从“React”导入React，{Component}；

导出类CountryCard扩展组件{构造函数（道具）{超级（道具）

    this.state = {
       selectedPlayer : ''
    }
}

selectPlayer = (e) => {
    this.setState({
        selectedPlayer : e.target.value
    });
};


render() {
    return (
        <div>
            <form>
                <select value={this.state.selectedPlayer} onChange={this.selectPlayer}>
                    <option value="select a player">select player</option>
                    <option value="Yuvraj Singh">Yuvraj Singh</option>
                    <option value="Gautam Gambhir">Gautam Gambhir</option>
                    <option value="Chris Gyle">Chris Gyle</option>
                    <option value="David Miller">David Miller</option>
                    <option value="Michael Hussey">MIchael Hussey</option>
                </select>
                <h1>{this.state.selectedPlayer}</h1>
            </form>
        </div>
    )
}

}

出口默认国家信用卡；