Mark Tag in HTML5

Introduction

The tag was introduced in HTML 5. The HTML tag is used for indicating text as marked or highlighted for reference purposes, due to its relevance in another context. The tag is supported in all major browsers. Use the tag if you want to highlight parts of your text. We can mark the text using many properties from global attributes of html5 e.g. by changing the font, background color, font color, etc. This tag must have opening and closing tag.

Syntax

The syntax of the tag is as.

...

example

Do not forget to buy
milk today.

Attributes

HTML tags can contain one or more attributes. Attributes are added to a tag to provide the browser with more information about how the tag should appear or behave. Attributes consist of a name and a value separated by an equals (=) sign, with the value surrounded by double-quotes.

There are 3 kinds of attributes that you can add to your HTML tags: Element-specific, global, and event handler content attributes. The attributes that you can add to this tag are listed below.

Element-Specific Attributes

The following table shows the attributes that are specific to this tag/element.

Attributes Introduced by HTML5

Attributes	Description
None

Global Attributes

The following attributes are standard across all HTML 5 tags.

HTML5 Global Attributes
accesskey	draggable	style
class	hidden	tabindex
dir	spellcheck
contenteditable	id	title
contextmenu	lang

Event Handler Content Attributes

Here are the standard HTML 5 event handler content attributes.

onabort	onerror*	onmousewheel
onblur*	onfocus*	onpause
oncanplay	onformchange	onplay
oncanplaythrough	onforminput	onplaying
onchange	oninput	onprogress
onclick	oninvalid	onratechange
oncontextmenu	onkeydown	onreadystatechange
ondblclick	onkeypress	onscroll
ondrag	onkeyup	onseeked
ondragend	onload*	onseeking
ondragenter	onloadeddata	onselect
ondragleave	onloadedmetadata	onshow
ondragover	onloadstart	onstalled
ondragstart	onmousedown	onsubmit
ondrop	onmousemove	onsuspend
ondurationchange	onmouseout	ontimeupdate
onemptied	onmouseover	onvolumechange
onended	onmouseup	onwaiting

For example

<!DOCTYPE HTML>
<html>
<body>
The mark tag was introduced in HTML 5.
The HTML mark tag is used for indicating text as marked or highlighted for reference purposes,
due to its relevance in another context. The mark tag is supported in all major browsers. Use the
tag if you want to highlight parts of your text.
HTML tags can contain one or more attributes. Attributes are added to a tag to provide the browser with more information about how the tag should appear or behave.
Attributes consist of a name and a value separated by an equals (=) sign, with the value surrounded by double quotes.
</body>
</html>

FireFox

Differences Between HTML 4.01 and HTML5

The tag is new in HTML5.

Differences from strong and em

Use strong when you need to indicate the importance of a piece of text, such as an error or warning message, and em should be for adding emphasis to text, stressing words to adapt the meaning of a sentence.

mark differs from these two as it is used purely for highlighting the relevance of a piece of text to the user and/or page's content. In the past, you may have used em and strong for this purpose, which was arguably valid at the time due to the lack of a better element, but the introduction of mark simply means their use will be more strict.