dataCallback.html

<script src="https://cdn.ravenjs.com/3.20.1/raven.min.js" crossorigin="anonymous"></script>
<script>
    Raven.config('https://<SENTRY_PUBLIC_DSN>@sentry.io/<SENTRY_PROJECT_ID>', {
        dataCallback: function(data) {
          // scrub sensitive information from data. returned mutated data will get sent as request payload
          return data;
        }
    }).install();
</script>