Adobe Analytics: clear variables' values and events after beacons have been sent, instead of using s.clearVars().

adobe-analytics-clear-variables-using-registerPostTrackCallback-custom-code.js

s.registerPostTrackCallback(function(requestUrl, s) {
  _satellite.logger.warn('s.registerPostTrackCallback() called');

  // unset variables and events that are not needed after sending a beacon
  // BUT LEAVE BEHIND variables that should remain, e.g. those that are set in the Adobe Analytics extension itself

  var doNotUnsetVariables = [
    'pagename', // page name
    'hier1', // page hierarchy 1
    'server', // site server
    'channel', // site section
    // ... other variables
  ];
  var doNotUnsetVariablesRegExp = new RegExp('^(' + doNotUnsetVariables.join('|') + ')$');

  // find and erase all unneeded variables: eVar's, hier's, prop's, products
  var setVariables = Object.keys(s).filter(function (k) {
    return /^((eVar|hier|list|prop)[0-9]+|(purchase|transaction)ID|campaign|channel|pageType|products|state|zip)$/.test(k);
  });
  var unsetVariables = setVariables.filter(function (k) {
    return !doNotUnsetVariablesRegExp.test(k);
  });
  unsetVariables.forEach(function (v) {
    s[v] = '';
  });

  // erase all success events
  s.events = '';
}, s);