event.currentTarget이 사라졌다. - prgrms-web-devcourse/Team_Alchomist_ShakeNMatch_FE GitHub Wiki

Note: The value of event.currentTarget is only available while the event is being handled. If you console.log() the event object, storing it in a variable, and then look for the currentTarget key in the console, its value will be null. Instead, you should either use console.log(event.currentTarget) to be able to view it in the console or use the debugger statement, which will pause the execution of your code thus showing you the value of event.currentTarget.

https://developer.mozilla.org/en-US/docs/Web/API/Event/currentTarget