React: can you use setState with existing state object?

Question

Lets say I have a React component that has a \"state\" with 10 fields:

this.state = {
    field1: 1,
    field2: 2,
    ... other fields
    something: \'a\'
};
         


        

Answer 1

To update single field you need to pass object with this field. React will merge it for you.

this.setState({something: 'b'})