Unable to click the Chrome popup dialog using KM

[chan.eber]

I have used to click buttons on the webpage using javascript through KM without any problem. However, I couldn't click the popup window in Chrome. Take an example...

In the print dialog, I would like to click the "Cancel" button.

In the console, I used the following script to click the button successfully
document.querySelector("body > print-preview-app").shadowRoot.querySelector("#sidebar").shadowRoot.querySelector("print-preview-button-strip").shadowRoot.querySelector("div > cr-button.cancel-button").click()

However, the same script didn't work by using KM

Certainly, I could use multiple keystokes ("tab") to perform the same task alternatively. However, I would like to understand why the JS failed in the popup dialog.

Thank you very much!

[griffman]

You might try disabling Modern Syntax using the disclosure triangle to the left of the JavaScript box. I'm not positive that'll work, but it's something to try.

-rob.

[chan.eber]

Thank you for your prompt reply! However, I've already tried to disable Modern syntax (as you mentioned it yesterday) but the script didn't work too.

[griffman]

Ah, sorry—didn't realize this was the same user :).

-rob.