this.$dob = $(this.$elements.dob);
this.$dob.on('input', this.myHandler);
private myHandler = (): void => {
const dob = this.$dob.val() as string;
const dobRegex = new RegExp('^[0-9/]*$');
if (dob.length > 0) {
const c = dob.substr(-1);
if (dobRegex.test(c)) {
this.$dob.val(dob);
} else {
this.$dob.val(dob.slice(0, -1));
}
}
}