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HTML em tag

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Horizontal Tabs - World Wide Web …

06/07/2018 · Horizontal Tabs Permitted Context: %text Content Model: Empty! The TAB element can be used when you want fine control over the horizontal positioning.
https://www.w3.org/MarkUp/html3/tabs.html

Elemento HTML - Wikipedia

Un elemento HTML, in informatica, spesso chiamato anche tag HTML, indica una struttura in un documento HTML e un metodo per ordinare gerarchicamente i contenuti.
https://it.wikipedia.org/wiki/Elemento_HTML

HTML5 Reference - World Wide Web …

In both HTML and XHTML, within each tag, whitespace is permitted after the tag name, but it is not permitted before the tag name. Some authors choose to include a space before the slash in the self-closing tag. This practice is based upon a convention that originated within the compatibility guidelines in XHTML 1.0, Appendix C. However ...
https://dev.w3.org/html5/html-author

HTML element - Wikipedia

In the HTML syntax, most elements are written with a start tag and an end tag, with the content in between. An HTML tag is composed of the name of the element, surrounded by angle brackets.
https://en.wikipedia.org/wiki/HTML_element

: The Line Break element - HTML: …

The HTML br element produces a line break in text (carriage-return). It is useful for writing a poem or an address, where the division of lines is significant.
https://developer.mozilla.org/en-US/docs/Web/HTML/Element/br

<em> element definition - Mozilla …

The HTML em element marks text that has stress emphasis. The em element can be nested, with each level of nesting indicating a greater degree of emphasis.
https://developer.mozilla.org/en-US/docs/Web/HTML/Element/em

CSS: em, px, pt, cm, in… - World Wide …

The idea is (1) to not set the font size of the BODY element (in HTML), but use the default size of the device, because that is a size that the reader can comfortably read; and (2) express font sizes of other elements in em: H1 {font-size: 2.5em} to make the H1 2½ times as big as the normal, body font.
http://www.w3.org/Style/Examples/007/units

HTML - Wikipedia

Dopo la dichiarazione del tipo di documento, il documento HTML presenta una struttura ad albero annidato, composta da sezioni delimitate da tag opportuni che al loro interno contengono a loro volta sottosezioni più piccole, sempre delimitate da tag.
https://it.wikipedia.org/wiki/HTML

HTML - Wikipedia

The first tag in such a pair is the start tag, and the second is the end tag (they are also called opening tags and closing tags). Another important component is the HTML document type declaration, which triggers standards mode rendering.
https://en.wikipedia.org/wiki/HTML