change value of an object react code example

Example 1: setstate find opject in state and update

this.setState(prevState => ({
  food: {
    ...prevState.food,           // copy all other key-value pairs of food object
    pizza: {                     // specific object of food object
      ...prevState.food.pizza,   // copy all pizza key-value pairs
      extraCheese: true          // update value of specific key
    }
  }
}))

Example 2: can we add new state property using setstate in react

How to become a pro with React setState() in 10 minuteswww.freecodecamp.org › news › get-pro-with-react-set...