Is there a way to detect when the visible window is closed by the user?

[postmodern]

Hello, I want to open a visible instance of Ferrum::Browser, leave it open for the user, and wait for the user to then close the browser window, then call browser.quit and exit from Ruby. Is there some kind of wait_for_close callback event?

[postmodern]

After initializing Ferrum::Browser with a Debug logger that printed every debug message, it appears that a Inspector.detached message is sent back when the Chrome window is closed.

browser.on('Inspector.detached') do
  ...
end

I still don't have a good way to wait until the Inspector.detached message is sent, and let other on() callbacks to be called.

[postmodern]

Since every browser.on(...) { ... } block is executed using Concurrent Ruby, one cannot simply call exit as all exceptions are silently rescued within the blocks; and exit raises SystemExit. However, you can use this really simple solution that sets a local variable and busy waits until it's set:

window_closed = false

browser.on('Inspector.detached') do
  window_closed = true
end

until window_closed
  sleep(1)
end

browser.quit
exit

[route]

First of all I got rid of Async and now we raise errors in the threads. Second I think Target.targetDestroyed is closer to the Page/Tab/Window being closed.