Posts Tagged ‘ modes ’


Saturday, September 15th, 2007 By Nikhil

Simple speaking (for those who never heard about doctype before today)! DOCTYPE is the declaration in a HTML document that comes before the <HTML> tag, that looks something like this ( pasted from the source of this very page)

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "">

Why use doctype?
It all began when browser standards were introduced by W3C. The earlier web developers implemented CSS according to the wishes of browsers, to have the pages rendered correctly in them and most websites had CSS that didn’t quite match these specifications/standards.

Therefore solution to this problem was to

  • allow web developers who knew their standards to choose which mode to use.
  • continue displaying old pages according to the old (quirks) rules.

And DOCTYPE was born.

So, based on whether you page is designed to standards or not , you choose the appropriate doctype.

Relation between Doctype & Browser modes
Doctype is the statement that tells your browser what mode it should render the HTML page in or rather to be more precise how should the browser interpret the CSS in; Quirks Mode or Strict mode.

Old pages written before these standards were introduced don’t have a doctype. Therefore when there is no DOCTYPE in your HTML then the browser is in QUIRKS mode.
But if the DOCTYPE is defined as one of the following , then the browser is said to be in STRICT Mode.

<!DOCTYPE html PUBLIC “-//W3C//DTD HTML 4.01 Transitional//EN” “”>

get ExpressingIT News by Email Subscribe to ExpressingIT by Email or  Follow Me on Twitter

 Subscribe to ExpressingIT RSS
get ExpressingIT News by Email Subscribe to ExpressingIT by Email
 Follow Me on Twitter