Category "ecmascript-6"

ES6 modules - imported constants undefined if not in React component

The only similar question I have found is this one but I can't see how would I have caused a circular dependancy in this case: I have a file exporting constants

Why ngOnChanges() does not trigger when @Input() update the data Angular 8?

parent.component.html <parent-comp [data]="mydata"> </parent-comp> parent.component.ts this.service.abc$ .takeUntil(this.ngUnsubscribe.asOb

Shallow-clone a Map or Set

How do you shallow-clone a Map or Set object in JavaScript? I want to get a new Map or Set that has the same keys and values.

How do you import a javascript package from a cdn/script tag in React?

I'd like to import this javascript package in React <script src="https://cdn.dwolla.com/1/dwolla.js"></script> However, there is no NPM package,

ExpressJs is return error `ERR_MODULE_NOT_FOUND` if I import the file without `js` extension

I build a expressJs app by ES6 and I got the below error: (node:4132) ExperimentalWarning: The ESM module loader is experimental. internal/modules/run_main.js:

How to scroll to an element?

I have a chat widget that pulls up an array of messages every time I scroll up. The problem I am facing now is the slider stays fixed at the top when messages l

How to omit specific properties from an object in JavaScript

Is there a clean way to return a new object that omits certain properties that the original object contains without having to use something like lodash?

Node v13 / Jest / ES6 — native support for modules without babel or esm

Is it possible to test ES6 Modules with Jest without esm or babel? Since node v13 supports es6 natively have tried: //package.json { … "type": "modu

babel-node is not recognized as an internal or external command, operable program or batch file

When I try to run a JS file by babel command it is showing: "babel-node is not recognized as an internal or external command, operable program or batch file

How can I select only a few fields when destructuring a JavaScript object? [duplicate]

I can't seem to remember how to write this destructuring pattern, could you please help me? Let's say I have an object like this: { id: 'po_

How to replace /n to linebreaks in react.js?

I am trying to replace every /n to a <br> tag in ReactJS. In my note.note object there is a string with multiple /n in it. example note.note: test\ntest

Use reselect selector with parameters

How do I pass additional parameters to combined selectors? I am trying to • Get data • Filter data • Add custom value to my data set / group d

Re-export default in ES 6 modules

In ES6, is it possible to shorten the following code. I have an App.js file and an index.js. index.js import App from './App'; export default App; Somethin

ES6 - Finding data in nested arrays

In ES6 using find or filter I'm quite comfortable iterating through to find an element in an array using a value. However, I'm trying to get a value from a par

Typescript: Cannot use import statement outside a module

I have a .ts file in node js (latest version of node.js for 07.10.19) app with importing node-module without default export. I use this construction: import { C

"Uncaught SyntaxError: Cannot use import statement outside a module" when importing ECMAScript 6

I'm using ArcGIS JSAPI 4.12 and wish to use Spatial Illusions to draw military symbols on a map. When I add milsymbol.js to the script, the console returns err

How to mock a ES6 singleton class with Jest?

I have a dependency that is a singleton class like so: // dependency.js class Dependency { foo() { ... } } export default new Dependency(); I'm trying to

Vue.js: How to specify props in single file component?

I'm defining a single file component I want to use props option on that component. But where can I add the code? <template> <div class="hello">

check if function is a generator

I played with generators in Nodejs v0.11.2 and I'm wondering how I can check that argument to my function is generator function. I found this way typeof f ===