import React from 'react';

class ButtonToClick extends React.Component {
    handleClick = () => {
        if (typeof this.props.fn === 'function') {
            this.props.fn();
        }
    }

    render() {
        return <button onClick={this.handleClick}>Klik</button>
    }
}

export default class ButtonCounter extends React.Component {
    constructor(props) {
        super(props);

        this.state = {
            counter: 0
        }
    }

    increment = () => {
        this.setState({
            counter: this.state.counter + 1
        });
    }

    render() {
        return (
            <div>
                <h1>{this.state.counter}</h1>
                <ButtonToClick fn={this.increment}/>
                <ButtonToClick fn={this.increment}/>
            </div>
        )
    }
}