Track Speed Index RUM results using Google Analytics

speedindex.js

var speedIndexResult = RUMSpeedIndex(); // Calculate the speed index for this page
document.getElementById('speedIndexResult').innerHTML = Math.round(speedIndexResult); // Display it on the page

// Include the GA script
(function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){
(i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o),
m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m)
})(window,document,'script','https://www.google-analytics.com/analytics.js','ga');

ga('create', 'UA-84298674-1', 'auto');
ga('send', 'pageview');

// Push the speed index results to GA
ga('send', 'event', 'RUM', 'Speed Index RUM', 'Speed Index', speedIndexResult);