JavaScript, node.js versions with nvm

TLDR: use nvm to manage node.js versions; develop and deploy with the same version. $ nvm ls-remote|tail to see the latest versions $ nvm ls-remote|grep LTS to see the “long term support” versions $ nvm install lts/erbium to install “erbium” (the latest release of version 12) $ nvm install 14 to install the latest version…

Save time: npm install nodemon

Nodemon will allow you to start your node.js project and make changes without manually shutting down and restarting your server. Many people are scared of installing nodemon globally, so here’s a guide to install nodemon locally in your node.js project. Step 1: Install nodemon  $ npm install nodemon –save-dev Step 2: Update your npm scripts…

How to publish an npm module

Step 0: You need some code to share. Create a new Github repo or choose one you currently want to publish Here is the command line argument to create a repo called “adder” $ curl -u <your_username> https://api.github.com/user/repos -d “{\”name\”: \”adder\”}” Once you have chosen a Github repo clone it Step 1: Create a proper…

curl express hello world

The official express.js hello world example may crash on certain deployments that rely on a certain PORT. Make sure you use the PORT set on process.env if it is set. const PORT = process.env.PORT || 3000 Complete example (code): const express = require(‘express’) const app = express() const PORT = process.env.PORT || 3000 app.get(‘/’, (req, res) =>…

How to detect if a user is online

How to detect if a user is online

Many browsers have implemented events “online” and “offline”; in addition to this, browsers also expose the navigator.onLine property that will return “online” or “offline” How many browsers is many? caniuse says every major browser (Chrome, Firefox, Safair, IE11…) except Opera mini has this functionality (as of July 4th 2018). How can I check the online status? > navigator.onLine…