TypeError：$（...）[0]未定义

Question

在我的聊天脚本中，以下行发生错误：

$("#chatbox_"+chatboxtitle+" .chatboxcontent")
.scrollTop($("#chatbox_"+chatboxtitle+" .chatboxcontent")[0].scrollHeight);
setTimeout('$("#chatbox_"+chatboxtitle+" .chatboxcontent")
.scrollTop($("#chatbox_"+chatboxtitle+" .chatboxcontent")[0].scrollHeight);', 100);

Answer 1

试试这个

setTimeout(function () {
    $("#chatbox_"+chatboxtitle+" .chatboxcontent")
    .scrollTop($("#chatbox_"+chatboxtitle+" .chatboxcontent")[0].scrollHeight);
}, 100);