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HTML5 sub element

The sub element allows you to add a subscript. »video

About sub

is an optional element
multiple sub elements allowed per HTML5 document

Display & subport sub

display in browser »video
display type: inline »example

Parents, children sub

sub nested within elements »sub parents
elements nested within sub »sub children
»examples

Attributes sub

required: none
optional: global attributes, event attributes

Warning

Do not use the sub element for presentation purpose: e.g. _{presentational} purpose.
Use it only when a subscript is actually required: e.g. CO₂ emissions.

Syntax sub

1	<sub> ... </sub> »video

Attributes and Values sub (comma separated)

<sub	attribute	=	"attribute_value(s)"	Video	Examples
1. specific attributes
	All Specific Attributes
2. global attributes
1.	accesskey	=	keyboard key	»img	<sub accesskey="h"> ... </sub>
2.	class	=	class name	»html »img	<sub class="class_name"> ... </sub>
3.	contenteditable	=	"", , true, false	»html	<sub contenteditable="true"> ... </sub>
4.	contextmenu	=	menu id value	»html	<sub contextmenu="menu_id_value"> ... </sub>
5.	data-*	=	value	-	<sub data-http-error="404"> ... </sub>
6.	dir	=	ltr, rtl, auto	»html	<sub dir="ltr"> ... </sub>
7.	draggable	=	true, , false	»img	<sub draggable="false"> ... </sub>
8.	dropzone	=	copy, move, link, string:, file:	-	<sub dropzone="copy"> ... </sub>
9.	hidden	=	"", , hidden	»html »img	<sub hidden="hidden"> ... </sub>
10.	id	=	id name	»html »img	<sub id="unique_id_name"> ... </sub>
11.	itemid	=	URL	-	-
12.	itemprop	=	string	»link »a	-
13.	itemref	=	string	-	-
14.	itemscope	=	"", , itemscope	-	-
15.	itemtype	=	absolute URL	-	-
16.	lang	=	language code	»html »head »title »img	<sub lang="en"> ... </sub>
17.	spellcheck	=	"", , true, false	»html	<sub spellcheck="true"> ... </sub>
18.	style	=	CSS property:value	»html »img	<sub style="color:red"> ... </sub>
19.	tabindex	=	integer	»img	<sub tabindex="3"> ... </sub>
20.	title	=	text	»html »link »style »abbr »dfn »img »meter	<sub title="html page"> ... </sub>
21.	translate	=	"", yes, no	»html »img	<sub translate="yes"> ... </sub>
	All Global Attributes
3. global event attributes
1.	onclick	=	script	» list	<element onclick="script" > ...
2.	ondblclick	=	script	» list	<element ondblclick="script" > ...
	All Event Attributes

Video demonstration sub element

HTML5 sub element: mark up a subscript

min	video details
00:00	video tutorial: sub element
00:04	sub element allows you to add a subscript
00:09	example next
00:24	2 from CO2 represents in this case a subscript

For more information about the sub element, please see the specs: W3C ⁄ WHATWG