I have very basic question. I don't know this question makes any sense or not. I don't know the reason why we need DOCTYPE to the HTML/JSP pages also.
The pages will work Without DOCTYPE also.
+1
A:
See http://www.quirksmode.org/css/quirksmode.html for the full discussion; in short, doctype is supposed to trigger quirks/strict mode of page rendering and behavior.
Unfortunately, people started throwing in doctypes without knowing what they do, thereby lessening their usefullness.
Piskvor
2010-06-30 09:06:43
+4
A:
Zeldman wrote
Per HTML and XHTML standards, a DOCTYPE (short for “document type declaration”) informs the validator which version of (X)HTML you’re using, and must appear at the very top of every web page. DOCTYPEs are a key component of compliant web pages: your markup and CSS won’t validate without them.
and Take a look at 24 Ways Article "Transitional vs. Strict Markup"
at coming HTML 5 , you'll only need to declare
<!DOCTYPE HTML>
mgpyone
2010-06-30 09:19:20
+1
A:
Escpecially Microsoft IE has a major problem with certain doctypes or a complete lack of doctype. At the bottom of this page you can find a concise overview of browser behaviour in combination with certain doctypes. There are three standard behaviours:
- Q - Quirksmode. You really don't want to have that. It triggers box model bug in IE. The CSS
widthandheightthen incorrectly covers thepaddingandborder. - A - Almost standards mode. Affordable, only vertical sizing of table cells is not as per CSS2 spec. Useful if you want to avoid mysterious gaps of images in table cells.
- S - Standards mode. Browser tries to be fully w3 HTML/CSS standard compliant. Preferred mode since it's the only mode you can be less or more certain that your website will look exactly the same in all browsers.
Here's a piece of HTML which demonstrates the box model bug in IE. Copy'n'paste'n'run it. With <!DOCTYPE html> present, you'll see a rectangle. Without the doctype line you'll see a genuine square.
<!DOCTYPE html>
<html lang="en">
<head>
<title>Remove DOCTYPE to trigger quirksmode</title>
<style>
#box {
background: yellow;
width: 100px;
padding: 20px;
border: 20px solid black;
margin: 20px;
}
</style>
</head>
<body>
<div id="box">box</div>
</body>
</html>
The influence of this IE bug is the most noticeable when you want a "pixelperfect" webdesign.
BalusC
2010-06-30 11:21:40