Computer help OlympusAndroidAvoiding common mistakes in HTML5 markup. Figure and figcaption Elements - Web Standards Common Element Usage Errors
Avoiding common mistakes in HTML5 markup. Figure and figcaption Elements - Web Standards Common Element Usage Errors
Semantic elements HTML5 readily describe their meaning or purpose for both browsers and web developers. Before the appearance of the HTML5 standard, all page markup was carried out mainly using elements
that have been assigned class classes or id identifiers for clarity of markup (for example,
). They were used to place headers, footers, sidebars, navigation, and more in an HTML document.
The HTML5 standard provided new elements for structuring, grouping content, and marking up textual content. New semantic elements made it possible to improve the structure of the web page, adding semantic meaning to the content enclosed in them (was
, it became ). There are no rules for displaying the appearance of elements, so you can style the elements as you like. All items are available.
According to the HTML5 specification, each element belongs to a certain (zero or more) category. Each of them groups elements with similar characteristics. The following general categories are distinguished:
Meta content
Streaming content
Sectional content
Header content
Text content
Embedded content
Interactive content
Description of HTML5 elements
1. Element
Content categories: streaming content. Groups introductory and navigational elements, optional. May contain headings, wrap page section content, search form, or logo. An HTML document can contain several elements at the same time and they can be located anywhere on the page.
Site description
Element cannot be placed inside elements
2. Element
Content categories: Designed to create a navigation block for a web page or an entire website, without necessarily being inside ... There can be several elements on the page
As elements of the navigation bar, you can use not only list items:
You can also add titles inside the element:
3. Element
Content categories: streaming content, sectional content. Used to group posts - posts, articles, blog posts, comments. It is a self-contained, reusable block, usually starting with a header. May be duplicated on other pages of the site and contain other elements inside that are closely related in content to the content of the external article. If there is only one article on the page with a title and text content, it does not need to be wrapped with an element. ... It is recommended to use an element only if the content of the element will be explicitly indicated in the document schema.
Yesterday I joined the Brooklyn Bird Club for our annual trip to Western New Jersey, specifically Hyper Humus, a relatively recently discovered hot spot.
But does it count for your life list?
Seems you can now go bird watching via the Internet. I haven "t been able to test it out yet (20 user limit apparently) but this is certainly cool. Personally, I can" t imagine it replacing actually being out in the field by any small amount.
4. Element
Content categories: streaming content, sectional content. An element represents a generic section of a document. Groups related content and usually contains a title. It is not a wrapper block, for these purposes it is more appropriate to use the element
... The content can be a table of contents, sections of scientific publications, an event program. Homepage The site can also be divided into sections - a block of introductory information, news and contacts. It is recommended to use an element only if the content of the element will be explicitly indicated in the document schema.
...
...
...
inside
You can create parent elements with nested elements which have one or more elements ... Not all pages need to be arranged this way, but this is a valid way to nest elements. For example, the main content area of the page contains two blocks with articles of different topics. You can emphasize this by placing each article of the same topic inside an element.
Notes on nature
...
...
Historical notes
...
...
5th element
Content categories: streaming content, sectional content. Groups content that is directly related to the surrounding content, but that can be considered separate (i.e. removing this block will not affect the understanding of the main content)... Most often, an element is positioned as a sidebar (like in books) and includes a group of elements:
6. Element
Content categories: streaming content. Represents the footer of the containing section or root element. Usually contains information about the author of the article, information about the copyright, etc. When used as a footer for an entire page, content is supplemented with copyright information, links to terms of use, contact information, links to related content, and the like.
There can be several elements in one web document
7. Element
Content categories: streaming content. Used to identify the contact information for the author / owner of a document or article. To indicate the author of the document, the tag is placed inside the element
, to display the author of the article - inside the tag ... Usually displayed in the browser in italics.
8. Element
Content categories: streaming content. Element represents the main content of the document (the content of the element ). The content inside the element must be unique and not repeated in all site documents, such as navigation links, copyright information, logos, search forms (in case the search form is the main function of the document).
Element cannot be a descendant of elements such as ,
Poodle
About breed
9. Element
Content categories: streaming content, root sectional content. Element represents standalone content (optionally with a title) being independent element main thread. An element can be moved from the main content of a document to a side column or an application without affecting the flow of the document. Using the element can add brief characteristics to illustrations, photographs, diagrams, code snippets, etc.
Autumn forest
Element is block, in width it occupies the entire width of the container block minus margins margin:
10. Element
Element - a descendant of an element does not belong to any content category. The element is a block element, the width is equal to the width of the element , the default height is 18px.
11. Element
Content categories: Defines the time (24 hours) or the date according to the Gregorian calendar with the possible indication of the time and time zone offset. The text enclosed in this tag is not styled by the browser. The datetime attribute is available for the tag, the content of which specifies what the user will see on his computer screen:
For the date to be read automatically, it must be in the format YYYY-MM-DD. The time, which can also be specified, is specified in the format HH: MM with the addition of the separating prefix T (time):
12. Element
Content categories: streaming content, text content. Text placed inside a tag , is highlighted in yellow by default (the background color and font color in the selected block can be changed by setting certain css styles). With this tag, you can mark important content as well as keywords.
13. Element
Content categories: streaming content, text content. Separates a piece of text that should be isolated from the rest of the text for bidirectional text formatting. Used for texts written simultaneously in languages read from left to right and from right to left.
14. Element
Content categories: streaming content, text content. Single tag, shows the browser a place to add a long line break if needed.
15. Elements for describing East Asian symbols
Content categories: streaming content, text content. Element allows you to mark one or more elements of the text content category using ruby annotation. Ruby annotation is used primarily in East Asian typography as a pronunciation guide or to include other characteristics. An element can contain: - one or more text nodes or elements ; - one or more elements
The elements ,
Element defines the enclosed text as the base annotation component. Element
In common print media such as books and magazines, pictures, tables, or code examples are usually signed. Until now, we have not had the opportunity to semantically extract this type of content directly into HTML, instead of resorting to CSS class names. HTML5 hopes to fix this problem with new elements: and ... Let's figure it out!
Element
It is assumed that the element will be used in combination with the element to highlight diagrams, illustrations, photographs, and code examples (among other things). Here's what it says about in the specification:
Element is a piece of independent content, not necessarily signed, which generally refers to individual element from the main content of the document, and can be removed from the document without prejudice to its meaning.
Element
Element is optional and may appear before or after content inside ... Only one item can be placed in although the element itself can contain multiple children (e.g. or ).
Usage and
So, we learned what the specification says about these elements. How do you use them? Let's take a look at this with examples.
for image
Image in element without a signature:
Here's the code for that:
with picture and signature
Image inside element with an explanatory signature:
Impudent macaque from Borneo. Photo by Richard Clarke
And the code we used:
Impudent macaque from Borneo. Photo by Richard Clarke
with multiple images
Placing multiple images inside one element with a common signature:
From left to right: kookabara, pelican and multicolor lorikeet. Photos by Richard Clarke
And the code itself:
From left to right: kookabara, pelican and multicolor lorikeet. Photos by Richard Clarke
with code block
Element can also be used for code examples:
Creative Commons Attribution Share-alike license
Using an element around the link to the Creative Commons license with rel = "license".
Below is the code for this:
Creative Commons Attribution Share-alike license
Using an element around the Creative Commons license link with rel = "license".
Difference between and
We already talked about the element
If the content is just relevant and not essential, then use
If the content is important, but its position in the shared content flow is not that important, the element is used. .
Note that if the position of the content in the text is closely related to the previous and subsequent content, then more appropriate elements should be used - for example,
Impudent macaque from Borneo. Photo by Richard Clarke 
From left to right: kookabara, pelican and multicolor lorikeet. Photos by Richard Clarke 
