There is an internal error in the React performance measurement code.Did not expect componentDidMount timer to start while render timer is still in progress for another instance

一、There is an internal error in the React performance measurement code.Did not expect componentDidMount timer to start while render timer is still in progress for another instance

 

二、_this3._toDetail is not a function.(In ‘this3._toDetail()’,’_this3._toDetail’ is undefined)

 

引起错误的写法：

运行正常的写法：