Semantics are the most important.
- The structure is more readable.
- Better for SEO.
- Easy for device to parse.
September 21, 2024Less than 1 minute
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- The block elemnts can contain all kinds of elements, include block elements and inline elements.
- The inline elements can only inline elements, the block elements cannot appear in inline elemnts.
- Headers (h1~h6) cannot be nested within each other.
- Tag
pcannot contain block elemnts.
September 21, 2024Less than 1 minute
Version Statement
<!-- HTML 4.01 Strict -->
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<!-- HTML 4.01 Transitional -->
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<!-- HTML 4.01 Frameset -->
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Frameset//EN" "http://www.w3.org/TR/html4/frameset.dtd">
<!-- XHTML 1.0 Strict -->
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<!-- XHTML 1.0 Transitional -->
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<!-- XHTML 1.0 Frameset -->
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Frameset//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-frameset.dtd">
<!-- XHTML 1.1 -->
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
<!--HTML 5声明-->
<!doctype html>September 20, 2024Less than 1 minute