The body's border is 1em thick : measurement « Style Basics « HTML / CSS

HTML / CSS » Style Basics » measurement 
The body's border is 1em thick
  

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html>
    <head>
        <title> em measurement </title>
        <style type='text/css' media='all'>
          body {
            border: 1em solid black;
            margin: 0;
            padding: 10px;  
          }       
            div {
                font-size: 24px;
                height: 3em;
                border: 1em solid black;
            }
        </style>
    </head>
    <body>
        This is a test. 
        <div>
            This font is 24 pixels tall and this div is ems tall, 
            which results in a div 72 pixels tall (24 72). Its 
            border is 1em thick, or 24 pixels thick.
        </div>
    </body>
</html>

   
  
Related examples in the same category
1.Absolute Units
2.Relative Units
3.Testing 96 DPI Equals an Inch
4.This paragraph has a 200 pixel width and 10 pixels of padding
5.Relative units giving rise to unequal side margins
6.Different measures
7.em is relative to the font size
8.Relative size font-size: .75em
9.width: size an element by assigning pixels, ems, a percentage, or another fixed measurement to width.
10.Percentages are more flexible because they can scale to the viewport.
11.width:100% stretches an element to the width of its parent.
12.Units of Length and Percentage
13.Absolute vs. Relative Measurements
14.one inch tall
15.inch measurement
16.font-size with various measurements
17.This font is 24 pixels tall and this div is 3 ems tall
18.font-size: 1in
19.inch vs pixel
20.percentage measurement width
21.A negative margin
22.This paragraph has a 1 pixel thick, solid black border around it.
23.Comparing em to Pixels
24.This font is 1.2 smaller than the default size, or pixels.
25.em measurement
26.ex measurement
27.inch measurement 2
28.inch vs pixels
29.Em Measurement Comparison to Pixels
30.percentage measurement
31.12 pixel base
java2s.com  | Contact Us | Privacy Policy
Copyright 2009 - 12 Demo Source and Support. All rights reserved.
All other trademarks are property of their respective owners.