javascript - After the binding event is created, it is triggered multiple times

Question

I encountered a problem. I chose to delete. When the pop-up window appeared, I chose to think again, and then selected another point to confirm the deletion. , two pieces of data are gone. I think it is because when you click Cancel for the first time, the following monitor was created but not triggered. When you click OK for the second time, the event created for the first time was triggered. What is the solution to this problem? solve?

Answer 1

Just undelete before binding

Answer 2

Click on the Remove event when I'm thinking

Answer 3

I think the _this you passed is wrong, please print _this.attr('dataId'); it is best to look at the tag structure

Answer 4

Open f12 and look at the network to see how many requests the frontend has sent to the backend, and observe what their parameters are.