https://www.senfoelger.dk/js/forms/FormsCustomEvents.js?v=MTQuMDkuMjAyNiAwOS4xOC40MA==

1if (typeof $$epiforms !== 'undefined') {
2    $$epiforms(document).ready(function myfunction() {
3        $$epiforms(".EPiServerForms").on("formsStartSubmitting formsSubmitted",
4			function (event, param1, param2) {
5                if ($$epiforms(this).find("#useSpinner")?.length > 0) {
6                    // If start start spinner: Show()
7                    if (event.type == "formsStartSubmitting") {
8                        $$epiforms(".kb-spinner-overlay").first().show();
9                    }
10                    
11                    // If error stop spinner: Hide()
12                    if (event.type == "formsSubmitted") {
13                        $$epiforms(".kb-spinner-overlay").first().hide();
14                    }
15                }
16            });
17    });
18}