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POWhy can't this simple javascript/jquery code alert selected text?
 

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  1. POWhy can't this simple javascript/jquery code alert selected text?
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    <p>I can't explain the behaviour of the code below. Here's my entire script</p> <pre><code>&lt;html&gt; &lt;head&gt; &lt;script type="text/javascript" language="javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/1.6.1/jquery.min.js"&gt;&lt;/script&gt; &lt;script type="text/javascript" language="javascript"&gt; var tmpText = ''; $(document).ready(function(){ tmpText = ''; $('#btn_bold').click(function(){alert(tmpText);}); $('textarea').bind('mouseup', function(){ tmpText = ''; if(window.getSelection){ tmpText = window.getSelection(); }else if(document.getSelection){ tmpText = document.getSelection(); }else if(document.selection){ tmpText = document.selection.createRange().text; } //tmpText = 'hello world'; alert(tmpText); }); }); &lt;/script&gt; &lt;/head&gt; &lt;body&gt; &lt;button type="button" id="btn_bold"&gt;click&lt;/button&gt; &lt;textarea&gt;This is some text&lt;/textarea&gt; &lt;/body&gt; &lt;/html&gt; </code></pre> <p>Try the following operations:</p> <p>1) Use your mouse to high light text in the text area. You will notice that javascript alerts you the selected text.</p> <p>2) Press the click button. You will notice javascript will alert you an empty string.</p> <p>No uncomment <code>tmpText = 'hello world';</code> and repeat the above steps. This time, you'll notice both steps 1) and 2) alerts you "hello world".</p> <p>How come in the first experiment, step 2) does not alert you the same text as step 1)?</p> <p><strong>I am testing in google chrome</strong></p>
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