This course in school is almost done, so there's only one assignement after this. This assignement was to create a web app for renting a car. In the beginning of the video you can see examples of a few error alerts the app gives when trying to set the end date before start date or if the selected time period is less than 7 days.
After everything is ok, there's a modal which shows your info and asks to either accept or decline. If accepted, the app saves all the input data as jSON.
A lot of details in this one which means a lot of work!