content: import React from 'react';
  
  const getAnalyticsScript = id => {
    return `
  (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','//www.google-analytics.com/analytics.js','ga');
  ga('create', '${id}', {cookieDomain: 'auto', siteSpeedSampleRate: 100});
  ga('send', 'pageview');
  `.replace(/\n/g, '');
  };
  
  const GoogleAnalytics = props => {
    let markup = { __html: getAnalyticsScript(props.id) };
    return <script dangerouslySetInnerHTML={markup} />;
  };
  
  export default GoogleAnalytics;
  