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POgoogle chrome application code injection not working on certain elements
 

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  1. POgoogle chrome application code injection not working on certain elements
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    <p>I've been messing around with packaged chrome applications today to see how much of a website one can manipulate with the code-injection feature.</p> <p>I've been using twitter.com/#!/login as my sandbox because it contains a pretty diverse array of elements.</p> <p>For some reason, the following code does nothing:</p> <pre><code> chrome.tabs.create({url: 'https://twitter.com/#!/login/'}, function (tab) { chrome.tabs.executeScript(tab.id, {code: "jQuery('.main').remove();"}, function() { console.log('code executed'); }); }); </code></pre> <p>It isn't like I can't access the page at all, because this does work:</p> <pre><code> chrome.tabs.create({url: 'https://twitter.com/#!/login/'}, function (tab) { chrome.tabs.executeScript(tab.id, {code: "jQuery('#page-container').remove();"}, function() { console.log('code executed'); }); }); </code></pre> <p>I've loaded jQuery properly in the manifest and have given permissions to all sites as well.</p> <p>In fact, it seems that I can access any element on the page outside the scope of #page-container.</p> <p>Using the Chrome dev-tools console to mess with the page, I can easily use jQuery to access every element (although I recognize that this is whatever version the page is natively using).</p> <p>I noticed something strange in the tag for #page-container:</p> <pre><code>&lt;div id="page-container" class&gt;...&lt;/div&gt; </code></pre> <p>There is a class attribute with no equals sign or value... could this be blocking me?</p> <p>Any thoughts on why I can't get any further into the page with the injected code?</p> <p><strong>EDIT:</strong> Ok, I found a workaround. Storing the value of #page-container and using setInterval to check for a change takes care of the dynamic problem. </p> <p>Just to be clear, there isn't an event handler that can watch for a change in the value of a div, is there? I just feel like using intervals to check for stuff is so old-fashioned these days, even though it is sometimes necessary...</p> <p>Here's the workaround code:</p> <pre><code> chrome.tabs.create({url: 'https://twitter.com/#!/login/'}, function (tab) { chrome.tabs.executeScript(tab.id, {code: "var initial = jQuery('#page-container').html();var interval = setInterval(function(){var final = jQuery('#page-container').html();if(initial !== final){clearInterval(interval);jQuery('.main').remove();}},10);"}, function() { console.log('code executed'); }); }); </code></pre>
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