browser.EachEvent MustEvalOnNewDocument doesn't work

[gopkg-dev]

Rod Version: v0.112.8

The code to demonstrate your question

func Test_02(t *testing.T) {
	browser := rod.New().MustConnect()
	defer browser.MustClose()
	go browser.EachEvent(func(e *proto.TargetTargetCreated) {
		if e.TargetInfo.Type != proto.TargetTargetInfoTypePage {
			return
		}
		page := browser.MustPageFromTargetID(e.TargetInfo.TargetID)
		// Inject js to every new page
		page.MustEvalOnNewDocument(`window.addEventListener('load', () => {
document.body.innerHTML = '<h1>Hello, world!</h1><p id="test">This is my page content.</p>';
})`)
	})
	page := browser.MustPage("https://example.com/").MustWaitLoad()
	page.MustElement("#test")
	utils.Pause()
}

She did not execute js, did not modify the body.

[ysmood]

It's a limitation of cdp, you can't use it like this way. They don't allow you run MustEvalOnNewDocument before the page is created.

You should use MustEvalOnNewDocument like this:

	browser := rod.New().MustConnect()
	page := browser.MustPage()
	page.MustEvalOnNewDocument(`window.addEventListener('load', () => {
		document.body.innerHTML = '<h1>Hello, world!</h1><p id="test">This is my page content.</p>';
		})`)

	page.MustNavigate("https://example.com/")
	fmt.Println(page.MustElement("#test").MustText())

[gopkg-dev]

Thank you for letting me know about the limitation of cdp and how to use MustEvalOnNewDocument correctly. Your suggestion to navigate to the website first and then use MustEvalOnNewDocument after the page has loaded is very helpful. I appreciate your help on this matter.