问Webscraping -无法用R获取页面的全部内容

EN

library(RSelenium)
shell('docker run -d -p 4445:4444 selenium/standalone-firefox')
remDr <- remoteDriver(remoteServerAddr = "localhost", port = 4445L, browserName = "firefox")
remDr$open()

remDr$navigate("https://www.arbeitsagentur.de/jobsuche/suche?angebotsart=1&was=Soziologie%20(grundst%C3%A4ndig)%20(weiterf%C3%BChrend)&id=10000-1189146489-S")
Sys.sleep(10)
list_Button <- remDr$findElements("class name", "ergebnisliste-item")
Sys.sleep(3)
list_Link_Job_Descriptions <- lapply(X = list_Button, FUN = function(x) x$getElementAttribute("href"))

nb_Links <- length(list_Link_Job_Descriptions)
list_Text_Job_Description <- list()

for(i in 1 : nb_Links)
{
  print(i)
  remDr$navigate(list_Link_Job_Descriptions[[i]][[1]])
  Sys.sleep(1)
  web_Obj2 <- remDr$findElement("id", "jobdetails-beschreibung")
  list_Text_Job_Description[[i]] <- web_Obj2$getElementText()
}