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Discards attributes not on a whitelist for the given element. Turns broken or invalid entities into plaintext. Double-quotes all attribute values. Attributes without values are given the name as value. Double attributes are discarded. Unsafe style attributes are discarded. Prepends space if there are attributes.
Where element names the HTML element type, and attribute is the name of the attribute, set to the provided value. The value may be enclosed in single or double quotes, although values consisting of certain characters can be left unquoted in HTML (but not XHTML). [2] [3] Leaving attribute values unquoted is considered unsafe. [4]
The text between < html > and </ html > describes the web page, and the text between < body > and </ body > is the visible page content. The markup text < title > This is a title </ title > defines the browser page title shown on browser tabs and window titles and the tag < div > defines a division of the page used for easy styling.
In no case should the resulting font size of any text drop below 85% of the page's default font size. The HTML <small>...</small> tag has a semantic meaning of fine print or side comments; [2] do not use it for stylistic changes. For use of small text for authority names with binomials, see § Scientific names.
An HTML document is composed of a tree of simple HTML nodes, such as text nodes, and HTML elements, which add semantics and formatting to parts of a document (e.g., make text bold, organize it into paragraphs, lists and tables, or embed hyperlinks and images). Each element can have HTML attributes specified. Elements can also have content ...
In SGML, HTML and XML documents, the logical constructs known as character data and attribute values consist of sequences of characters, in which each character can manifest directly (representing itself), or can be represented by a series of characters called a character reference, of which there are two types: a numeric character reference and a character entity reference.
An HTML attribute name can be made variable. HTML Tidy – an outdated HTML4 library that is slated for removal – has historically removed attributes with invalid names at the server side, so the result does not depend on a browser capability to ignore invalid attribute names, and the amount of data sent is reduced.
Adds the "role" attribute with the provided value to the HTML code. Suggested values math presentation none note: String: optional: HTML class(es) class: Name(s) of the class(es), separated by spaces, to be added to the HTML "class" attribute. String: optional: CSS formatting markup: style: CSS directives for formatting the text. Added to the ...