react-router 4.0版本怎么实现以前onEnter的效果

Question

查看了官方文档,好像并没有说到这个

Answer 1

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.