react-router4 Route中的children属性作用是什么

Question

看了官方文档，没想明白是干什么的，和Route的render属性有什么区别？

const OldSchoolMenuLink = ({ label, to, activeOnlyWhenExact }) => (

    <Route path={to} exact={activeOnlyWhenExact} children={({match}) => (

        <div className={match ? 'active' : ''}>

            {match ? '>' : ''}<Link to={to}>{label}</Link>

        </div>

    )}></Route>

);

Answer 1

找到官方解释了Sometimes you need to render whether the path matches the location or not. In these cases, you can use the function children prop. It works exactly like render except that it gets called whether there is a match or not.