3 simple tips for handling environment variables in JavaScript
So you have a SPA application and you are proud of it. And suddenly a random developer comes and say: "In a test environment, we need a bit different URL/…
Generate a time-based one-time password (TOTP) in Postman
I have a service with a one-time password, which I'm testing using the Postman app. Everything is fine except I have to use Google Authenticator/Microsoft Authenticator/Auth before every…
Using letter Pi(π) in JavaScript
Today I was doing some math in JavaScript. I needed a simple calculation from degrees to radians. Of course, I didn't remember the formula. I copied it from Rapid Tables…
Discover what is inside webpack bundle
You start a new project using magic tools like yo, a built-in CLI (e.g. aurelia-cli, angular-cli, react-cli, vue-cli, omg-new-framework-cli) or just a template from GitHub. Most of them have…
NPM versus Yarn - the epic fight for speed in Continuous Integration
A few days ago, a new tool came from the Facebook team: Yarn package manager. The results published on the official Yarn web page are fantastic. I'm using local NPM…
Why HTML form with AJAX submit gives 404?
Imagine you have a simple login HTML form on your /Login page. It looks like below: <form id="loginForm" method="POST"> <input id="textinput" type="text" placeholder=…