ecmascript-2017 Questions
3
Solved
I have a function chain in a node 4.3 script that looks something like, callback -> promise -> async/await -> async/await -> async/await
like so:
const topLevel = (resolve, reject) => {
const...
Yolanthe asked 28/11, 2016 at 16:37
5
Solved
The ECMAScript specification defines the Atomics object in the section 24.4.
Among all the global objects this is the more obscure for me since I didn't know about its existence until I didn't rea...
Promethium asked 24/8, 2017 at 21:6
2
Solved
Regarding compatibility between ECMAScript specification and actual implementation;
It is fairly easy to check out the data about browser support for ECMAScript2015 (ES6), but I found it pretty dif...
Stellate asked 16/5, 2020 at 11:23
4
Is it or will it be possible to have an ES6 class getter
return a value from an ES2017 await / async function.
class Foo {
async get bar() {
var result = await someAsyncOperation();
return res...
Statampere asked 23/11, 2015 at 19:47
2
I have been getting the following error constantly throughout this process
SyntaxError: /Users/user1/npmprojects/experiments/test-reactstrap0/src/components/index.js: Support for the experimental ...
Hallvard asked 28/3, 2019 at 15:37
2
Solved
ECMA-2017(ES8), just finalized about a month ago, introduces SharedArrayBuffer and Atomics. The link here shows that they have been supported in some browsers.
As we know, they are meant to allow ...
Ghost asked 21/7, 2017 at 6:17
3
Solved
I'm learning react-native, and I'm running into an issue. Why does getting data on return from an async function return a promise, but in the async function itself, it correctly returns an array of...
Rusticate asked 19/7, 2017 at 20:48
1
I'm using karma-typescript, with this karma config file :
karmaTypescriptConfig: {
compilerOptions: {
target: "es5",
lib: ["dom", "es2015", "es2017"]
},
bundlerOptions: {
transforms: [requir...
Doom asked 21/11, 2018 at 13:13
3
I'm using angular 4 and working on a string pipe to pad string with zeros.
But angular or vs-code drops errors that the prototype "padStart" does not exist.
How to setup this support to my proje...
Perloff asked 28/10, 2017 at 12:50
1
Solved
I was experimenting with how / is interpreted when around different keywords and operators, and found that the following syntax is perfectly legal:
// awaiting something that isn't a Promise i...
Procora asked 1/5, 2019 at 9:56
5
Solved
My function returns a promise that resolves as soon as the HTTP server starts. This is my code:
function start() {
return new Promise((resolve, reject) {
this.server = Http.createServer(app);
th...
Euripus asked 25/10, 2017 at 13:30
1
Solved
I am targeting ES2018 and do not care about ES3 or ES5. From my tsconfig.json: "target": "ES2018". tsc complains:
An async function or method in ES5/ES3 requires the 'Promise' constructor. Make
...
Pusillanimity asked 1/10, 2018 at 14:56
4
Solved
How can I change the following code so that both async operations are triggered and given an opportunity to run concurrently?
const value1 = await getValue1Async();
const value2 = await getValue2A...
Melodramatic asked 23/10, 2017 at 12:24
3
Solved
I have create a class in nodejs
class ApnService {
sendNotification(deviceType, deviceToken, msg, type, id) {
try {
const note = await apnProvider.send(note, deviceToken)
console.log(note)
}...
Ilarrold asked 15/11, 2018 at 6:18
3
I would like to add support to async/await to node repl
Following this issue: https://github.com/nodejs/node/issues/8382
I've tried to use this one https://github.com/paulserraino/babel-repl but ...
Grissom asked 5/1, 2017 at 12:22
2
I have a method which returns a value from an element in the array. Not all the elements have the property I want to return. I would like to do this function with one line using the method find(). ...
Wiredraw asked 18/9, 2018 at 15:14
3
Solved
I started to use ES7 feature async/await , which gives the best approach to deal with asynchronous tasks, and makes your code cleaner and readable.
However it doesn't give you an access to Promise...
Insensibility asked 9/11, 2016 at 1:21
1
Solved
Actually my main question was using Promise.prototype.catch() in async/await ES8 syntax, Undoubtedly Promise.prototype.then() is existed in essence of async/await syntax.
I searched about using Pr...
Oncoming asked 16/5, 2018 at 14:15
2
Solved
Is there a way to use the TypeScript compiler only to remove type annotations, but not transpiling async functions? Something like a { target: 'esInfinite' } option? The reason is: There are browse...
Audit asked 7/10, 2016 at 14:4
1
I am wrapping a function returning a promises into an async function on a small helper function...
trash(filesArray, {
glob: false
})
.then(() => {
resolve(true);
}).catch((err) => {...
Nanaam asked 15/4, 2018 at 13:1
4
Solved
Basically, function must be prefixed with async keyword if await used inside it. But if some function just returns Promise and doesn't awaiting for anything, should I mark the function as async?
S...
Bedwell asked 22/5, 2017 at 7:22
3
Solved
Sometimes code would like to know if a particular function (or children) are running or not. For instance, node.js has domains which works for async stuff as well (not sure if this includes async f...
Bosky asked 12/3, 2018 at 17:30
1
If I use async/await function in a nested function call, I think the callers of that async/await functions should have async/await prefix.
For example, in this situation:
function a() {
b();
}
f...
Sink asked 6/3, 2018 at 2:34
2
Solved
This proposal suggests that async functions can use generator functions under the hood, although I cannot find a confirmation of this in ES2017 spec.
Moreover, when generator prototype becomes mes...
Georgiegeorgina asked 24/10, 2017 at 10:50
3
Solved
I read about async/await, but I've a critical question.
At first I explain an old example to show base of my question and then I ask my exact question.
Everybody know it:
console.log('1');
consol...
Jollanta asked 5/2, 2018 at 7:16
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