9. get-elements-by-class-recursive 関数 ypooo.hatenablog.com (defun get-elements-by-class-recursive (node class-name) (let (found-elements) (plump:traverse node (lambda (element) (when (and (plump:element-p element) (stringp (plump:attribute element "class"))) (when (member class-name (split-sequen…