can't use handleJavaScriptDialog

[Sunny-VBA]

when I use CDP framwork, I want to Accept or dismiss a JavaScript alert, and when using handleJavaScriptDialog function,it doesn't work,could you please help me to check whether handleJavaScriptDialog function works,or if it works,could you please tell me how to use it,many thanks~

[PerditionC]

It does work, however, it is somewhat limited in VBA.

E.g. given the following code:

    Dim b As AutomateBrowser: Set b = New_AutomateBrowser
    b.launch "www.google.com", whichBrowser:=Chrome
    b.alert "Hello from google. Let's do a search!"
    b.cdp.Page.handleJavaScriptDialog accept:=True

One would expect that the browser would load, display an alert, and then have it closed. However due to limitations of how VBA interacts, the b.alert call will not return until the alert dialog is closed. Now, if you pause the VBA code prior to the handleJavascriptDialog line and load a page that displays an alert box and then continue execution it should correctly dismiss the dialog. So if you are automating a page that displays a dialog, it should just work; but if you are invoking the dialog from vba it won't ever get a chance to run.

If you could provide an (somewhat simple) example site that displays the dialog [I don't feel like creating one myself], I can try to give better example code or see if there is some other issue effecting using this call. Note: I can't recall if its Chrome that blocks on the b.alert or due to the use of pipes; if its the later then if websocket interface is supported then above code may work as expected, but if its the former then there is nothing that can be done that I'm aware of to have it work.

[Sunny-VBA]

Dear Kenneth It worked if the website has the alert created mannually，I will try to use it，Many thanks

…

---- Replied Message ---- | From | Kenneth J ***@***.***> | | Date | 07/10/2025 10:08 | | To | PerditionC/VBAChromeDevProtocol ***@***.***> | | Cc | Sunny-VBA ***@***.***>, Author ***@***.***> | | Subject | Re: [PerditionC/VBAChromeDevProtocol] can't use handleJavaScriptDialog (Issue #18) | PerditionC left a comment (PerditionC/VBAChromeDevProtocol#18) It does work, however, it is somewhat limited in VBA. E.g. given the following code: Dim b As AutomateBrowser: Set b = New_AutomateBrowser b.launch "www.google.com", whichBrowser:=Chrome b.alert "Hello from google. Let's do a search!" b.cdp.Page.handleJavaScriptDialog accept:=True One would expect that the browser would load, display an alert, and then have it closed. However due to limitations of how VBA interacts, the b.alert call will not return until the alert dialog is closed. Now, if you pause the VBA code prior to the handleJavascriptDialog line and load a page that displays an alert box and then continue execution it should correctly dismiss the dialog. So if you are automating a page that displays a dialog, it should just work; but if you are invoking the dialog from vba it won't ever get a chance to run. If you could provide an (somewhat simple) example site that displays the dialog [I don't feel like creating one myself], I can try to give better example code or see if there is some other issue effecting using this call. Note: I can't recall if its Chrome that blocks on the b.alert or due to the use of pipes; if its the later then if websocket interface is supported then above code may work as expected, but if its the former then there is nothing that can be done that I'm aware of to have it work. — Reply to this email directly, view it on GitHub, or unsubscribe. You are receiving this because you authored the thread.Message ID: ***@***.***>