setstate in react when a component is in viewportview code example

Example 1: setstate react js

constructor(props) {
        super(props);
        this.state = {
            isActive: true,
        };
    }

    checkStatus = () => {
        this.setState({		// use this function
            'isActive' : !this.state.isActive,
        });
    }

Example 2: reactjs update state example

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