What are the possible ways of updating objects in state?

1. Calling setState() with an object to merge with state:

   • Using Object.assign() to create a copy of the object:

     const user = Object.assign({}, this.state.user, { age: 42 });
     this.setState({ user });

   • Using spread operator:

     const user = { ...this.state.user, age: 42 };
     this.setState({ user });

2. Calling setState() with a function:

   this.setState((prevState) => ({
     user: {
       ...prevState.user,
       age: 42,
     },
   }));