Questions tagged [thenable]
6 questions
11
votes
3 answers
PromiseKit 6.13.1 cannot conform to 'Thenable' when I try to use Promise functions
I am finding extremely hard to use PromiseKit 6.13.1 in an apparently simple situation.
I have the following two functions returning a Promise but I cannot seem to find a way to use them with ```firstly{}.then{} syntax:
func…
Fabrizio Prosperi
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5
votes
3 answers
In JavaScript ES6, how can a thenable accept resolve and reject?
I think one principle I take so far is:
A promise is a thenable object, and so it takes the message then, or in other words, some code can invoke the then method on this object, which is part of the interface, with a fulfillment handler, which is…
nonopolarity
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3
votes
1 answer
error message Uncaught (in promise) , but I can't find what's wrong with that after add catch function
Why does added catch still not work at all?
function maxRequest(url = ``, times = 3) {
// closure
function autoRetry (url, times) {
console.log('times = ', times);
times--;
return new Promise((resolve, reject) => {
…
xgqfrms
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1
vote
1 answer
Await Execution of a Subcommand and Parse its Output
I'm attempting to run a command line tool and parse the output from stdout in order to do something useful with it in a VSCode extension. I'm attempting to create Flow objects (defined elsewhere in the code) and append them to this.flows; however,…
Brand0R
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0
votes
2 answers
How does this promise without an argument work in this mutation observer?
I was looking at this mutation obersver in some typescript code and I can’t figure how the promise works in it, I’ve not see a promise without an argument in this style before:
const observer = new MutationObserver((mutations: MutationRecord[]) =>…
CafeHey
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0
votes
1 answer
Is it true that the JavaScript ES6 promise has a standard procedure for then() to chain several time-consuming promises with asynchronous tasks?
I think the short version of the question is: if the fulfillment handler supplied to a .then() returns a new promise, how does this new promise "unwrap" to the promise returned by .then()? (unwrap seems like a terminology used in the promise…
nonopolarity
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