I’ve been in web development for a long time and not until four or five years ago did I had to keep up with this light speed moving train.
Recently I created a small library with Angular which I wanted to publish to
npm (the node package manager). However, when I had everything in place from a build perspective using Travis CI in my GitHub repo, it was failing to publish the package with a
401 login error.
When writing a custom pipe in Angular you can specify whether you define a pure or an impure pipe: