React setState with spread operator when you need to change values of state object item. Motivation: https://stackoverflow.com/questions/43638938/updating-an-object-with-setstate-in-react

React - Set State with Spread Operator.ts

this.setState(prevState => ({
                      OBJECT_NAME: {
                        ...prevState.OBJECT_NAME,
                        OBJECT_KEY : NEW_VALUE
                      }}));