React may batch multiple setState() calls into a single update for performance. Because props and state may be updated asynchronously, you should not rely on their values for calculating the next state. code example

Example: setstate react js

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

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