How to use frapee.call() in javascript getting Reference error: frappe is not defined

Frappe Framework
1

i made a html file in www folder of an app now i want to call a whitelist method from the html file i am trying to use frappe.call() in script tag in html file to call the whitelist method ie.,

prodify_admin@prodify-dev-01_ ~_frappe-bench_apps_membership_loyalty_membership_loyalty_www 07-11-2023 17_34_43
prodify_admin@prodify-dev-01_ ~_frappe-bench_apps_membership_loyalty_membership_loyalty_www 07-11-2023 17_34_431583×815 20.6 KB

but it is not working
so how can i use frappe.call() in javascript