Start script missing error when running npm start

It looks like you might not have defined a start script in your package.json file or your project does not contain a server.js file. If there is a server.js file in the root of your package, then npm will default the start command to node server.js. You could either change the name of your application script to server.js or add the following to … Read more

How to solve npm error “npm ERR! code ELIFECYCLE”

Step 1: $ npm cache clean –force Step 2: Delete node_modules by $ rm -rf node_modules (rmdir /S /Q node_modules in windows) folder or delete it manually by going into the directory and right-click > delete / move to trash. If are not updating your packages you can delete the package-lock.json file too. Step 3: npm install To start again, $ npm start This worked for me. … Read more

How to fix ‘Unchecked runtime.lastError: Could not establish connection. Receiving end does not exist.’

I have the following error in the Chrome Dev Tools console on every page-load of my Node/Express/React application: Unchecked runtime.lastError: Could not establish connection. Receiving end does not exist This error makes a reference to localhost/:1. When I hover over this, it shows http://localhost:3000/, the address I’m viewing the app at in the browser. Anyone … Read more

How to fix ‘Unchecked runtime.lastError: Could not establish connection. Receiving end does not exist.’

I have the following error in the Chrome Dev Tools console on every page-load of my Node/Express/React application: Unchecked runtime.lastError: Could not establish connection. Receiving end does not exist This error makes a reference to localhost/:1. When I hover over this, it shows http://localhost:3000/, the address I’m viewing the app at in the browser. Anyone … Read more

How do I update Node.js?

Use Node Version Manager (NVM) It’s a Bash script that lets you download and manage different versions of node. Full source code is here. There is a separate project for nvm for Windows: github.com/coreybutler/nvm-windows Below are the full steps to use NVM for multiple version of node on windows download nvm-setup.zip extract and install it. … Read more

map function for objects (instead of arrays)

There is no native map to the Object object, but how about this:  Run code snippet But you could easily iterate over an object using for … in:  Run code snippet Update A lot of people are mentioning that the previous methods do not return a new object, but rather operate on the object itself. For that matter I wanted … Read more