How to call Digital Signature using JavaScript?

[ideepak]

My requirement is to show warning message before signing the document without customizing the PDF.

For this I am creating custom menu to execute below action in sequence:

1. Execute JavaScript to show alert 
2. And then pop up digital signature

Below is the Javascript:

var DoMyMenuItem = app.trustedFunction(function(cItemName) {
    app.beginPriv();
    app.execMenuItem(cItemName);
    app.endPriv();
});

function CallMenu() {
    try {
        app.execMenuItem("FillSignApp");
        //DoMyMenuItem("Signatures");
    } catch (e) {
        app.alert("Error: " + e);
    }
}
app.addMenuItem({ cName: "My Action Menu", cParent: "Help", cExec: "CallMenu(); " });

I am getting this error "Error: InvalidArgsError: Invalid arguments." on runtime. 

Is there anywhere I can show warning message to user before signing document and Is there a way to call Digital Signature using JavaScript execMenuItem function?

[ls_rbls]

Where are you trying to run these scripts from?

Another text field ? or as an javascript action that executes when the signer clicks on the signature field?

[ideepak]

I have created "Config.js" and kept inside "C:\Program Files (x86)\Adobe\Acrobat DC\Acrobat\Javascripts"

Refer this link - https://acrobatusers.com/tutorials/add_custom_menu_items/

[try67]

Where did you get this menu item name from? It doesn't work even from the Console...

[ideepak]

You are correct, this script is not working. I want to know what need to be pass inside app.execMenuItem method to open signature popup.

For example, try replacing below line in above code.

app.execMenuItem("ReadingMode");

Note: You need to close the Adobe and open again.  After then open any pdf document and click on new menu "My Action Menu" under help.

[try67]

There's no menu item from signing a Signature field. It can be done using the signatureSign method of the Field object. Read the documentation carefully before using it.