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

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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)

 

引起錯誤的寫法：

運行正常的寫法：

 

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