Wix Email Marketing events are triggered when certain events occur with email marketing in your site's backend. You can write event handlers that react to these events. Event handler functions receive data that correspond to the backend event that has occurred. Use event handlers to create custom responses to email marketing events.
Note: Backend events aren't triggered when previewing your site.
To add an email marketing event handler, add an events.js file to the Backend section of your site if one does not already exist. All event handler functions for your site are defined in this file.
Event handler functions are defined using the following pattern:
For example, an event handler that handles the creation of a site member looks like this: