class keyword. It is basically a new syntax that does the exact same thing as the object constructors and prototypes we learned about in the constructor lesson.
There is a bit of controversy about using the class syntax, however. Opponents argue that
class is basically just syntactic sugar over the existing prototype-based constructors and that it’s dangerous and/or misleading to obscure what’s really going on with these objects. Despite the controversy, classes are beginning to crop up in real code bases that you are almost certainly going to encounter such as frameworks like React.
Since we’ve already gone fairly in-depth with Constructors, you don’t have too much left to learn here beyond the new syntax. If you choose to use classes in your code (that’s fine!) you can use them much the same way as object constructors.
After this lesson and completing the assignments, you will be able to:
classsyntax confidently. “Getters and Setters” are a useful feature!
extendthe core React component which gives you access to all their built-in functionality.
Go back to your “Library” example and refactor it to use
class instead of plain constructors. Don’t forget to use the git workflow you learned in this foundations lesson to work on a new feature. You should get used to working like this!
This section contains helpful links to other content. It isn’t required, so consider it supplemental.
This section contains questions for you to check your understanding of this lesson. If you’re having trouble answering the questions below on your own, review the material above to find the answer.