Ecmascript-6 Questions

I'm creating a list of posts with the creators' name in react and

While selecting one option in the select box at that time rest of the options are become multiple values. how can i prevent this duplicate values

I have specific object that i need to get from another array which is the hexcode this is the data that i'm filtering

I am using react js boiler plate (create-react-app) and imported three.js. i am trying to use trackballcontrols for a particular project but it

I have a crud functionality in my react application using hooks and es6. i'm using antdesign list component as well. in my add function, after

In my react application i am passing parent's state to child as a prop like so: <child parentsstate={...this.state} />

This is how i import firebase into the project: import firebase from 'firebase/app' import firestore from 'firebase/firestore'

I am trying to manipulate an already initialised javascript class. the class is a http request library and i am trying to create a "base"

I have 1 input area and one popup area when i click to input, the popup will show, and when i click anywhere else in the body (except popup and

I need to run a website on a server. i installed node.js and created a server.js file in the project folder and read the index.html file there.

I am trying to delete all elements that matches @b.com, but it returns an empty array even if i remove the !, which

I'm pretty new to react and i was wondering how i could call a function inside a class (so like this.handlechange) and an arrow function with a

Im trying to build a reactjs app that has a map, i've wanted to use leaflet because of its popularity and the fact that its free

I am currently getting this error: actioncontroller::parametermissing in userscontroller#create param is missing or the value is

I'm trying to put together a little angular2 app: i'm not using typescript, but rather regular es6 with babel my files looks like

I'm trying to build a lerna package with a create-react-app package and a simple component library. my component is as follows:

I am trying to add a library function for sorting items in an array. though i got link and way, but when trying to make a library function, this

I have a case where i need to compare between two arrays and display values from another.; for example, i have two arrays: let a =

I have here a problem disabling the button when deleting. right now, it disables all the "delete" button of all images. i only wanted to

I am making 2 api calls to receive two sets of data. const callone = await api('get', `${baseurl}callone`); const calltwo = await

Fun with promises today ... i'm trying to figure out why i can't refer to this.promise to resolve it with another method, it's always

I'm writing a program where the user inputs a number into a react frontend and a node.js express backend gets all possible prime numbers under the

I have node.js project (express rest api) written in javascript. we decided to rewrite whole project to typescript. is possible to do it slowly,

Is there a better way to get the key names of the object with value equals to cat? import { topairs } from 'lodash'

I'm trying to construct a regular expression which i can use to replace all instances of "],[" with just "," in a string. i'm stuck on

I want to remove last item from array and rerender but i seem can't get it to work without using filter. but in my case i don't think filter is

Typescript is still giving me error object is possibly 'null'.ts(2531) even though i do this myref &&

I'm working on small app and sometimes my array producttypes has data, and sometimes it doesn't.. and i've noticed when

I'm receiving this json from my api, i'm trying to transform it into a usable format for my form ( it will be a list with checkbox)

I am trying to assign a new key to each object in the array with a unique id based on the index of the object in the array. when i click a

I have some code from the previous version of strapi that works, and the beta version of controllers is much different. there is multipart /

Basically i have a set of dynamic tables that are being displayed based on the values passed. if there is an empty array passed, it should show no

I have node.js script files which i am trying to re-use inside an asp.net application on ie 11. i follow below steps to use them on ie

I'm trying to load a bootstrap modal on page load unless a cancel button is pressed. the way the functionality is supposed to work is that once

I'm trying to fetch data from the firestore and display it to a bootstrap table with reactjs.i'm able to get the data and store it in a map, and i

I've ran into a little problem while refactoring my stuff... problem: i got a single class file with 1.1k lines and ~10

I am trying to convert to camel case words to a normal sentence text . for example :

Is there a more concise, prettier way to write this snippet of code? learning es6 syntactic sugar and was wondering if i can reduce the number of

I want to access to my reactjs project from other devices in the lan network. i already tried 0.0.0.0 for the host address, but i still can't

How do i omit the variable searchquery if its value is an empty string, and have this logic inside of template literal? code:

I have this array of keys: ["newid", "newfirstname", "newlastname"] and i have also array of objects that looks like

I'm searching a for a way to create a function. in which i can pass an object and an array of properties (keys) i want gone. that function will

I have one function, which returns promise: updatepassword(currentpassword: string,

I have initial state like: let initialstate = { items: [ { name: 'a' }, { name: 'b' }

I am trying to create multiple div tags based on the value passed on to the function. iso to do that in the function i create a

I am trying to import custom dependencies from lambda layer but is not working. environment: nodejs8.10 i have a layer which

I want to search only in name property of the list of json objects. this is the json array - combinedarr = [ {

To practice reactjs, i'm trying to develop a small application. i am unable to solve the key-error. what i'm trying to do:

I don't know why its giving length undefiined and other one is setdailydata is not a function const

I am trying to export data as csv file . i am using react-csv library for it everything is working fine but i am face to date format.

I am trying to compile a js class file with babel. the class has static attributes which i initialize on the same line. when compiling i get the

I'm working on small react app and my dropdowns looks like this: <custdropdown disabled={ isplayerloaded ||

I need a function to delete some entire object inside an array: let selecteditem = { linkid: 1 }; let sindecs = [ { estado:

I was trying to create an even number array of fibonacci series using functional programming - below code

I can share state via commonjs modules, but not via es6 modules. i'm wondering why, and want to know how to share state via es6

I am using a protractor and ecmascript 6 to develop end to end tests. but when the test is finished i see the error: message:

I have an array of cities with this structure (given from the cms): const cities = [ { city: 'genova',

I have an array of object as below. const data = [ {id: 1, name: 'peter',age: 21, gender: 'male'}, {id: 2, name:

Since es6, a new case has been added for rule 1 of

Ive create a class which needs to call to other class and get data e.g import { sc } from "./svc/service"; export

I'm new when using reactjs, i quite confused as why the image doesn't show up in my code. i'm using background: url() so it easier

I retrieve a huge array from the server (contains 2000+ objects). the structure of this array is like this: const arr = [ {code:

I am trying to achieve a dynamic form using react hooks and .map(); what i have achieved so far is to generate the form static like in

Hi came across this syntax in a node.js application, in which we are making a select query to our postgres database.

I am trying to map the object but in meantime it gives me the following error: typeerror: values.map is not a function.

I am trying to access child component value in parent so there i want to use it for update the state . actually in child component i have dropdown

I wrote a web page crawler that successfully crawls a web page and grabs the data of one job posting using puppeteer. i'm now trying

I'm new to async functions and even node.js. i'm trying to crawl a website and grab some data from it. when crawling the website my code randomly

When i create an observable and i am done with it i unsubscribe it directly const data$ =

I declared multiple variables in a for loop, and i would like to increment my variables in the post statement. i understand this is not the best

When reading react cookbook i've stumbled upon a code snippet, this function gets called when user checks a task as completed in a todo list:

I am facing some weird problem while import a const value in react. actually, i am exporting a const which is not related to react like

I am attempting to move my react-native app code to be in a more structured manner. originally, i had all of my firebase functions inside the file

What will be the default type of the variable in for..of loop.

I'm quite new with react stuff, what i am trying is to generate some dynamic stuff using .map() this is my component: import

I want to reuse my dropdown component in two other containers by passing two different set of array. example: one

I am implementing a setting page for an application. for each setting i have implemented a slider that has enabled(green) or disabled(red) state.

Edit: i know how to get it working using async/await but unfortunately, i can't use it as it's not widely supported (especially

I'm trying to add a button to a cell in a react bootstrap table with the following is my code: import react, { component }

I am using react-icons in my project and what this awesome package offer is to have all free fonts images in one place and served as react

I am a python developer learning javascript and node.js. i was practicing some javascript and one of the things i miss in python is the

How can i create my own "on" event handler in my class? for example, websocket has multiple "on" event handler as follows. var ws

I'd like to write a program that takes an array of strings and returns an object that groups those strings into arrays based on the number of

Here i am mapping financialtransactiondetail array and populating data. values are coming fine. now i have to get the sum of

I'm currently facing some difficulties mocking the 'os' module in nodejs. i'd like to mock the 'networkinterfaces' function of the module to

I have an href link displayed in react-table, which calls a spring backend application. sample code of the column header: '',

I have these javascript lines : const record = {}; const parts = ['deviceid-abc', 'messagesid-def']; record.deviceid = parts[0];

I am using a two-dimensional array in some code which i would like to replace with a more suitable data structure in context, namely a

So i was looking for some workaround for flat map as it doesn't work on ie and i find this one: but i don't really understand why does it work

I have this: function test1() { return new promise(resolve => { return resolve({ a: 1 }) }) }

Getting my hand dirty in sail.js (and node). versions $ sails --version 1.2.4 $ node --version v12.16.1

Any raison why i cant declare my default props like this ? am new in modern front-end and am come from js vanilla, sorry if seem hard to me

State looks like this for example { ownrecipe: {name:""} } now i need to change name property, this doesn't

With react native and react navigation, i can change my title with navigationoptions : const forumscreen = ({

Hello everyone i'm beginner in javascript i'm trying to convert from array of objects into array of array.i have tried some methods like

I have this code taken from a javascript post and i would like to use it in typescript but i get an error in: const contacts = ({contacts})

Trying to unit test reactjs application using mocha but getting error from es6 features (import/export) used inside node_modules

I have an array of objects and i have to add one property on each of the objects coming from and async function i am doing an array.reduce

I want to perform a $lookup in node.js similar to $lookup aggreation from mongodb. i have a solution but i'm not sure how fast it

How do i update the property of an object in redux and preserve the rest of the object.. const appreducer = (state = initialstate,