react实现页面后退按钮

react实现页面后退按钮

import React from 'react';
import PropTypes from "prop-types";

static contextTypes = {
    
    
   router: PropTypes.object.isRequired
};


backNav = () => {
    
    
    this.context.router.history.goBack();
}

render () {
    
    
	return (
		<Button className='btn' onClick={
    
    this.backNav}>
	       返回
	    </Button>
	)
}