Running tests by hand is no good: it gets tiresome and boring and that leads, after a while, to not running the tests any longer. Let's do better and write some automatic tests with Jasmine. Following the instructions over at https://jasmine.github.io/pages/getting_started.html, I set up a standalone runner; the required HTML code, using Jasmine Spec Runner 2.6.1, is as follows:
<!DOCTYPE html><html><head> <meta charset="utf-8"> <title>Jasmine Spec Runner v2.6.1</title> <link rel="shortcut icon" type="image/png" href="lib/jasmine-2.6.1/jasmine_favicon.png"> <link rel="stylesheet" href="lib/jasmine-2.6.1/jasmine.css"> <script src="lib/jasmine-2.6.1/jasmine.js"></script> <script src="lib/jasmine-2.6.1/jasmine-html.js" ...