Referencia de la etiqueta de Google Analytics

En este documento, se proporciona una explicación detallada del código incluido en la etiqueta recomendada de Google Analytics y la etiqueta asíncrona alternativa.

Esta información solo tiene fines educativos, ya que, por lo general, la etiqueta se debe usar en su forma reducida, ya que el impacto en el rendimiento será menor en los usuarios.

La etiqueta de Google Analytics

En las siguientes dos secciones, se muestran las versiones reducidas y no reducidas de la etiqueta de Google Analytics.

Versión minimizada

<!-- Google Analytics -->
<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-XXXXX-Y', 'auto');
ga('send', 'pageview');
</script>
<!-- End Google Analytics -->

Versión sin reducir

<!-- Google Analytics -->
<script>
/**
 * Creates a temporary global ga object and loads analytics.js.
 * Parameters o, a, and m are all used internally. They could have been
 * declared using 'var', instead they are declared as parameters to save
 * 4 bytes ('var ').
 *
 * @param {Window}        i The global context object.
 * @param {HTMLDocument}  s The DOM document object.
 * @param {string}        o Must be 'script'.
 * @param {string}        g Protocol relative URL of the analytics.js script.
 * @param {string}        r Global name of analytics object. Defaults to 'ga'.
 * @param {HTMLElement}   a Async script tag.
 * @param {HTMLElement}   m First script tag in document.
 */
(function(i, s, o, g, r, a, m){
  i['GoogleAnalyticsObject'] = r; // Acts as a pointer to support renaming.

  // Creates an initial ga() function.
  // The queued commands will be executed once analytics.js loads.
  i[r] = i[r] || function() {
    (i[r].q = i[r].q || []).push(arguments)
  },

  // Sets the time (as an integer) this tag was executed.
  // Used for timing hits.
  i[r].l = 1 * new Date();

  // Insert the script tag asynchronously.
  // Inserts above current tag to prevent blocking in addition to using the
  // async attribute.
  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');

// Creates a default tracker with automatic cookie domain configuration.
ga('create', 'UA-XXXXX-Y', 'auto');

// Sends a pageview hit from the tracker just created.
ga('send', 'pageview');
</script>
<!-- End Google Analytics -->

Etiqueta asíncrona alternativa

En las siguientes dos secciones, se muestran las versiones reducidas y no reducidas de la etiqueta asíncrona alternativa. Consulta Cómo agregar analytics.js a tu sitio para obtener detalles sobre el código que debes usar.

Versión reducida

<!-- Google Analytics -->
<script>
window.ga=window.ga||function(){(ga.q=ga.q||[]).push(arguments)};ga.l=+new Date;
ga('create', 'UA-XXXXX-Y', 'auto');
ga('send', 'pageview');
</script>
<script async src='https://www.google-analytics.com/analytics.js'></script>
<!-- End Google Analytics -->

Versión sin reducir

<!-- Google Analytics -->
<script>
// Creates an initial ga() function.
// The queued commands will be executed once analytics.js loads.
window.ga = window.ga || function() {
  (ga.q = ga.q || []).push(arguments)
};

// Sets the time (as an integer) this tag was executed.
// Used for timing hits.
ga.l = +new Date;

// Creates a default tracker with automatic cookie domain configuration.
ga('create', 'UA-XXXXX-Y', 'auto');

// Sends a pageview hit from the tracker just created.
ga('send', 'pageview');
</script>

<!-- Sets the `async` attribute to load the script asynchronously. -->
<script async src='//www.google-analytics.com/analytics.js'></script>
<!-- End Google Analytics -->