nl_tokens: 主体CSS等待事件
pl_tokens: function ( callback ) { var cssname = 'layer' , <mask> = '' , path = ( isLayui ? 'modules/layer/' : 'theme/' ) + 'default/layer.css?v=' + layer . v + ver ; isLayui ? layui . addcss ( path , callback , cssname ) : ready . link ( path , callback , cssname ) ; return this ; }