What is the difference between JavaScript promises and async await?

I have been using ECMAScript 6 and ECMAScript 7 features already (thanks to Babel) in my applications - both mobile and web. The first step obviously was to ECMAScript 6 levels. I learnt many...

How use Express as an API web server with custom document renderer as middleware?

I have a code generator that I created, and I would like to have the ability to run it on the server. The generator uses pure native ECMA6 javascript to render HTML markup, but is transpiled to...

npm install multiple package names

What does it do when I run this command: npm install --save-dev package1 package2 It is definitely not installing multiple packages, but it looks to be essential. (For example...

Webpack React build doesn't work on production

My React application works perfectly fine on dev environment where it runs on webpack-dev-server but it doesn't work on production (on Apache). It fails without any error on console or anywhere....

Error regeneratorRuntime is not defined with Babel 7

I would like update my Babel config to version 7 in Electron project. I've add my all plugins i needed : "devDependencies": { "@babel/cli": "^7.0.0-beta.40", "@babel/core":...

How can I use a event emitter as an async generator

I'm trying to use the neat syntax of async generator with babel (I'm stuck with node 8) and I'm wondering how you would convert an event emitter to an async generator cleanly What I got so far...

JavaScript - babel-preset-env not transpiling arrow functions for IE11

I'm having a hard time trying to configure Babel to transpile code that IE11 can understand, specifically arrow functions. Running npx webpack --mode=development with my configuration doesn't...

react-native - FATAL ERROR: Ineffective mark-compacts near heap limit Allocation failed - JavaScript heap out of memory

I am struggling with the React Native and aws-sdk. The reason I use aws-sdk instead of aws-amplify is because: aws-amplify does not support Using a pre-signed URL to upload a file My project is...

Webpack not able to import React component with `<svg`> tag

I have a standard React funtional component which exports a SVG as so; SomeSVG.js import React from 'react'; const SomeSVG = props => ( <svg width={24} height={24}...

Error no Jest: This usually means that you are trying to import a file which Jest cannot parse, e.g. it's not plain JavaScript

I'm trying to run Jest with React, I started the project with --create-react-app, then added --babel and after --jest, but when I run [yarn jest], this error is displayed on screen, can anyone...

A 'yield' expression is only allowed in a generator body

I'm using redux-saga to fetch server api data. My question is that I'm trying to design following code. However yield put(get01Action(members)); which is commented out has following Syntax...

npm install issues TypeError: Cannot read property 'match' of undefined

I'm having massive issues installing the packages via npm. I'm getting nothing but this log as an output and have no idea where or how to fix this issue. 0 info it worked if it ends with ok 1...

Babel + Webpack sending arrow functions to ie11

I am trying to fix NextJS app for to work in IE11. I use webpack and babel. In Chrome and other modern browsers app is working fine, but on IE11 a get an error point to js arrow function. I am...

How to use a module 'fs' in Cypress?

I want to import JSON data from my local repository. var fs = require('fs'); var data = fs.readFileSync('./profile.json', 'utf8'); console.log(data); ... However Cypress occurs this error: Here...

Unable to set property 'wrap' of undefined or null reference

I'm building a bundle with webpack + babel for browser, targeting it to ES5. When I try to use it, an error Unable to set property 'wrap' of undefined or null reference appears. It worked normally...

How to implement SASS into react with raw webpack?

So I was trying to use Bulma and got a can't import _varibales.sass, which I have in my src folder. So I thought it was because I didn't configure webpack to support Sass. So I followed the...

Trouble installing turbodbc

I am attempting to install turbodbc on my Ubuntu 20.10 machine. My specs are as follows: pip 20.2.4, Python 3.8.5 , gcc (Ubuntu 10.2.0-13ubuntu1) 10.2.0 I have attempted the solutions provided in...

How do I use an entire cacheGroup as an entrypoint in webpack?

My webpack.config has entrypoints defined like this config.entry = { 'assessment-tile-view': { import: './assessment-tile-view/index.js', dependOn: 'vendors' }, 'assessment-tile-config': {...

Failed to Compile using OpenAPI TS Module with React - "You may need an additional loader to handle the result of these loaders"

I have a create-react-app application in web which I want to locally import a module that is outside of src. However, there seems to be some issue with loaders and Webpack. I have no idea why this...

Configuring babel-typescript for Sequelize ORM causes undefined properties

There is a problem when using sequelize-typescript together with babel-preset-typescript. Columns should be retrieved through the Object.defineProperty() but when an existing property already...

This version of ChromeDriver only supports Chrome version 87 Current browser version is 90.0.4430.93

ChromeDriver is giving an error about its version being too low: This version of ChromeDriver only supports Chrome version 87 Current browser version is 90.0.4430.93. I've updated pip's packages...

Sudden Tensorflow / Keras Google Colab dependency problems `AttributeError: module 'tensorflow._api.v1.compat.v2' has no attribute '__internal__'`

I have running a machine learning model (Matterport's Mask R-CNN) in google colab for a couple of weeks. All of a sudden today I am unable to run any of my notebooks due to I think some kind of...

Why do I get a Parsing error: Unexpected token => when creating firebase cloud function?

I'm fairly new to firebase cloud functions and I'm trying to create a cloud function that will send an send an email to a newly created user on firebase (i will be using a log to test it first)...

How do I remove unwanted paths in requirements.txt?

I currently have a requirements file generated with pip3 as follows: pip3 freeze > requirements.txt With the above command I get the following requirements.txt file: alabaster @...

I can't create a Vue project with (vue-router, vuex, node-sass, babel, pwa, eslint) through vue-cli

I'm using the following Windows 10 @vue/cli - 3.12.1 node - 16.2.0 a selected the features in the question vue-router, vuex, node-sass, babel, pwa, eslint when trying to run the command: vue...

CommonJS rollup plugin syntax error when importing 3rd party libraries, mostly related to 'process'

I've been working on a custom rollup config which takes a React project, and inlines the js and css in index.html. When I've imported some third party react libraries (like material-ui-color) I...

Unable to resolve own module - Expo

I have created my own expo project with pure javascript (not typescript). I generated a javascript Api Client using OpenApi Generator. To integrate the api with my code I need to link that package...

React 17 and webpack 5 not working in IE11

I have looked into everything I could about the migration to react 17 and webpack 5. This for an application that is also running on IE11. And after all the changes (as you will see in the code) ,...

How to properly setup bootstrap-vue in my Nuxt app?

I am very new to Nuxt.js application and I am trying to create a web application using the Nuxt.js and Vue.js. During the creation of the project using the Nuxt cli I have added the...

Vuejs Webpack Compression Plugin not compressing

I need help debugging Webpack's Compression Plugin. SUMMARY OF PROBLEM Goal is to enable asset compression and reduce my app's bundle size. Using the Brotli algorithm as the default, and gzip as...