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selenider and rvest
In selenider: Concise, Lazy and Reliable Wrapper for 'chromote' and 'selenium'
available <- selenider::selenider_available()
knitr::opts_chunk$set(
collapse = TRUE,
comment = "#>",
eval = available
)
message("Selenider is not available")
selenider can be a useful add-on to rvest, for when scraping data requires
interaction with a website.
rvest is very similar to selenider, but is designed for static webpages rather
than interactive ones.
library(rvest)
library(selenider)
To start, let's open https://www.r-project.org/
open_url("https://www.r-project.org/")
First, we will interact with the website with selenider. We would like
to find the most recent post by R on Mastodon, and follow the link to the
original post.
s(".mt-timeline") |>
find_element("article") |>
elem_attr("data-location") |>
open_url()
Now, we would like to parse the text of the post using rvest::html_text2().
We can do this in two ways, either by locating the element containing the post
using selenider then parsing it using rvest, or by parsing the entire page using
rvest and finding the element after. The two methods are very similar, since
selenider and rvest use a very similar syntax, except rvest uses the html_
prefix rather than the elem_ prefix.
We can convert between selenider elements and rvest (or more precisely, xml2)
documents using rvest::read_html() or xml2::read_html().
Note that when converting elements to rvest nodes, the element will be wrapped
in a <body> tag.
# First method
rvest_element <- s(".columns-area") |>
find_element(".status__content") |>
read_html()
rvest_element
html_text2(rvest_element)
Reading the HTML of an entire page can be done using get_page_source().
Note that rvest::html_element() is equivalent to find_element(), but
works only on static HTML.
get_page_source() |>
html_element(".columns-area") |>
html_element(".status__content") |>
html_text2()
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selenider documentation built on April 3, 2025, 5:51 p.m.
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available <- selenider::selenider_available() knitr::opts_chunk$set( collapse = TRUE, comment = "#>", eval = available )
message("Selenider is not available")
selenider can be a useful add-on to rvest, for when scraping data requires interaction with a website.
rvest is very similar to selenider, but is designed for static webpages rather than interactive ones.
library(rvest) library(selenider)
To start, let's open https://www.r-project.org/
open_url("https://www.r-project.org/")
First, we will interact with the website with selenider. We would like to find the most recent post by R on Mastodon, and follow the link to the original post.
s(".mt-timeline") |> find_element("article") |> elem_attr("data-location") |> open_url()
Now, we would like to parse the text of the post using rvest::html_text2().
We can do this in two ways, either by locating the element containing the post
using selenider then parsing it using rvest, or by parsing the entire page using
rvest and finding the element after. The two methods are very similar, since
selenider and rvest use a very similar syntax, except rvest uses the html_
prefix rather than the elem_ prefix.
We can convert between selenider elements and rvest (or more precisely, xml2)
documents using rvest::read_html() or xml2::read_html().
Note that when converting elements to rvest nodes, the element will be wrapped
in a <body> tag.
# First method rvest_element <- s(".columns-area") |> find_element(".status__content") |> read_html() rvest_element html_text2(rvest_element)
Reading the HTML of an entire page can be done using get_page_source().
Note that rvest::html_element() is equivalent to find_element(), but
works only on static HTML.
get_page_source() |> html_element(".columns-area") |> html_element(".status__content") |> html_text2()
Try the selenider package in your browser
Any scripts or data that you put into this service are public.
R Package Documentation
Browse R Packages
We want your feedback!
Note that we can't provide technical support on individual packages. You should contact the package authors for that.
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