executeAsyncScript: Execute JavaScript asynchronously on browser.

In seleniumPipes: R Client Implementing the W3C WebDriver Specification

Description

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

Usage

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.

Details

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

Value

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.

See Also

Other documentHandling functions: executeScript, getPageSource

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)

seleniumPipes documentation built on May 2, 2019, 5:57 a.m.