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POChrome can't read style.display value
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  1. POChrome can't read style.display value
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    copied!<p>I have a weird problem. I try to write a GreaseMonkey script to be run in Firefox and Google Chrome. With Chrome I tried 2 extensions : "TamperMonkey" and "Blank Canvas Script Handler", mainly because my script check regulary for a new version on an external site and this is considered as cross site scripting and not authorized in Chrome.</p> <p>To show you my problem, I write a simple test case :</p> <pre><code>// ==UserScript== // @name test // @namespace http://fgs.ericc-dream.fr.nf // @description test gm script // @include http://gaia.fallengalaxy.eu/ // @author ericc // @version 0.0.1 // ==/UserScript== /* We attach an event listener to the body tag and trigger the function * 'message' each time that an element is inserted in the page */ var el = document.body; el.addEventListener('DOMNodeInserted', message, false); var extraFlag = false; function message(event) { /* first we capture the id of the new inserted element * (the one who created the event) */ var objId = event.target.id; /* add an event listener on the map container */ if (objId == "extra") { el = document.getElementById('extra'); el.addEventListener('DOMSubtreeModified',readTest,false); GM_log(el.style.display); } } function readTest() { el = document.getElementById('extra'); GM_log(extraFlag); GM_log(el.style.display); if ((el.style.display != 'none') &amp;&amp; (!extraFlag)) { alert('extra'); extraFlag = true; } else if ((el.style.display == 'none')) { extraFlag = false; } } </code></pre> <p>the div element 'extra' is modified by the page. The problem is that Chrome is unable to read the value of el.style.display and thus extraFlag never become 'false' again. I use this flag to avoid to run the code several time, the site is heavily JavaScript driven This code work nicely in Firefox ! </p> <p>I tried to search with Google but can't find a correct answers. Seems easy to change the value of display, but it seems that I'm the only one who try to read it !!!</p> <p>I write this code because "DOMAttrModified" isn't supported in Chrome :-( </p> <p>Thanks in advance for your help </p> <p>ericc</p>
 

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