Promise | Generic Promises For TypeScript | Reactive Programming library
kandi X-RAY | Promise Summary
kandi X-RAY | Promise Summary
Promises are used to structure asynchronous programs and to avoid callback hell. While they are not as full featured like Rx for example, they are attractive because their implementation is rather simple.
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Currently covering the most popular Java, JavaScript and Python libraries. See a Sample of Promise
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Trending Discussions on Promise
QUESTION
I have updated node
today and I'm getting this error:
ANSWER
Answered 2021-Oct-27 at 17:19Ran into the same issue with Node.js 17.0.0. To solve it, I downgraded to version 14.18.1, deleted node_modules
and reinstalled.
QUESTION
import axios from "axios";
import { useNavigate } from "react-router-dom";
export const api = axios.create({
baseURL: "http://127.0.0.1:8000/",
headers: {
"content-type": "application/json",
},
});
api.interceptors.response.use(
function (response) {
return response;
},
function (er) {
if (axios.isAxiosError(er)) {
if (er.response) {
if (er.response.status == 401) {
// Won't work
useNavigate()("/login");
}
}
}
return Promise.reject(er);
}
);
...ANSWER
Answered 2021-Nov-17 at 02:14The reason this is not working is because you can only consume hooks inside a React component or a custom hook.
Since this is neither, hence the useNavigate()
hook is failing.
My advice would be to wrap the entire logic inside a custom hook.
Pseudo code :
QUESTION
I'm creating a program to analyze security camera streams and got stuck on the very first line. At the moment my .js file has nothing but the import of node-fetch and it gives me an error message. What am I doing wrong?
Running Ubuntu 20.04.2 LTS in Windows Subsystem for Linux.
Node version:
...ANSWER
Answered 2022-Feb-25 at 00:00Use ESM syntax, also use one of these methods before running the file.
- specify
"type":"module"
inpackage.json
- Or use this flag
--input-type=module
when running the file - Or use
.mjs
file extension
QUESTION
I'm using the new syntax in Vue 3 and I really like the idea of it, but once I tried to use a top level await I started to run in some problems.
This is my code:
...ANSWER
Answered 2022-Mar-24 at 09:09Top-level await must be used in combination with Suspense (which is experimental).
You should be able to just do it in onBeforeMount
. Not as elegant; but a solid solution. Something like this:
QUESTION
I'm trying to create a simple test with nestjs, and I'm get this error
Test functions cannot both take a 'done' callback and return something. Either use a 'done' callback, or return a promise.
Returned value: Promise {}
The unit test is so simple, but I get an error when I use done();
...ANSWER
Answered 2022-Jan-27 at 21:11You are combining Async/Await and Done.
Either use asnyc/await, or done.
QUESTION
I'm attempting to create an apollo client
plugin for a Nuxt 3
application. It's currently throwing an error regarding a package called ts-invariant
:
ANSWER
Answered 2022-Jan-07 at 01:52Solved by including @apollo/client
and ts-invariant/process
into the nuxt build transpile like so:
QUESTION
I'm having trouble understanding how/why parentheses work where they otherwise should not work®.
...ANSWER
Answered 2022-Jan-09 at 16:14Note: When referring to documentation and source code, I provide links to an unofficial GitHub mirror of R's official Subversion repository. The links are bound to commit 97b6424 in the GitHub repo, which maps to revision 81461
in the Subversion repo (the latest at the time of this edit).
substitute
is a "special" whose arguments are not evaluated (doc).
QUESTION
I am trying to setup a very small GraphQL API using NestJS 8. I installed all required redepndencies from the documentation, but when I start the server, I get this error:
...ANSWER
Answered 2021-Nov-16 at 02:14I was receiving the same errors.
After debugging step by step, the answer is that @nestjs/graphql@9.1.1
is not compatible with GraphQL@16
.
Specifically, GraphQL@16
changed the gqaphql
function, as called from within graphqlImpl
, to only support args without a schema:
QUESTION
I have a simple chat app using Firebase v9, with these components from parent to child in this hierarchical order: ChatSection
, Chat
, ChatLine
, EditMessage
.
I have a custom hook named useChatService
holding the list of messages
in state, the hook is called in ChatSection
, the hook returns the messages
and I pass them from ChatSection
in a prop to Chat
, then I loop through messages
and create a ChatLine
component for every message.
I can click the Edit
button in front of each message, it shows the EditMessage
component so I can edit the text, then when I press "Enter", the function updateMessage
gets executed and updates the message in the db, but then every single ChatLine
gets rerendered again, which is a problem as the list gets bigger.
EDIT 2: I've completed the code to make a working example with Firebase v9 so you can visualize the rerenders I'm talking about after every (add, edit or delete) of a message. I'm using ReactDevTools Profiler to track rerenders.
- Here is the full updated code: CodeSandbox
- Also deployed on: Netlify
ChatSection.js
:
ANSWER
Answered 2021-Dec-13 at 23:35This is what I think, You are passing Messages
in ChatSection
and that means that when Messages
get updated ChatSection
will rerender and all its children will rerender too.
So here is my idea remove Messages
from ChatSection
and only add it in Chat
.
You already using useChatService
in Chat so adding Messages
there should be better.
Try this and gets back too us if it working.
If still not as you like it to be there is also other way we could fix it.
But you have to create a working example for us so we could have a look and make small changes.
QUESTION
After migrating my angular 6 project to 12. I am getting multiple warning in terminal
if in angular.json i set optimisation: false configuration then all issue get resolved but i don't want to make this changes it should be true only.
with optimisation: true i am getting all these warnings:-
Earlier same code was working fine without any warning.
...ANSWER
Answered 2021-Sep-08 at 10:30I had the same problem. You should change the import of 'assets/.../variables.scss' to './assets/.../variables.scss'. In my case it was in styles.scss but it can be in every .scss file.
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