<a> tag?

Question

I came across the tag <a attr="idx0" title="Youku" href="http://www.youku.com/">Youku</a> and I don't know what the attribute attr is. I have searched for it for hours but I still can't find it. Does anyone know what it means?

Answer 1

这只是一个属性。您注意到它的网站只定义了这样的自定义属性，并且可能使用JavaScript访问它。