e.target / e.currentTarget / this / $(this)

https://jmjmjm.tistory.com/134

console.log(event.currentTarget); // <div class="replyTrigger">..</div>
console.log($(this)); // r.fn.init [div.replyTriger]
console.log(this); // <div class="replyTrigger">..</div>
// tip) 즉 this = event.currentTarget