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Nearest ancestor matching a selector

Source: R/select.R
html_closest.Rd

For each node, the node itself if it matches css, otherwise its nearest ancestor element that does, as the DOM's closest() and jQuery's .closest(). Use it to go from a cell or a link to the row, card or section that contains it. :scope is the node itself.

Usage

html_closest(x, css)

Arguments

x

A zuhtml_document or zuhtml_nodeset.

css

A CSS selector: a single string.

Value

A zuhtml_nodeset as long as x: for each node, the matching element, or a missing node where there is none (and for missing nodes).

See also

Other navigation: html_children(), html_elements()

Examples

doc <- html_parse(paste0(
  "<table><tr id=a><td>1<td><b>x</b></tr>",
  "<tr id=b><td>2<td><b>y</b></tr></table>"
))
bold <- html_elements(doc, "b")
html_attr(html_closest(bold, "tr"), "id")
#> [1] "a" "b"
html_closest(bold, "ul")
#> <zuhtml_nodeset[2]>
#> [1] <missing>
#> [2] <missing>