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Analytics.js

  • Analytics.js

  • const text = `
    (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-81160060-1', 'auto');
    ga('send', 'pageview');
    `.replace(/\s*\n\s*/g, '');
    
    let alreadyListening = 0;
    
    export default class AnalyticsMiddleware {
    
    	handleRoute(next) {
    
    		if (typeof window !== "undefined" && !alreadyListening++) {
  • Only need to do this once, since the client controller lives across page views.

    			window.__reactServerClientController.on("pageview", pageview => {
    				window.ga('send', 'pageview', pageview);
    			});
    		}
    
    		return next();
    	}
    	getScripts(next) {
    		return next().concat({text});
    	}
    }