michael-h.dk

From MDN web docs:

Every modern web browser includes a powerful suite of developer tools. These tools do a range of things, from inspecting currently-loaded HTML, CSS and JavaScript to showing which assets the page has requested and how long they took to load.

In most browsers you can get to the developer tools by Press-and-hold/right-click an item on a webpage (Ctrl-click on the Mac), and choose Inspect Element from the context menu that appears. (An added bonus: this method straight-away highlights the code of the element you right-clicked.)

To see the result of this challenge, open the dev tolls in your browser and choose the Consol tab to check the Javascript part of the page.