import React from 'react';

class NotFound extends React.Component{
    state ={
        count:5
    };
    componentDidMount(){
        this.timer = setInterval(()=>{
            let count = this.state.count;

            this.setState({
                count:count-1
            });

            if(count===1){
                this.props.history.push('/home')
            }
        },1000);
    }
    componentWillUnmount(){
        clearInterval(this.timer);
    }
    render(){
        return (<div>
            <h2>404页面没有找到 <span className="text-danger">{this.state.count}</span> s</h2>
        </div>)
    }
}

export default NotFound;