PS: Please remember that we have both a #javascript-help channel and a #html-css-help channel in our Discord community and also our community forum. If you have a very specific issue you’re struggling with, you should consider posting it there.
Firebase
Remember when we used the Firebase function push() to push a string to the realtime database? You can actually also push objects to the database. You can delete any part of the realtime database by referencing exactly that part. It might be the whole database, or a specific bookmark. All you need is the entire path.