Mask card numbers

Applies the mask to all forms with the specified form key to hide card numbers.

(function()
{
    let doc = Api.GetDocument();
    let allForms = doc.GetAllForms();
    allForms.forEach(form => {
        if(form.GetFormKey() == "CardNumber") {
            let input = form.GetText();
            //Keep the first 4 characters and the last 2 characters
            let firstPart = input.slice(0, 4);
            let lastPart = input.slice(-2);
            //Create a middle part with asterisks
            let maskedPart = '*'.repeat(10);
            //Set masked string
            let result = firstPart + maskedPart + lastPart;
            form.SetText(result);
        }
    });
})();

Methods used: GetDocument, GetAllForms, GetFormKey, GetText, SetText

Result