react-forms

Question 1

What are controlled components?

Answer 1

An input form element whose value is controlled by React (making value=this.state.value–the state will always be in control)

Question 2

What two props must you pass to an input for it to be “controlled”?

Answer 2

value, onChange

Question 3

What Array method is commonly used to create a list of React elements?

Answer 3

.map

Question 4

What is the best value to use as a “key” prop when rendering lists?

Answer 4

key is to use a string that uniquely identifies a list item among its siblings. Most often you would use IDs from your data as keys: