Dialogs and authentication

A few interactions on the remote page surface as dialogs in the inspector panel, since they can’t be shown inside the screencast image itself:

JavaScript dialogs (alert / confirm / prompt / beforeunload)

When the page calls alert(), confirm(), prompt(), or triggers a beforeunload warning, CDP Inspector intercepts it (Page.javascriptDialogOpening) and shows its own dialog instead of letting it block invisibly. prompt() gets a text field pre-filled with the page’s default value; the Cancel button is hidden for a plain alert (there’s nothing to decline); and for beforeunload the buttons relabel to “Leave”/“Stay”. Screencast input is paused while a dialog is open.

HTTP authentication

If the page hits a resource requiring HTTP Basic/Digest auth, a credentials dialog appears (origin, scheme, and realm shown) backed by Fetch.continueWithAuth. Multiple simultaneous challenges queue up and are shown one at a time. Credentials you enter are redacted to [redacted] before being written into the visible Message log, so they’re never accidentally exposed there or in an exported log file.