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POCrossbrowser method to cancel a drop event in a content edittable div
 

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    <p>I want to be able to dissalow images (and other stuff) from being dropped into a content editable div across browsers. I see how to do it for Chrome and IE. Firefox stubbornly refuses. The code snippet at <a href="http://jsbin.com/oqozo3" rel="nofollow noreferrer">http://jsbin.com/oqozo3</a> has an example which shows that the event is firing, I am canceling it, and in FF the image still appears. </p> <p>Basically, The following fails to work in FF</p> <pre><code>&lt;!DOCTYPE html&gt; &lt;html&gt; &lt;head&gt; &lt;meta charset="utf-8"&gt; &lt;title&gt;ContentEditable fails in FF&lt;/title&gt; &lt;script type="text/javascript"&gt; function init() { var target = document.getElementById("target"); if (target.addEventListener) { target.addEventListener ("dragenter", all, false); target.addEventListener ("dragover", all, false); target.addEventListener ("drop", all, false); target.addEventListener ("dragdrop", all, false); } else { target.attachEvent ("ondragenter", all, false); target.attachEvent ("ondragover", all, false); target.attachEvent ("ondrop", all, false); } } function all(event) { if (event.preventDefault) { event.preventDefault();} return false; } &lt;/script&gt; &lt;/head&gt; &lt;body onLoad="init();"&gt; &lt;div id="target" style="border: 1px solid black; height: 100px;" contenteditable="true"&gt;This is editable content&lt;/div&gt; &lt;div&gt; &lt;p&gt;I don't want the image to be draggable to the above div. Works in IE, Chrome, not firefox.&lt;/p&gt; &lt;img src="http://mozcom-cdn.mozilla.net/img/firefox-100.jpg"&gt; &lt;/div&gt; &lt;/body&gt; &lt;/html&gt; </code></pre> <p>I have already looked at: <a href="https://stackoverflow.com/questions/3033130/contenteditable-div-disabling-drag-and-drop">ContentEditable DIV - disabling drag and drop</a>, but the suggestions there also don't work in firefox.</p>
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