Learn the simple yet most effective techniques to refactor code for better understandability, which makes it a breeze to maintain and understand. Examine both sides of the age-old developer debate about whether code should be commented or not. Learn the multiple ways to write comments in JavaScript, TypeScript, and React. Learn how to write comments in CSS to notate your styles. Learn the different ways to write comments in HTML , where you can and cannot put them, and how it can help you write code.