setstate find opject in state and update

1this.setState(prevState => {
2  let jasper = Object.assign({}, prevState.jasper);  // creating copy of state variable jasper
3  jasper.name = 'someothername';                     // update the name property, assign a new value                 
4  return { jasper };                                 // return new object jasper object
5})
6
7//2ND METHOD
8
9this.setState(prevState => ({
10    jasper: {                   // object that we want to update
11        ...prevState.jasper,    // keep all other key-value pairs
12        name: 'something'       // update the value of specific key
13    }
14}))

1this.setState(prevState => ({
2  food: {
3    ...prevState.food,           // copy all other key-value pairs of food object
4    pizza: {                     // specific object of food object
5      ...prevState.food.pizza,   // copy all pizza key-value pairs
6      extraCheese: true          // update value of specific key
7    }
8  }
9}))