as.list.selenider_elements: Iterate over an element collection

In selenider: Concise, Lazy and Reliable Wrapper for 'chromote' and 'selenium'

Iterate over an element collection

Description

This function essentially turns x into: list(x[[1]], x[[2]], ...) However, to do this, the length of x must be computed. This means that while each element inside the list is still lazy, the list itself cannot be considered lazy, since the number of elements in the DOM may change. To avoid problems, it is recommended to use an element list just after it is created, to make sure the list is an accurate representation of the DOM when it is being used.

Usage

## S3 method for class 'selenider_elements'
as.list(x, timeout = NULL, ...)

Arguments

x	A selenider_elements object.
timeout	How long to wait for x to exist while computing its length.
...	Not used.

Details

Transform a selenider_elements object into a list of selenider_element objects. The result can then be used in for loops and higher order functions like lapply()/purrr::map() (whereas a selenider_element object cannot).

Value

A list of selenider_element objects.

See Also

• elem_flatten() to combine multiple selenider_element/selenider_elements objects into a single object.

• find_each_element() and find_all_elements() to select elements using an element collection while preserving laziness.

Examples

html <- "
<div id='div1'>
  <p>Text 1</p>
</div>
<div id='div2'>
  <p>Text 2</p>
</div>
<div id='div3'>
  <p>Text 3</p>
</div>
<div id='div4'>
  <p>Text 4</p>
</div>
"

session <- minimal_selenider_session(html)

p_tags <- ss("p")

for (elem in as.list(p_tags)) {
  print(elem_text(elem))
}

p_tags |>
  as.list() |>
  lapply(elem_text)

selenider documentation built on April 3, 2025, 5:51 p.m.