What happens when setState() function is called?

Question

What does the setState() function run? Does it only run render()?

Answer 1

Just an update to this answer: https://stackoverflow.com/a/45273993/7310034 (since lifeCycle methods are now updated)

setState() will run functions in this order:

getDerivedStateFromProps()

shouldComponentUpdate()

render()

getSnapBeforeUpdate (if exists)

componentDidUpdate()

According to this: http://projects.wojtekmaj.pl/react-lifecycle-methods-diagram/