Google Analytics - Universal or Legacy?

ga-check.js

/**
 * Check whether we have the legacy or universal lib available
 * 
 * https://developers.google.com/analytics/devguides/collection/upgrade/reference/gajs-analyticsjs
 * 
 */
if(typeof _gaq !== 'undefined') {
    console.log('ga.js'); // or via GTM?
}
else if(typeof ga !== 'undefined') {
    console.log('analytics.js');
}
else {
    // No GA available on page :(
}