Chrome

Description Usage Arguments Value Examples

When Chromium/Chrome is started in debugging mode, several HTTP endpoints are available. Using these endpoint, one can retrieve information from Chromium/Chrome or send commands, see https://chromedevtools.github.io/devtools-protocol/#endpoints.

fetch_version(host = "localhost", port = 9222, secure = FALSE)

list_targets(host = "localhost", port = 9222, secure = FALSE)

fetch_protocol(host = "localhost", port = 9222, secure = FALSE, local = FALSE)

new_tab(host = "localhost", port = 9222, secure = FALSE, url = NULL)

activate_target(host = "localhost", port = 9222, secure = FALSE, target_id)

close_target(host = "localhost", port = 9222, secure = FALSE, target_id)

inspect_target(host = "localhost", port = 9222, secure = FALSE, target_id)

`host`	Character scalar, the host name of the application.
`port`	The remote debugging port (a numeric or a character scalar).
`secure`	A logical indicating whether a secure protocol shall be used.
`local`	Logical scalar, indicating whether the local version of the protocol (embedded in `crrri`) must be used or the protocol must be fetched remotely.
`url`	URL to open in a new tab.
`target_id`	Target (or tab) identifier.

fetch_version(), list_targets(), fetch_protocols() and new_tab() return a list. activate_target() and close_target() returns a logical: TRUE is returned when the command succeeds, FALSE is returned if a wrong target_id is provided.

## Not run: 
chrome <- Chrome$new()

# fetch information about headless Chrome
fetch_version()
# fetch the Chromium/Chrome protocol
protocol <- fetch_protocol()

# get the list of opened tabs
list_targets()
# open an url in a new tab
new_target <- new_tab(url = "http://r-project.org")
# the new tab is referenced in the list of opened tabs
list_targets()
# inspect a target in a web browser
if(interactive()) inspect_target(target_id = new_target$id)
# close the previous created tab
close_target(target_id = new_target$id)

chrome$close()

## End(Not run)