問(wèn)題描述

查看了官方文檔,好像并沒有說(shuō)到這個(gè)

問(wèn)題解答

React Router v3 provides onEnter, onUpdate, and onLeave methods. These were essentially recreating React’s lifecycle methods.

With v4, you should use the lifecycle methods of the component rendered by a <Route>. Instead of onEnter, you would use componentDidMount or componentWillMount. Where you would use onUpdate, you can use componentDidUpdate or componentWillUpdate (or possibly componentWillReceiveProps). onLeave can be replaced with componentWillUnmount.