Rvest: Headlines returning empty list - r

Question

I'm trying to replicate this tutorial on rvest here. However, at the start I'm already having issues. This is the code I'm using
library(rvest)
#Specifying the url for desired website to be scrapped
url <- 'https://www.nytimes.com/section/politics'
#Reading the HTML code from the website - headlines
webpage <- read_html(url)
headline_data <- html_nodes(webpage,'.story-link a, .story-body a')
My results when I look at headline_data return
{xml_nodeset (0)}
But in the tutorial it returns a list of length 48
{xml_nodeset (48)}
Any reason for the discrepancy?

Answer 1

As mentioned in the comments, there are no elements with the specified class you are searching for.
To begin, based on current tags you can get headlines with
library(rvest)
library(dplyr)
url <- 'https://www.nytimes.com/section/politics'
url %>%
read_html() %>%
html_nodes("h2.css-l2vidh a") %>%
html_text()
#[1] "Trump’s Secrecy Fight Escalates as Judge Rules for Congress in Early Test"
#[2] "A Would-Be Trump Aide’s Demands: A Jet on Call, a Future Cabinet Post and More"
#[3] "He’s One of the Biggest Backers of Trump’s Push to Protect American Steel. And He’s Canadian."
#[4] "Accountants Must Turn Over Trump’s Financial Records, Lower-Court Judge Rules"
and to get individual URL's of those headlines you could do
url %>%
read_html() %>%
html_nodes("h2.css-l2vidh a") %>%
html_attr("href") %>%
paste0("https://www.nytimes.com", .)
#[1] "https://www.nytimes.com/2019/05/20/us/politics/mcgahn-trump-congress.html"
#[2] "https://www.nytimes.com/2019/05/20/us/politics/kris-kobach-trump.html"
#[3] "https://www.nytimes.com/2019/05/20/us/politics/hes-one-of-the-biggest-backers-of-trumps-push-to-protect-american-steel-and-hes-canadian.html"
#[4] "https://www.nytimes.com/2019/05/20/us/politics/trump-financial-records.html"