Тег IMG, атрибут align

Атрибут align

Для изображений можно указывать их положение относительно текста или других изображений на веб-странице. Способ выравнивания изображений задается атрибутом align тега .

Синтаксис

Значения

В табл. 1 перечислены возможные значение атрибута align и результат его использования.

Табл. 1. Использование значений атрибута align

Значение	Описание	Пример
bottom	Выравнивание нижней границы изображения по окружающему тексту..	Lorem ipsum dolor sit amet, consectetuer adipiscing elit.
left	Выравнивает изображение по левому краю окна.	Lorem ipsum dolor sit amet, consectetuer adipiscing elit.
middle	Выравнивание середины изображения по базовой линии текущей строки.	Lorem ipsum dolor sit amet, consectetuer adipiscing elit.
right	Выравнивает изображение по правому краю окна.	Lorem ipsum dolor sit amet, consectetuer adipiscing elit.
top	Верхняя граница изображения выравнивается по самому высокому элементу текущей строки.	Lorem ipsum dolor sit amet, consectetuer adipiscing elit.

Наиболее популярные значения — left и right , создающие обтекание текста вокруг изображения.

Значение по умолчанию

Валидация

Использование этого атрибута осуждается спецификацией HTML, валидный код получается только при использовании переходного .

      
  Этот текст обтекает рисунок по его левому краю.
  

Примечание

Дополнительные значения absbottom , absmiddle , baseline и texttop понимаются браузерами, но не поддерживаются спецификацией HTML 4.x/XHTML 1.0.

Не выкладывайте свой код напрямую в комментариях, он отображается некорректно. Воспользуйтесь сервисом cssdeck.com или jsfiddle.net, сохраните код и в комментариях дайте на него ссылку. Так и результат сразу увидят.

Типы тегов

HTML5

Блочные элементы

Строчные элементы

Универсальные элементы

Нестандартные теги

Осуждаемые теги

Видео

Документ

Звук

Изображения

Объекты

Скрипты

Списки

Ссылки

Таблицы

Текст

Форматирование

Формы

Фреймы

Источник

HTML Tag

The tag is used to embed an image in an HTML page.

Images are not technically inserted into a web page; images are linked to web pages. The tag creates a holding space for the referenced image.

The tag has two required attributes:

• src — Specifies the path to the image
• alt — Specifies an alternate text for the image, if the image for some reason cannot be displayed

Note: Also, always specify the width and height of an image. If width and height are not specified, the page might flicker while the image loads.

Tip: To link an image to another document, simply nest the tag inside an tag (see example below).

Browser Support

Attributes

Attribute	Value	Description
alt	text	Specifies an alternate text for an image
crossorigin	anonymous use-credentials	Allow images from third-party sites that allow cross-origin access to be used with canvas
height	pixels	Specifies the height of an image
ismap	ismap	Specifies an image as a server-side image map
loading	eager lazy	Specifies whether a browser should load an image immediately or to defer loading of images until some conditions are met
longdesc	URL	Specifies a URL to a detailed description of an image
referrerpolicy	no-referrer no-referrer-when-downgrade origin origin-when-cross-origin unsafe-url	Specifies which referrer information to use when fetching an image
sizes	sizes	Specifies image sizes for different page layouts
src	URL	Specifies the path to the image
srcset	URL-list	Specifies a list of image files to use in different situations
usemap	#mapname	Specifies an image as a client-side image map
width	pixels	Specifies the width of an image

Источник

How to Center an Image Vertically and Horizontally with CSS

Cem Eygi

Many developers struggle while working with images. Handling responsiveness and alignment is particularly tough, especially centering an image in the middle of the page.

So in this post, I will be showing some of the most common ways to center an image both vertically and horizontally using different CSS properties.

Here’s an interactive scrim about how to center an image vertically and horizontally:

I’ve gone over the CSS Position and Display properties in my previous post. If you’re not familiar with those properties, I recommend checking out those posts before reading this article.

Here’s a video version if you want to check it out:

Centering an Image Horizontally

Let’s begin with centering an image horizontally by using 3 different CSS properties.

Text-Align

The first way to center an image horizontally is using the text-align property. However, this method only works if the image is inside a block-level container such as a :

Margin: Auto

Another way to center an image is by using the margin: auto property (for left-margin and right-margin).

However, using margin: auto alone will not work for images. If you need to use margin: auto , there are 2 additional properties you must use as well.

The margin-auto property does not have any effects on inline-level elements. Since the tag is an inline element, we need to convert it to a block-level element first:

Secondly, we also need to define a width. So the left and right margins can take the rest of the empty space and auto-align themselves, which does the trick (unless we give it a width of 100%):

Display: Flex

The third way to center an image horizontally is by using display: flex . Just like we used the text-align property for a container, we use display: flex for a container as well.

However, using display: flex alone will not be enough. The container must also have an additional property called justify-content :

The justify-content property works together with display: flex , which we can use to center the image horizontally.

Finally, the width of the image must be smaller than the width of the container, otherwise, it takes 100% of the space and then we can’t center it.

Important: The display: flex property is not supported in older versions of browsers. See here for more details.

Centering an Image Vertically

Display: Flex

For vertical alignment, using display: flex is again really helpful.

Consider a case where our container has a height of 800px, but the height of the image is only 500px:

Now, in this case, adding a single line of code to the container, align-items: center , does the trick:

The align-items property can position elements vertically if used together with display: flex .

Position: Absolute & Transform Properties

Another method for vertical alignment is by using the position and transform properties together. This one is a bit complicated, so let’s do it step by step.

Step 1: Define Position Absolute

Firstly, we change the positioning behavior of the image from static to absolute :

Also, it should be inside a relatively positioned container, so we add position: relative to its container div.

Step 2: Define Top & Left Properties

Secondly, we define the top and left properties for the image, and set them to 50%. This will move the starting point(top-left) of the image to the center of the container:

Step 3: Define the Transform Property

But the second step has moved the image partially outside of its container. So we need to bring it back inside.

Defining a transform property and adding -50% to its X and Y axis does the trick:

There are other ways to center things horizontally and vertically, but I’ve explained the most common ones. I hope this post helped you understand how to align your images in the center of the page.

If you want to learn more about Web Development, feel free to visit my Youtube Channel for more.

Источник