React-State

Question 1

What are hooks in React?

Answer 1

Hooks are special functions that act as unconditional statements that your component needs

Question 2

What are the “Rules of Hooks”? (if necessary, re-read the “Pitfall” box in State)

Answer 2

Hooks can only be called at the top level of your component. Meaning that you cannot call Hooks inside conditions, loops, or other nested functions

Question 3

What is the purpose of state in React?

Answer 3

The purpose of state in React is to allow components to remember certain things about the component: the current input value, the current image, the shopping cart

Question 4

Why can’t we just maintain state in a local variable?

Answer 4

Local variables don’t persist between renders of a component. When a component renders a second time it does so from scratch and changes to local variables are not remembered.

Question 5

What two actions happen when you call a state setter function?

Answer 5

a state setter function updates a local variable and triggers react to render the component again

Question 6

When does the local state variable get updated with the new value?

Answer 6

After the setter function is called.