To find out more about the topics covered in this chapter:
- The Flask API documentation (http://flask.pocoo.org/docs/1.0/api/) is highly recommended, both to help understand the Flask functions we've used, and to see other ways this flexible web server library can be used.
- For a more guided look at the Flask web server, I suggest reading Flask By Example, by Gareth Dwyer, showing you how to build more involved web applications using Flask.
- CSS selectors are used throughout HTML, CSS, and JavaScript applications. A good combination of reference and tutorial can be found at the W3C Schools CSS Selectors (https://www.w3schools.com/cssref/css_selectors.asp) website. I would recommend exploring the site for its information on most web application technologies. For CSS units, see W3C Schools CSS Units (https://www.w3schools.com/cssref/css_units.asp) to practice...
