Absolute Positioning with CSS

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In Brief...

When elements are positioned absolutely, they are removed from the normal flow. As a result, they do not affect the positioning of subsequent sibling elements. Learn how to use absolute positioning in the following steps.

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Instructions

  1. Set the position property to absolute.
  2. 
    h1 {
    	position:absolute;
    }
    	
  3. Set one or more "offset" properties.

    The "offset" properties are top, right, bottom, and left. Their values can be specified in number of units (e.g., 10px) or percentage of the containing block (e.g., 20%). These properties offset the element from its nearest non-statically positioned containing block element (i.e., with position set to absolute, relative, or fixed). If it has no ancestor that is non-statically positioned, then it is offset from the browser window.

  4. 
    h1 {
    	position:absolute;
    	top: 70px;
    	left: 50px;
    }
    	
  5. The following example demonstrates absolute positioning:
    <!DOCTYPE HTML>
    <html>
    <head>
    <meta charset="UTF-8">
    <style type="text/css">
    h1 {
    	position:absolute;
    	top:70px;
    	left:50px;
    	border:2px solid #006;
    	padding:1px;
    	background-color:#600;
    	color:#eee;
    }
    #explanation {
    	color:#006;
    	font-weight:bold;
    	font-size:1.2em;
    }
    #wrapper {
    	width:600px;
    	background-color:#def;
    	border:1px solid #006;
    }
    </style>
    <title>CSS Absolute Positioning</title>
    </head>
    <body>
    <div id="wrapper">
    	<h1>CSS Absolute Positioning</h1>
    	<h2>From the Left and the Top</h2>
    	<div id="explanation">
    		<p>Notice how this text is in the upper corner.</p>
    		<p>That's because the preceding h1 element has been absolutely positioned.</p>
    		<p>Positioning an element absolutely takes the element out of the regular flow of the document.</p>
    	</div>
    </div>
    </body>
    </html>
    This code renders the following:
    Absolute Positioning

Author: Chris Minnick

Chris is a prolific author and trainer, and the CEO of WatzThis?. His published books include Writing Computer Code, JavaScript for Kids, Coding with JavaScript For Dummies, Beginning HTML5 and CSS3 For Dummies, Webkit For Dummies, CIW eCommerce Certification Bible, and New Riders' XHTML.

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