Meta tags

One row per <meta> element below the given nodes (and the nodes themselves), in document order. Duplicates are kept, so OpenGraph (og:* in property), Twitter cards and Dublin Core (name) come out as rows to filter.

Usage

html_meta(x)

Arguments

x

A zuhtml_document or zuhtml_nodeset.

Value

A data frame with character columns name, property, http_equiv, charset and content, each the attribute as written (decoded) or NA when absent. name, property and http_equiv keep their case; compare with tolower().

See also

Other metadata: html_json_ld(), html_microdata(), html_title()

Examples

doc <- html_parse(paste0(
  "<meta charset='utf-8'>",
  "<meta name='description' content='A page.'>",
  "<meta property='og:title' content='Title'>",
  "<meta property='og:image' content='a.png'>",
  "<meta property='og:image' content='b.png'>"
))
meta <- html_meta(doc)
meta
#>          name property http_equiv charset content
#> 1        <NA>     <NA>       <NA>   utf-8    <NA>
#> 2 description     <NA>       <NA>    <NA> A page.
#> 3        <NA> og:title       <NA>    <NA>   Title
#> 4        <NA> og:image       <NA>    <NA>   a.png
#> 5        <NA> og:image       <NA>    <NA>   b.png
meta$content[meta$property %in% "og:image"]
#> [1] "a.png" "b.png"