+ 9
Is !doctype declaration optional
Please I want to know if the !doctype declaration in html is optional or not
11 Respostas
+ 14
Well usually it is mandatory, because it’s a declaration for saying it’s a html document.
+ 13
The doctype declaration should be the very first thing in an HTML document, before the tag. The doctype declaration is not an HTMLtag; it is an instruction to the web browser about what version of the markup language the page is written in. The doctype declaration refers to a Document Type Definition (DTD).
But the most important thing is that with most families of browsers, a doctype declaration will make a lot of guessing unnecessary, and will thus trigger a "standard" rendering mode.
Not including it will make the browser just try to parse HTML as best it can. But not all elements will be displayed correctly .DOCTYPE is a required part of all HTML documents
+ 8
It's optional, but if your code contains html 5 codes, you need to add !doctype to tell the browser that you are coding in html 5 if not, the html 5 codes won't work properly because the browser will assume that you are coding in html 4.
+ 6
it is optional depending on your HTML version if you don't use it your webpage would rather be a html4 webpage
+ 6
Common DOCTYPE Declarations
HTML 5
<!DOCTYPE html>
HTML 4.01 Strict
This DTD contains all HTML elements and attributes, but does NOT INCLUDE presentational or deprecated elements (like font). Framesets are not allowed.
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
HTML 4.01 Transitional
This DTD contains all HTML elements and attributes, INCLUDING presentational and deprecated elements (like font). Framesets are not allowed.
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
HTML 4.01 Frameset
This DTD is equal to HTML 4.01 Transitional, but allows the use of frameset content.
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Frameset//EN" "http://www.w3.org/TR/html4/frameset.dtd">
+ 6
Its optional but it means u are working with html2 ... But if u want to use html5 u must use !doctype
+ 5
XHTML 1.0 Strict
This DTD contains all HTML elements and attributes, but does NOT INCLUDE presentational or deprecated elements (like font). Framesets are not allowed. The markup must also be written as well-formed XML.
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
XHTML 1.0 Transitional
This DTD contains all HTML elements and attributes, INCLUDING presentational and deprecated elements (like font). Framesets are not allowed. The markup must also be written as well-formed XML.
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
XHTML 1.0 Frameset
This DTD is equal to XHTML 1.0 Transitional, but allows the use of frameset content.
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Frameset//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-frameset.dtd">
+ 5
XHTML 1.1
This DTD is equal to XHTML 1.0 Strict, but allows you to add modules (for example to provide Ruby support for East-Asian languages).
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
+ 4
This is list of HTML declarations
+ 4
You must use it to use html5
+ 4
Thanks for your answers
Costuma ter perguntas como essa?
Aprenda de maneira mais eficiente, de graça:
Quente hoje
Sticky position
3 Votes
Help please?
3 Votes
Ejercicio Pytho
0 Votes
Online voting system
2 Votes
What is that z for
0 Votes
Suggestions needed
4 Votes