Assuming I have a function(){ .... return Promise.all([p1,p2]) } And I want to instead return a promise of p1, p2, p3, with p3 starting only after p1 and p2 are done. What would be the best way? Would the following…
async function foo() { try { const response = await fetch("https://www.xxx.xxx"); const data = await response.json(); console.log(data); } catch (e) { console.log("Error!!: ", e); } } foo(); console.log('111'); Assuming that there is a code like this, the execution result is…
I am tying out node.js, but not able to wrap my head around why one works and other doesn't can you explain to me why this works: app.delete('/notes/:id', (req, res) => { const id = req.params.id; const details = {…
The JavaScript async function(or regular function that returns Promise) regards any object that has function with "then" field as a Promise. So is it impossible to let such object as a resolved value of Promise? Example: The function call await…
Let's say we have some Promise for we knew it resolves at some point. Now I have sync code (ag. no await possible) called repeatedly (eg. onAnimationFrame). How to use the result of the promise there, if it is fullfilled?…
I had tried to increment the variable loopVal inside the promise but I am unable to increment it. How can I do that? const hi = function(delay) { let loopVal = 1; return new Promise((resolve, reject) => { setTimeout(() =>…
So I have a bunch of promises I'm trying to batch complete like so: let promises = []; let fixedValues = []; let shouldIQuit = false; let value = { b: 1 }; promises.push( new Promise(async (resolve, reject) => {…
The api response consisting of properties such as films and vehicles array of urls and by fetching those, I'm trying to get the resultant objects and trying to update it back inside those mentioned properties. After returning the promises using…
I recently encountered this question on Stack Overflow, asking about how the then method really works in JavaScript. The responder, Trincot, made the following comment: The host will check which job queues have entries, giving precedence to job queues with…
Let's suppose I have 5 promises (A,B,C,D,E) that I want to fire in parallel. Then I need to wait for any of (A,B) AND any of (C,D) AND E before executing a code. My actual approach was something like: let…