ecmascript-next Questions
2
Solved
I am getting the below console warning for this regex pattern:
^[a-zA-Z0-9+_.-]+@[a-zA-Z0-9]+\\.[a-zA-Z0-9]+$
Pattern attribute value ^[a-zA-Z0-9+_.-]+@[a-zA-Z0-9]+\.[a-zA-Z0-9]+$ is valid with t...
Venerate asked 19/5, 2023 at 2:33
11
Solved
All four functions are called below in update return promises.
async function update() {
var urls = await getCdnUrls();
var metadata = await fetchMetaData(urls);
var content = await fetchContent...
Route asked 3/6, 2016 at 22:6
3
Solved
I want to write a function which returns me a component wrapped up in another. The function I'm trying to write is like below in JavaScript.
function GetGroup({ name, text, isRequired, ...props })...
Adlei asked 14/2, 2018 at 13:9
3
I have the following module class and to make it work similar to non module functional javascript, I have to call a function to bind all the class member functions to the correct this scope and I h...
Arenicolous asked 25/12, 2023 at 4:50
4
Solved
There are already a lot of cool features in ES6/ES7 for defining Javascript objects. However, the following pattern is common in Javascript:
const obj = {
requiredKey1: ...,
requiredKey2...
Larhondalari asked 19/12, 2017 at 17:18
14
Solved
Error: Missing class properties transform
Test.js:
export class Test extends Component {
constructor (props) {
super(props)
}
static contextTypes = {
router: React.PropTypes.object.isRequir...
Draff asked 19/2, 2016 at 23:55
3
Solved
In ES6, given the following example:
export default class MyStyle extends Stylesheet {
static Color = {
mainDark: '#000'
}
static Comp = {
...
color: Color.mainDark
}
}
How can I access C...
Gamma asked 11/12, 2015 at 9:28
3
Solved
Assume we have:
class FinalClass {
...
}
How to modify it to make
class WrongClass extends FinalClass {
...
}
or
new WrongClass(...)
to generate an exception? Perhaps the most obvious s...
Ingratiating asked 3/8, 2016 at 15:50
7
This Javascript function seems to use the while loop in an asynchronous way.
Is it the correct way to use while loops with asynchronous conditions?
var Boo;
var Foo = await getBar(i)
while(Foo...
Twain asked 23/8, 2016 at 21:13
11
I have to pass a function to another function, and execute it as a callback. The problem is that sometimes this function is async, like:
async function() {
// Some async actions
}
So I want to ...
Linkman asked 21/7, 2016 at 15:32
13
Solved
How one can write a function, which takes only few attributes in most-compact way in ES6?
I've came up with solution using destructuring + simplified object literal, but I don't like that list of ...
Arlina asked 28/8, 2014 at 16:42
1
Solved
When I run this code:
'use strict';
class Base {
constructor() {
this._public();
}
}
class Child extends Base {
constructor() {
super();
}
_public() {
this.#privateMethod();
}
#...
Saccharin asked 10/2, 2023 at 18:23
5
I'm new to nodejs. I’m not seeing the response in ex 1, but i see in ex 2. Why? Await works for me in other places, using babel.
Ex 1
let res = await request(url)
console.log(res);
console.log...
Devisal asked 18/7, 2016 at 3:4
11
Solved
Seem to be having some issues incorporating async/await with .reduce(), like so:
const data = await bodies.reduce(async(accum, current, index) => {
const methodName = methods[index]
const met...
Orjonikidze asked 20/12, 2016 at 13:26
5
Solved
Is there a cleaner way to do this (with anything that is at least an ES draft and has a babel plugin, i.e., ES6, ES7, etc.):
const { a, b } = result = doSomething();
Where I want to keep the ove...
Earthwork asked 31/12, 2017 at 1:59
3
Solved
ES6 has generators that return iterators:
function* range(n) {
for (let i = 0; i < n; ++i) {
yield i;
}
}
for (let x of range(10)) {
console.log(x);
}
There is a proposal for asynchronou...
Cordey asked 9/1, 2016 at 12:57
4
Solved
I recently learned about optional chaining in Javascript and have been making use of it in a React/NodeJS project. Works great.
I noticed I have been using it with arrays map, even without thinkin...
Multiangular asked 11/2, 2020 at 8:56
9
Solved
I have an array of values like:
const arr = [1,2,3];
Is there any way I can use destructuring to create the following output? If not, what is the easiest way I can do this in ES6 (or later)?
co...
Insolate asked 7/7, 2016 at 10:5
8
Solved
I was just reading this fantastic article «Generators» and it clearly highlights this function, which is a helper function for handling generator functions:
function async(makeGenerator){
return ...
Slime asked 24/3, 2016 at 9:14
2
Solved
I'm using class properties (static and normal) and decorators in JavaScript. Is there a way to either enable other ES stages for code highlighting or disable the specific error messages for them?
...
Kemper asked 19/4, 2016 at 10:57
5
Solved
I have a question about the proposed JavaScript do expression construct. There are many examples that show how it can be used to return a value from a conditional statement that has both if and els...
Pocketful asked 14/8, 2017 at 4:10
4
Considering that there is a project that should be converted from TypeScript to Babel, files contain typing information that cannot be just ignored by Babel.
How can TS type annotations and assert...
Noletta asked 19/8, 2016 at 18:35
6
Solved
I'm trying to use decorators in my JS project, however ESLint is throwing an error stating that the @ symbol is a unexpected character.
My code:
@observable items = [];
My .eslintrc:
{
"pars...
Salonika asked 18/11, 2016 at 13:21
2
Solved
When trying to use async/await in react-native, I am getting the following error:
uncaught error Error: SyntaxError: /Users/senthilsivanath/Documents/MusicTulip/index.ios.js: Unexpected token (50...
Uninhibited asked 10/4, 2016 at 8:19
4
Solved
I've come across the term ESNext, and wondering it is the same as the ECMAScript.
So, I have these questions here:
What is ESNext, actually?
Does it refer to any specific version of ECMAScript...
Wingfooted asked 10/6, 2019 at 5:58
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