Safari has support for ES6 Maps and Sets in version 7.1 and higher (MDN). I'm using a Map in my application and at some point want access to the values. Calling the values() function on the map see...

Recently I have come across about globalThis in Javascript. I am not sure how it is going to behave if it is called from a function. Every time it is returning the window object. if that is the cas...

just upgraded from ng8 to ng11. when I run ng serve it works fine, but when I run build for production I get the following error: Generating ES5 bundles for differential loading... An unhandled ex...

In ES6, we can do: const key = "foo" const myObj = { key } myObj // => { foo: "foo" } So, { key } is equivalent with { key: key }. But, how can we create the same object without having the k...

I have a ts module. I'm compiling this module to another project's specific folder by using outDir of tsconfig.json and the command tsc -w. So, whenever I update the ts module, it compiles files to...

I have a nodejs / typescript 2 project and use the es6-promise package. Now i would like to get rid of the extra package because i can target ES6 in typescript directly. So i removed the es6-pro...

I am using Rollup to bundle my code for production. I have multiple js files, so I am using the Rollup plugin-multi-entry plugin to use a glob pattern to target all of my js files. I am outputting ...

I used grunt-uglify in my project and I'm working with es6. for some es6 features, such as fat arrow function, it's throwing an error. I think the uglify don't understant that syntax. so do i have ...

I'm following a react tutorial but I'm lost. I don't understand starting line 9. so I tried to make a little miarature const updateTodo = (list, updated) => { const index = list.findIndex(...

I've faced the issue with the storybook library + ReactJS. I need to display a custom text under the brand image in the storybook. Is there any option in the storybook library to achieve it? Are we...

I'm writing some tests in selenium webdriver js. I start by typing: it('blah blah blah', async () => { await driver }) Then I type . after driver. Suggestions come up. Then I select findElem...

I would like to ask if how should I fix this issue because I am already stuck and confused about this part. I already installed rollup globally using this command npm install --global rollup Howev...

I am trying to use styled-jsx with some code. However, no matter what I do, I seem to get an error index.js:1437 Warning: Received `true` for a non-boolean attribute `jsx`. If you want to write i...

Is it possible to get the file name of the current JavaScript module? // item.mjs function printName() { console.log(...); // >> item or item.mjs }; If not, why not? Sandboxing, etc.

I'm using Sequelize together with Node and JavaScript in one app. As you know when you execute sequelize-init it creates config, migrations, models and seeders folder. Inside of the models folder, ...

Is there any harm in updating the message of an Error object like this? const err = new Error('bar'); ... err.message = `foo ${err.message}`; My objective is to add some useful information to th...

I am trying to toggle an aria tag between true and false when a button is clicked. I've tried several implementations which seem to do absolutely nothing. Below is what I am currently using which s...

I have an Express API server app and a React client app both implemented in TypeScript. I defined my data models using TypeScript interfaces, and I'm using those interfaces on both ends of the syst...

I have an existing ESLint configuration with "ecmaVersion" set to "5" that I want to modify to allow the use of let and const which are ES6 features. There are mostly* supported in Internet Explore...

The standard way to use a React useState Hook is the following: const [count, setCount] = useState(0); However this const count variable is clearly going to be reassigned to a different primitiv...

I am exporting the following ES6 class from one module: export class Thingy { hello() { console.log("A"); } world() { console.log("B"); } } And importing it from another module: import {...

I reduced the issue to this example: test.model.ts export class A { a: number; } export interface B { b: number; } test.component.ts import { Component, Input } from '@angular/core'; import...

export * form 'some-library' export * from './myOverrides' // error: [ts] Module 'some-module' has already // exported a member named 'someFunc'. // Consider explicitly re-exporting to resolve the ...

Is there an elegant way to tell Harmony's slim arrow functions apart from regular functions and built-in functions? The Harmony wiki states that: Arrow functions are like built-in functions in ...

type Foo = { [key: number]: string } const foo: Foo = { 100: 'foo', 200: 'bar' } const sizes: number[] = Object.keys(foo) Gives me: Type 'string[]' is not assignable to type 'number[] Why d...