HTML Attribute Reference

There are few HTML attributes which are standard and associated to all the HTML tags. These attributes are listed here with a brief description.

Global Attributes

Not valid in base, head, html, meta, param, script, style, and title elements.

Attribute	HTML-5	Description
accesskey		Specifies a shortcut key for an element to be used in place of keyboard.
class		The class of the element
contenteditable	Yes	Specify whether the element is editable or not.
contextmenu	Yes	Specifies a context menu for an element.
data-*	Yes	Used to store custom data associated with the element.
draggable	Yes	Boolean attribute to specify whether the element can be dragged or not.
dropzone	Yes	Specifies whether the dragged data is copied, moved, or linked, when dropped.
hidden	Yes	Specifies whether element should be visible or not.
id		A unique id for the element
spellcheck	Yes	Specifies if the element must have it's spelling or grammar checked.
style		An inline style definition
tabindex		Specifies the tab order of an element.
title		A text to display in a tool tip
translate	Yes	Boolean attribute specifies whether the content of an element should be translated or not

Language Attributes

The lang attribute indicates the language being used for the enclosed content. The language is identified using the ISO standard language abbreviations, such as fr for French, en for English, and so on. RFC 1766 (https://www.ietf.org/rfc/rfc1766.txt) describes these codes and their formats.
Not valid in base, br, frame, frameset, hr, iframe, param, and script elements.

Attribute	Value	Description
dir	ltr | rtl	Sets the text direction
lang	language_code	Sets the language code