Developer Tools
scrape URLs from MDN site
https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Elements#interactive_elements
Console hacks
getAttribute vs .href
$ and $$
copy()
.filter()
trim()
.textContent
.map, .flatMap
.innerHTML
console.log
JSON.stringify
addEventListener (and function() thingy)
store as global variable
how to run the console in a child frame