What is "Could not find object with given id" ?

[rluisr]

Rod Version: v0.87.2

I want to access the element after logging in to Twitter, but I get an error when I run fmt.Println(page.MustElement("title").MustText()).
I checked a login code is redirected to the user timeline so I think it's working perfectly.

error

[rod] 2021/01/04 01:19:34 [eval] {"js":"rod.element","params":["title"]}
panic: {-32000 Could not find object with given id }

code

func main() {
	l := launcher.New().
		Headless(false).
		Devtools(true)
	defer l.Cleanup()

	url := l.MustLaunch()
	browser := rod.New().
		ControlURL(url).
		Trace(true).
		SlowMotion(1 * time.Second).
		MustConnect()

	launcher.NewBrowser().Open(browser.ServeMonitor(""))
	defer browser.MustClose()

	// Login
	page := browser.MustPage("https://twitter.com/login")

	wait := page.MustWaitRequestIdle("live_pipeline")

	page.MustElement(`[name="session[username_or_email]"]`).MustInput("")
	page.MustElement(`[name="session[password]"]`).MustInput("")
	page.Keyboard.MustPress(input.Enter)

	wait()

	// Output page title after login
	fmt.Println(page.MustElement("title").MustText())

	utils.Pause()
}

[ysmood]

If you read the API doc, the rod.Element struct is just a reference id for a remote object in the browser, in your case, it's a remote <title> object:

The error means the object doesn't exist anymore.

I tried your code, it works fine for me, it will print the title: Login on Twitter / Twitter

[ysmood]

If you use an outdated rod.Element it will happen, such as the page uses js to dynamically remove the remote object, or page reloading, etc.