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    <p>Browsers use the CSS <code>outline</code> property to show which element has the focus, as you might already know. So, in jQuery, you might use:</p> <pre><code>$(document).ready(function() { $("body").on("mousedown", "*", function(e) { if (($(this).is(":focus") || $(this).is(e.target)) &amp;&amp; $(this).css("outline-style") == "none") { $(this).css("outline", "none").on("blur", function() { $(this).off("blur").css("outline", ""); }); } }); }); </code></pre> <p><strong>Explanation:</strong> This function looks for the <code>mousedown</code> event on any element. This event is <em>delegated</em>, meaning it will apply to elements currently on the page as well as any created dynamically in the future. When the mouse is clicked over the element, its CSS <code>outline</code> property is set to <code>none</code>; the outline is removed.</p> <p>The targeted element gets a new handler for <code>blur</code>. When focus is taken from the element, the <code>outline</code> property is set to a blank string (this removes it from the element's <code>style</code> attribute), allowing the browser to control the outline again. Then, the element removes its own <code>blur</code> handler to free up memory. This way, an element is only outlined when focused from the keyboard.</p> <h2>Edit</h2> <p>Based on Rakesh's comments below, I made a slight change. The function can now detect if there's already an <code>outline</code> set, and will avoid overriding it. <a href="http://jsfiddle.net/RuHNW/3/"><strong>Demo here.</strong></a></p>
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    1. PONo outline on mouse focus but still have outline on keyboard focus?
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    1. COGoing by the code I think if there is some element in my html where I am using outline, this code will remove that forever.
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    2. CODid you test it with the fiddle I posted? Because the `blur` handler takes care of that. When focus is lost on the element, its `outline` is removed by a special feature of jQuery's `css()`. When set to a blank string, the CSS property is removed from the element's `style` attribute, if it's there. Since an element's `style` attribute takes the highest priority, then when the property is removed from there, its `outline` will revert back to wherever it was previously defined.
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    3. COYes, I tried your jsfiddle. See I added one div with default outline. Click on it once and its outline is gone forever. http://jsfiddle.net/RuHNW/1/
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