In some online forms, you might need users to enter a phone number. Wouldn't it be great if your Angular application formatted that phone number on the fly?
Got an e-commerce site powered by Spring Boot? Need to accept payments via credit card? If so, then you'll be happy to learn that the Stripe API makes it easy to collect cash online!
Got a TinyMCE WYSIWYG editor in your Spring Boot web app? Wanna enable users to upload images directly into their content? Fortunately, that's pretty easy.