Both had been tried)…
I have been exploring Promises for a while in JavaScript and thought of getting better at it. I made a small blog app in Node. The scenario is whenever a user is deleted I want to delete all the blogs…
I'm looking at a functionality similar to p-props, p-all npm library but which recursively resolves promises const values = { a: () => Promise.resolve(1), b: [() => Promise.resolve(2)], c: { d: () => Promise.resolve(3), }, }; console.log(await resolve(values, { concurrency:…
So, I was recently introduced to the concept of promises and I was told for chaining purpose, we use 'then', which is actually invoked when the attached promise object is fulfilled. And, to do some work after this object is…
Take a look at this code: async function fun() { return 5; } console.log(fun()); Here I have tried to return a promise that resolves with value 5, and tried to log the returned object. I was expecting the output to…
I am trying to figure out this for a long time now. I am trying to learn about how promises work and found this code in the article How do Promises Work? by Quil. I can see how sidePromise's dependencies…
I have some questions about async and promise. (sorry guys I'm newbie at programming) Can javascript only run functions asynchronously with functions/webAPIs like XMLHttpRequest, DOM, setTimeout, etc? can we make our own function that runs asynchronously? If we make a…
I'm quite bad with JS promises and async and I face a problem about it. First things first the simplified code: self.addEventListener('push', (event) => { const data = event.data ? event.data.json() : {} if (isClientFocused()) { console.log('Don't need to show…
There is a problem with following code. async function loadVideo (src, crossOrigin) { let video = makeVideo (src, crossOrigin); return new Promise((resolve, reject) => { Promise.allSettled ([ new Promise ( (resolve, reject) => {video.addEventListener('playing', () => {resolve(1);}, true )} ),…
Disclaimer: I am trying to learn, so question may be (an probably is) trivial; any comment on better ways to do the same are welcome, but I need to understand underlying concepts. I am more of a python programmer, so…