Margin and Padding of <Body> Tag

Arun Singh picture Arun Singh · Jun 16, 2012 · Viewed 89.1k times · Source

I am writing a very simple HTML code which is listed below. Written in notepad and opening in IE-8 and Firefox (OS: Window Vista).

<html>
<body>
    <table border="1"><tr><td>test</td></tr></table>
</body>
</html>

There is nothing special in the above code, It is creating some space from top left corner.

enter image description here

Which can be easily removed by using the following code

<body style="margin:0; padding:0">

Now i have find out the default margin and padding, which is 4 for Firefox and different for IE-8.

<body style="margin:4; padding:4">

I have some question on this scenario.

  1. Why this value is 4?
  2. From where this value is coming, is it saved somewhere?
  3. Can we modify (configurable) this default value?
  4. How these values are different for browsers?

Thanks.

Answer

Madara&#39;s Ghost picture Madara's Ghost · Jun 16, 2012
  1. First of all, it's probably 4px and not 4. Second, that's just the way the browser vendor decided should be the default.
  2. It is saved in the default browser stylesheets.
  3. You can, but you shouldn't. It differs with each browser. Google it! How do I change default stylesheet on <insert browser here>?
  4. There probably are slight differences, you should be able to tell... by looking at the default stylesheets :)

That difference is one of the main reasons we as designers use a CSS reset, to normalize all of the CSS awkwardness that follows different browser implementations.