How to navigate Chrome settings using `chromedp`?

Question

I'm trying to navigate the Chrome settings page using chromedp in go.

The full example is here, but the gist is something very basic and simple:

//...
if err := cdp.Run(ctx,
    cdp.Navigate(`chrome://settings/content/location`),
    cdp.SendKeys(`#input`, "hello"),
); err != nil && !strings.Contains(err.Error(), "net::ERR_ABORTED") {
    log.Fatal(err)
}
//...

Ostensibly, the settings page at chrome://settings/content/location has a DOM, and the search field looks like an input field (with the ID #input). And yet, trying to interact with it through chromedp fails: chromedp does not seem to find it at all.

For some background, I am trying to configure some aspects of Chrome, namely automatically denying location requests, which do not seem to have a command line flag. Or at least I was not able to find one. My example above interacts with the input field because it seem it would be easier to select.

What I really want is to click on the radio button which says "don't allow websites to see your location". Similar to the input field above, I can not figure out the correct incantation that will cause chromedp to select a specific radio button. If there is an alternative way to achieve this, I'm all ears. I would, however, like to avoid needing a pre-populated userdir if possible. I'm new to chromedp so I apologize if this is something trivial. Yet, I couldn't find an answer. There is a similar question about selenium, but I think chromedp may be sufficiently different that the answer may be different too.

score 0 · Answer 1 · answered May 18 '22 at 06:27

You can not find the element because it's a shadow element. With chromedp, you can search shadow elements with chromedp.ByJSPath. Here is an example copied from https://github.com/chromedp/chromedp/issues/1050#issuecomment-1085474910:

package main

import (
    "context"
    "log"

    "github.com/chromedp/chromedp"
)

func main() {
    ctx, cancel := chromedp.NewContext(context.Background())
    defer cancel()

    if err := chromedp.Run(ctx,
        chromedp.Navigate("chrome://settings/handlers"),
        chromedp.Click(`document.querySelector("body > settings-ui").shadowRoot.querySelector("#main").shadowRoot.querySelector("settings-basic-page").shadowRoot.querySelector("#basicPage > settings-section > settings-privacy-page").shadowRoot.querySelector("#pages > settings-subpage > protocol-handlers").shadowRoot.querySelector("#protcolHandlersRadioBlock")`, chromedp.ByJSPath),
    ); err != nil {
        log.Fatal(err)
    }
}

How to navigate Chrome settings using `chromedp`?

1 Answers1