executeAsyncScript function

Execute JavaScript asynchronously on browser.

executeAsyncScript Inject a snippet of JavaScript into the page for asynchronous execution in the context of the currently selected frame.

executeAsyncScript(remDr, script, args = list(), replace = TRUE, ...)

Arguments

• remDr: An object of class "rDriver". A remote driver object see remoteDr.
• script: character: The script to inject.
• args: The arguments of the script as a list.
• replace: logical: If TRUE any elements identify as web Elements are converted to such.
• ...: Additonal function arguments - Currently passes the retry argument.

Returns

If replace is TRUE parses the response from the server for web Elements and converts as such. Otherwise the content returned is assummed to be a simple list.

Details

The driver will pass a callback as the last argument to the snippet, and block until the callback is invoked.

Examples

## Not run:

remDr <- remoteDr()
# Get the page source
remDr %>% go("https://www.google.com/ncr") %>%
  getPageSource

remDr %>% getTitle()
webElem <- remDr %>% findElement("css", "img#hplogo")
# check if the logo is hidden
remDr %>% executeScript("return document.getElementById('hplogo').hidden;", args = list())
# [1] FALSE
# hide the logo
remDr %>% executeScript("document.getElementById('hplogo').hidden = true;", args = list())
# Make the logo visible this time passing a web Element as an argument
remDr %>% executeScript(script = "return arguments[0].hidden = false;", args = list(webElem))

# Pass arguments
remDr %>% executeScript(script = "return argument[1] + argument[2];"
                        , args = list(1, 2))

# Return a web Element
remDr %>% executeScript(script = "return document.getElementById('hplogo');", args = list())
# ElementId: 0
# Remote Driver:
#   Remote Ip Address: http://localhost:4444/wd/hub
# Remote sessionId: 9a83672a-d72b-4873-aa7d-96f7f1f80fa0

# Return a web Element in a more complex object
script <- "var test ={num:1, str:'a', el:document.getElementById('hplogo')};return test;"
remDr %>% executeScript(script = script
                        , args = list())
# $str
# [1] "a"
#
# $num
# [1] 1
#
# $el
# ElementId: 0
# Remote Driver:
#   Remote Ip Address: http://localhost:4444/wd/hub
# Remote sessionId: 9a83672a-d72b-4873-aa7d-96f7f1f80fa0

# Run with replace = FALSE
remDr %>% executeScript(script = script
                        , args = list(), replace = FALSE)
# $str
# [1] "a"
#
# $num
# [1] 1
#
# $el
# $el$ELEMENT
# [1] "0"

remDr %>% setTimeout("script")

asScript <- "cb = arguments[0];setTimeout(function(){cb('DONE');},5000); "
system.time(test1 <- remDr %>% executeAsyncScript(asScript, args = list()))
sScript <- "setTimeout(function(){},5000); return 'DONE';"
system.time(test2 <- remDr %>% executeScript(sScript, args = list()))

remDr %>% deleteSession()
## End(Not run)

See Also

Other documentHandling functions: executeScript, getPageSource