Catalog item - Validation for phone number - variable - On change client script

function onChange(control, oldValue, newValue, isLoading) {
    if (isLoading || newValue == '') {
        return;
    }

    //Type appropriate comment here, and begin script below
    var pattern = /^[(]?(\d{3})[)]?[-|\s]?(\d{3})[-|\s]?(\d{4})$/;

    if (!pattern.test(newValue)) {
        alert('Phone enter a valid phone number');
        g_form.setValue('variable_name', '');
    }
}

pattern = r"\d{4}/\d{2}/\d{2}"
text_to_search = "The date of creation is 2019/03/12 and date of expiration is 2021/03/01"
re.findall(pattern, text_to_search)

given_string = "I moved to Paris 75011, it's closer to my workplace."
zip_code_pattern = r"\d{5}"
re.findall(zip_code_pattern, given_string)