Using state to control the active view
In this section, we’ll start building a new App component, in the usual way. First, we’ll display an AppointmentsDayViewLoader component. Because this child component makes a network request when mounted, we’ll mock it out. Then, we’ll add a button inside a menu element, at the top of the page. When this button is clicked, we switch out the AppointmentsDayViewLoader component for a CustomerForm component.
We will introduce a state variable named view that defines which component is currently displayed. Initially, it will be set to dayView. When the button is clicked, it will change to addCustomer.
The JSX constructs will initially use a ternary to switch between these two views. Later, we’ll add a third value called addAppointment. When we do that, we’ll “upgrade” our ternary expression to a switch statement.
To get started, follow these steps:
- Create a new file,
test/App...
