我正在使用php/mysql和jquery构建一个聊天室。我需要确保在任何时候都只显示10条消息。为此，我需要知道我的聊天室中聊天消息的div数量。我试过使用jquery大小和长度，但似乎都不起作用。请帮忙！
对于大小为m的写：$（#chat）.size（）；
$（#chat）将返回一个id为chat的div。我想你们的DIV并不都有相同的ID，因为ID必须是唯一的。我怀疑您有一个类（类=聊天）。
在这种情况下，您应该通过以下方式获得此类DIV的数量：
$( .chat ).size();
我还假设你错误地漏掉了“#聊天”周围的撇号。
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