倒计时

constructor(props) { 
super(props);
 this.state = { time: 60, disabled: false, }; 
} 
countDown = () => { 
let time = this.state.time;
 if (time === 1) { 
this.setState({ disabled: false, time: 60, });
 } else { 
clearInterval(this.Timer);
 this.setState({ disabled: true, time: time - 1, }); 
this.Timer = setTimeout(this.countDown.bind(this), 1000); 
} }; 
handleClick = () => { this.countDown(); }; 
resetClick = () => { 
clearInterval(this.Timer); 
this.setState( { disabled: false, time: 60, }, () => this.countDown() ); 
}; 
render() { 
return (
<div>
        <button type="primary" disabled={this.state.disabled} onclick={this.handleClick}>
          {this.state.time}
        </button>
        <button type="primary" onclick={this.resetClick}>
          reset
        </button>
      </div>
)};