checkout-js-button-click-tracking.js

/*
    PayPal Button - Click Tracking
    ------------------------------
    
    1. Pass an `onClick` callback to the PayPal Button, which will be called for any clicks
    2. From there, call your preferred analytics service
*/

paypal.Button.render({

    payment: function(data, actions) {
        ...
    },

    onAuthorize: function(data, actions) {
        ...
    },
      
    onClick: function() {
        
        // This handler will be called for every click on the PayPal button
        // Fire off any analytics beacons from here
      
        // Google analytics example (taken from https://developers.google.com/analytics/devguides/collection/analyticsjs/events)
      
        ga('send', {
            hitType: 'event',
            eventCategory: 'Checkout',
            eventAction: 'button_click'
        });
    }

}, '#paypal-button-container');