Overview of vue-resource
We're going to be adding a third-party library to our project now called Vue Resource. This is a client used to make HTTP requests and is very useful for doing AJAX in your Vue app.
If you've done work with AJAX before, you might be wondering why we don't use Axios, which is a more popular library.
We definitely could, but in a simple project like this, I like Vue Resource because it integrates with Vue very nicely as you'll see.