react supdate stateobjects 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: reactjs update state example

{
  hasBeenClicked: false,
  currentTheme: 'blue',
}