button.jsx

import React from 'react';

class  Button extends React.Component {
    state = { 
        count :0,
    }
    handleClick = ()=>{
        this.setState({
            count: this.state.count + 1,
        })
    }
    render() { 
        const {count} = this.state
        return (
            <div>
                <h1>Manzanas : {count}</h1>
        <button type="button" onClick={this.handleClick}>Click</button>
            </div>
        )
    }
}

export default Button