I am creating an ajax request to subscribe to newsletter. The platform is Shopify so its a limited resource available for me to validate if the form is successful or not.
I would like to add a error message if email is already subscribed.
I created an ajax function that post data to Shopify URL
According to Shopify it does not return any error or message when email is already registered. One thing we can do is just checking if the posted URL has
?contact_posted=true then it means the form is successful. Otherwise I am assuming email is already registered.
On ajax success function how do I check if the submitted URL has this query string parameter
?contact_posted=true. Fyi the form action is redirected from
?contact_posted=true on success.
Any help would be appreciated.