rvest:如何查找HTML页面中使用的所有类？

将@ hadley的注释转换为CW答案,您可以使用*通配符获取所有类的向量.

因此,该方法看起来像:

page <- read_html(doc_url)

page %>% 
  html_nodes("*") %>% 
  html_attr("class") %>% 
  unique()
#  [1] NA                          "component"                 "waitBlock"
#  [4] "waitBlockContainer"        "toggle_img"                "btn_impression"
#  [7] "document_language"         "outputEcli"                "C19Centre"
# [10] "C71Indicateur"             "C02AlineaAltA"             "C72Alineadroite"
# [13] "C75Debutdesmotifs"         "C01PointnumeroteAltN"      "C04Titre1"
# [16] "C03Tiretlong"              "C05Titre2"                 "C06Titre3"
# [19] "C07Titre4"                 "C48DispositifIntroduction" "C08Dispositif"
# [22] "C77Signatures"             "C49FootnoteLangue"