While debug copy & paste functions

ngGetWrongFormControls.js

// Select <gh-event> in Elements panel then in
// Console paste:
var eventForm = ng.probe($0).componentInstance.eventForm;
var FormArray = eventForm.constructor;
var FormGroup = eventForm.controls[0].constructor;
var findInvalidControlsRecursive = function findInvalidControlsRecursive(formToInvestigate) {
    var invalidControls = [];
    var recursiveFunc = function (form) {
        Object.keys(form.controls).forEach(function (field) {
            var control = form.get(field);
            if (control.invalid)
                invalidControls.push(field);
            if (control instanceof FormGroup) {
                recursiveFunc(control);
            }
            else if (control instanceof FormArray) {
                recursiveFunc(control);
            }
        });
    };
    recursiveFunc(formToInvestigate);
    return invalidControls;
};
findInvalidControlsRecursive(eventForm);