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A page may have header and footer elements with data-role of header and footer, respectively. In between, there may be an article element, with a role of main and a class of ui-content. Lastly, a nav element, with data-role of navbar may be present. One HTML document can contain more than one section element, and thus more than one screenful of ...
The end of the header section is indicated by an empty field line, resulting in the transmission of two consecutive CR-LF pairs. In the past, long lines could be folded into multiple lines; continuation lines are indicated by the presence of a space (SP) or horizontal tab (HT) as the first character on the next line.
The <header> element is not a banner landmark when it is a child of any of the following sectioning elements: <article>, <aside>, <main>, <nav>, <section>. [3] <nav> navigation <main> main <aside> complementary <form> form when it has an accessible name using one of the following attributes: aria-labelledby, aria-label, or title. [3] <footer>
The HTML5 <article> element represents a complete composition in a web page or web application that is independently distributable or reusable, e.g. in syndication. This could be a forum post, a magazine or newspaper article, a blog entry, a user-submitted comment, an interactive widget or gadget, or any other independent item of content.
Each Bootstrap component consists of an HTML structure, CSS declarations, and in some cases accompanying JavaScript code. They also extend the functionality of some existing interface elements, including for example an auto-complete function for input fields. Example of a webpage using Bootstrap framework rendered in Firefox
The meta element has two uses: either to emulate the use of an HTTP response header field, or to embed additional metadata within the HTML document. With HTML up to and including HTML 4.01 and XHTML, there were four valid attributes: content, http-equiv, name and scheme. Under HTML 5, charset has been added and scheme has been removed.
The first comprehensive draft of a grid layout for CSS was created by Phil Cupp at Microsoft in 2011 and implemented in Internet Explorer 10 behind a -ms-vendor prefix.The syntax was restructured and further refined through several iterations in the CSS Working Group, led primarily by Elika Etemad and Tab Atkins Jr.
Download QR code; Print/export ... Where other HTML elements such as <p> (paragraph), ... HTML5 introduced several new elements; a few examples include the <header>, ...