var chatSupport = document.getElementsByClassName('chatSupport')
var chatSupportName = "";
var i;
for (i = 0; i < chatSupport.length; i++) {
//console.log("chatSupport[i]",chatSupport[i])
chatSupportName = chatSupport[i]
}
console.log("chatSupportName1",chatSupportName)
오 나도 이거 적어놨었는데