Opt-In at Checkout for Custom Apps

1. Ensure the Voyage Global Tag is installed on the page
2. A checkbox needs to be added with the following Marketing Acceptance verbiage:
   
   1. "I agree to receive emails or SMS messages from [your name]. By joining via text messages, you agree to receive recurring marketing messages from [your name] at the mobile number used to send the join text message. Msg & data rates may apply. Msg frequency is recurring. Consent is not a condition of purchase. STOP to unsubscribe, HELP for help. View Terms & Privacy" 
3. Once the checkbox is checked and the customer submits the checkout, you need to pass Voyage the phone number like in the following:
   

   if (acceptsMarketing) {
     const marketingPhone = '+15555555555';
     if (marketingPhone && marketingPhone.length > 9) {
       voyage.track('MarketingPhone', { marketingPhone });
     } else {
       // Notify of invalid phone number 
     }
   } else {
     // Notify of missing "Marketing Acceptance" checkbox
   }