Extracting Table using R

I am a beginner in R and was trying to extract different table data from different Websites. I was able to perform the basic data scraping, but I am stuck while trying to extract data from the following table.

url <- "https://www.nseindia.com/live_market/dynaContent/live_watch/equities_stock_watch.htm?cat=N"

I tried using the html_read & html_nodes function using css and xpath but it does not return a value. Could anyone advise me on how to proceed ?