我有一个这样的div：
<DIV CLASS="variable productPopup"></DIV>
当将其分配给变量时，我如何仅选择变量？请注意，变量会改变，因此需要选择第一个项目，而不是文字上的“变量”。
var ID = $(this).attr("class");
要获取所提到的第一类，您可以通过空格分隔值：
var firstClass = $(this).attr("class").split(" ")[0];
所以，如果类属性是“foo Bar”，你会得到“foo”。
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