Time-based page view tracker in HubSpot - can be added as a custom module and then can filter on custom events

pageview-tracker-over-time.html

<script>
$(document).ready(function() {
  // verbose: get current unix datetime - outputs in MS
  var dateNow = Date.now();

  // if the "cookie" already exists
  if (localStorage.getItem('viewCounter') !== null) {
    // shorthand for viewCounter
    var viewCounter = JSON.parse(localStorage.getItem('viewCounter'));
    
    // clean out any old view dates
    // 86400000 == milliseconds in a day
    var countLastThirty = viewCounter.filter(function(timestamp) {
      return (dateNow - timestamp) < {{ module.date_range_to_track * 86400000 }}; // check how many days between 
    });

    // add current datetime to end of countLastThirty
    countLastThirty.push(dateNow);

    // check full length of array - are we over threshhold?
    while (countLastThirty.length > {{ module.page_views_in_date_range }}) {
      countLastThirty.shift();
    }

    // at 10 items that are within 30 days - time to fire event
    if (countLastThirty.length === {{ module.page_views_in_date_range }}) {
      // fire event
      _hsq.push(["trackEvent", { id: `Viewed {{ module.page_views_in_date_range }} pages in {{ module.date_range_to_track }} days` }]);
    }
    localStorage.setItem('viewCounter', JSON.stringify(countLastThirty));
  } else {
    localStorage.setItem('viewCounter', JSON.stringify([dateNow]));
  }
});
</script>