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|
<!DOCTYPE html><!-- This page is a placeholder for generated extensions api doc. Note:
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You must omit this parameter in earlier versions,
and you may omit it in any version. If you require this
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<td valign="middle" width="100%" style="padding-left:0.6em;">
<form action="http://www.google.com/cse" id="cse" style="margin-top:0.5em">
<div id="gsc-search-box">
<input type="hidden" name="cx" value="002967670403910741006:61_cvzfqtno">
<input type="hidden" name="ie" value="UTF-8">
<input type="text" name="q" value="" size="55">
<input class="gsc-search-button" type="submit" name="sa" value="Search">
<br>
<span class="greytext">e.g. "page action" or "tabs"</span>
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<script type="text/javascript" src="http://www.google.com/jsapi"></script>
<script type="text/javascript">google.load("elements", "1", {packages: "transliteration"});</script>
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<div class="g-unit" id="gc-pagecontent">
<div id="pageTitle">
<h1 class="page_title">Tutorial: Google Analytics</h1>
</div>
<!-- TABLE OF CONTENTS -->
<div id="toc">
<h2>Contents</h2>
<ol>
<li>
<a href="#toc-requirements">Requirements</a>
<ol>
<li style="display: none; ">
<a>h3Name</a>
</li>
</ol>
</li><li>
<a href="#toc-installing">Installing the tracking code</a>
<ol>
<li style="display: none; ">
<a>h3Name</a>
</li>
</ol>
</li><li>
<a href="#toc-tracking-pageviews">Tracking page views</a>
<ol>
<li style="display: none; ">
<a>h3Name</a>
</li>
</ol>
</li><li>
<a href="#toc-debugging">Monitoring analytics requests</a>
<ol>
<li style="display: none; ">
<a>h3Name</a>
</li>
</ol>
</li><li>
<a href="#toc-tracking-events">Tracking events</a>
<ol>
<li style="display: none; ">
<a>h3Name</a>
</li>
</ol>
</li><li>
<a href="#toc-samplecode">Sample code</a>
<ol>
<li style="display: none; ">
<a>h3Name</a>
</li>
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<a href="#apiReference">API reference</a>
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<a href="#properties">Properties</a>
<ol>
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<a href="#property-anchor">propertyName</a>
</li>
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<a href="#methods">Methods</a>
<ol>
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<a href="#method-anchor">methodName</a>
</li>
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<a href="#events">Events</a>
<ol>
<li>
<a href="#event-anchor">eventName</a>
</li>
</ol>
</li>
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<a href="#types">Types</a>
<ol>
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<a href="#id-anchor">id</a>
</li>
</ol>
</li>
</ol>
</li>
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</div>
<!-- /TABLE OF CONTENTS -->
<!-- Standard content lead-in for experimental API pages -->
<p id="classSummary" style="display: none; ">
For information on how to use experimental APIs, see the <a href="experimental.html">chrome.experimental.* APIs</a> page.
</p>
<!-- STATIC CONTENT PLACEHOLDER -->
<div id="static"><div id="pageData-name" class="pageData">Tutorial: Google Analytics</div>
<div id="pageData-showTOC" class="pageData">true</div>
<p>This tutorial demonstrates using Google Analytics to track the usage of your
extension.</p>
<h2 id="toc-requirements">Requirements</h2>
<p>
This tutorial expects that you have some familiarity writing extensions for
Google Chrome. If you need information on how to write an extension, please
read the <a href="gettingstarted.html">Getting Started tutorial</a>.
</p>
<p>
You will also need a <a href="http://www.google.com/analytics">Google
Analytics account</a> set up to track your extension. Note that when setting
up the account, you can use any value in the Website's URL field, as your
extension will not have an URL of its own.
</p>
<p style="text-align: center">
<img src="images/tut_analytics/screenshot01.png" style="width:400px;height:82px;" alt="The analytics setup with info for a chrome extension filled out.">
</p>
<p>
Also note that Google Analytics requires version <strong>4.0.302.2</strong>
of Google Chrome to work correctly. Users with an earlier version of Google
Chrome will not show up on your Google Analytics reports. View
<a href="faq.html#faq-dev-14">this FAQ entry</a> to learn how to check which
version of Google Chrome is deployed to which platform.
</p>
<h2 id="toc-installing">Installing the tracking code</h2>
<p>
The standard Google Analytics tracking code snippet fetches a file named
<code>ga.js</code> from an SSL protected URL if the current page
was loaded using the <code>https://</code> protocol. <strong>It is strongly
advised to use the SSL protected ga.js in an extension</strong>,
but Google Chrome extension
pages are hosted under <code>chrome-extension://</code> URLs, so the tracking
snippet must be modified slightly to pull <code>ga.js</code> directly from
<code>https://ssl.google-analytics.com/ga.js</code> instead of the default
location.
</p>
<p>
Below is a modified snippet for the
<a href="http://code.google.com/apis/analytics/docs/tracking/asyncTracking.html">asynchronous
tracking API</a> (the modified line is bolded):
</p>
<pre>(function() {
var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true;
<strong>ga.src = 'https://ssl.google-analytics.com/ga.js';</strong>
var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s);
})();
</pre>
<p>
Here is a background page which loads the asynchronous tracking code and
tracks a single page view:
</p>
<pre><!DOCTYPE html>
<html>
<head>
...
</head>
<body>
<script>
var _gaq = _gaq || [];
_gaq.push(['_setAccount', 'UA-XXXXXXXX-X']);
_gaq.push(['_trackPageview']);
(function() {
var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true;
ga.src = 'https://ssl.google-analytics.com/ga.js';
var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s);
})();
</script>
...
</body>
</html>
</pre>
<p>
Keep in mind that the string <code>UA-XXXXXXXX-X</code> should be replaced
with your own Google Analytics account number.
</p>
<h2 id="toc-tracking-pageviews">Tracking page views</h2>
<p>
The <code>_gaq.push(['_trackPageview']);</code> code will track a single
page view. This code may be used on any page in your extension. When
placed on a background page, it will register a view once per browser
session. When placed on a popup, it will register a view once every time
the popup is opened.
</p>
<p>
By looking at the page view data for each page in your extension, you can
get an idea of how many times your users interact with your extension per
browser session:
</p>
<p style="text-align: center">
<img src="images/tut_analytics/screenshot02.png" style="width:300px;height:119px;" alt="Analytics view of the top content for a site.">
</p>
<h2 id="toc-debugging">Monitoring analytics requests</h2>
<p>
To ensure that tracking data from your extension is being sent to Google
Analytics, you can inspect the pages of your extension in the
Developer Tools window (see the
<a href="tut_debugging.html">debugging tutorial</a> for more information).
As the following figure shows, you should see requests for a file named
<strong>__utm.gif</strong> if everything is set up correctly.
</p>
<p style="text-align: center">
<img src="images/tut_analytics/screenshot04.png" style="width:683px;height:418px;" alt="Developer Tools window showing the __utm.gif request">
</p>
<h2 id="toc-tracking-events">Tracking events</h2>
<p>
By configuring event tracking, you can determine which parts of your
extension your users interact with the most. For example, if you have
three buttons users may click:
</p>
<pre> <button>Button 1</button>
<button>Button 2</button>
<button>Button 3</button>
</pre>
<p>
Write a function that sends click events to Google Analytics:
</p>
<pre> function trackButton(button_id) {
_gaq.push(['_trackEvent', 'button' + button_id, 'clicked']);
};
</pre>
<p>
And call it when each button is pressed:
</p>
<pre> <button onclick="trackButton(1);">Button 1</button>
<button onclick="trackButton(2);">Button 2</button>
<button onclick="trackButton(3);">Button 3</button>
</pre>
<p>
The Google Analytics event tracking overview page will give you metrics
regarding how many times each individual button is clicked:
</p>
<p style="text-align: center">
<img src="images/tut_analytics/screenshot03.png" style="width:300px;height:482px;" alt="Analytics view of the event tracking data for a site.">
</p>
<p>
By using this approach, you can see which parts of your extension are
under-or-overutilized. This information can help guide decisions about UI
redesigns or additional functionality to implement.
</p>
<p>
For more information about using the event tracking API, see the
Google Analytics
<a href="http://code.google.com/apis/analytics/docs/tracking/eventTrackerOverview.html]">developer
documentation</a>.
</p>
<h2 id="toc-samplecode">Sample code</h2>
<p>
A sample extension that uses these techniques is
available in the Chromium source tree:
</p>
<blockquote>
<a href="http://src.chromium.org/viewvc/chrome/trunk/src/chrome/common/extensions/docs/examples/tutorials/analytics/">.../examples/tutorials/analytics/</a>
</blockquote>
<p></p>
</div>
<!-- API PAGE -->
<div class="apiPage" style="display: none; ">
<a name="apiReference"></a>
<h2>API reference: chrome.apiname </h2>
<!-- PROPERTIES -->
<div class="apiGroup">
<a name="properties"></a>
<h3 id="properties">Properties</h3>
<div>
<a></a>
<h4>getLastError</h4>
<div class="summary">
<!-- Note: intentionally longer 80 columns -->
<span>chrome.extension</span><span>lastError</span>
</div>
<div>
</div>
</div>
</div> <!-- /apiGroup -->
<!-- METHODS -->
<div class="apiGroup" id="methods">
<a name="methods"></a>
<h3>Methods</h3>
<!-- iterates over all functions -->
<div class="apiItem">
<a></a> <!-- method-anchor -->
<h4>method name</h4>
<div class="summary"><span>void</span>
<!-- Note: intentionally longer 80 columns -->
<span>chrome.module.methodName</span>(<span><span>, </span><span></span>
<var><span></span></var></span>)</div>
<div class="description">
<p class="todo">Undocumented.</p>
<p>
A description from the json schema def of the function goes here.
</p>
<!-- PARAMETERS -->
<h4>Parameters</h4>
<dl>
<div>
<div>
</div>
</div>
</dl>
<!-- RETURNS -->
<h4>Returns</h4>
<dl>
<div>
<div>
</div>
</div>
</dl>
<!-- CALLBACK -->
<div>
<div>
<h4>Callback function</h4>
<p>
The callback <em>parameter</em> should specify a function
that looks like this:
</p>
<p>
If you specify the <em>callback</em> parameter, it should
specify a function that looks like this:
</p>
<!-- Note: intentionally longer 80 columns -->
<pre>function(<span>Type param1, Type param2</span>) <span class="subdued">{...}</span>;</pre>
<dl>
<div>
<div>
</div>
</div>
</dl>
</div>
</div>
<!-- MIN_VERSION -->
<p>
This function was added in version <b><span></span></b>.
If you require this function, the manifest key
<a href="manifest.html#minimum_chrome_version">minimum_chrome_version</a>
can ensure that your extension won't be run in an earlier browser version.
</p>
</div> <!-- /description -->
</div> <!-- /apiItem -->
</div> <!-- /apiGroup -->
<!-- EVENTS -->
<div class="apiGroup">
<a name="events"></a>
<h3 id="events">Events</h3>
<!-- iterates over all events -->
<div class="apiItem">
<a></a>
<h4>event name</h4>
<div class="summary">
<!-- Note: intentionally longer 80 columns -->
<span class="subdued">chrome.bookmarks</span><span>onEvent</span><span class="subdued">.addListener</span>(function(<span>Type param1, Type param2</span>) <span class="subdued">{...}</span>);
</div>
<div class="description">
<p class="todo">Undocumented.</p>
<p>
A description from the json schema def of the event goes here.
</p>
<!-- PARAMETERS -->
<h4>Parameters</h4>
<dl>
<div>
<div>
</div>
</div>
</dl>
</div> <!-- /decription -->
</div> <!-- /apiItem -->
</div> <!-- /apiGroup -->
<!-- TYPES -->
<div class="apiGroup">
<a name="types"></a>
<h3 id="types">Types</h3>
<!-- iterates over all types -->
<div class="apiItem">
<a></a>
<h4>type name</h4>
<div>
</div>
</div> <!-- /apiItem -->
</div> <!-- /apiGroup -->
</div> <!-- /apiPage -->
</div> <!-- /gc-pagecontent -->
</div> <!-- /g-section -->
</div> <!-- /codesiteContent -->
<div id="gc-footer" --="">
<div class="text">
<p>
Except as otherwise <a href="http://code.google.com/policies.html#restrictions">noted</a>,
the content of this page is licensed under the <a rel="license" href="http://creativecommons.org/licenses/by/3.0/">Creative Commons
Attribution 3.0 License</a>, and code samples are licensed under the
<a rel="license" href="http://code.google.com/google_bsd_license.html">BSD License</a>.
</p>
<p>
©2010 Google
</p>
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